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# R, R R4 Figure 3 12) Find the total resistance

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## Transcribed Image Text

R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ... R, R R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, 8, R. 3, R, = 5, R.-8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 2 resistor, given that R, = 22 3 | Page ID NUMBER:.. I-8 A Fig 4 I = 14) Calculate the current in the 2 resistor, given R,= 42 in fig 4 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. ID NUMBER:. 12 1 18 2 22 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = . I, 20 2 30 2 40 12 10 2 20 V 50 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = . 26) Find the current in the second loop I, (use mesh analysis method) 1,= . 27) Find the current in the third loop I: (use mesh analysis method) I= . 4G 3G O 66 I 2:57 Exams.docx 7|Page ID NUMBER:. Section B Attempt all questions in this section in the answer booklet provided. Question 1 [10 marks] a) Find the total resistance of the circuit RAB of figure la B 102 102 100 50 152 30n Figure la b) Find the total current in the circuit in figure lb 20 2n A 20 20 30V 20 in in Figure 1b 8 | Page O 66 I 2:57 4G 3G Exams.docx 8 | Page ID NUMBER:. Question 2 [20 marks] a) Use Thevenin's theorem to find the current through the 5Q resistor of the circuit in figure 2 20 50 20 b C e 30 20 7V 10 V a d f 20 Figure 2 b) Use Norton's theorem to find the current through the 32 resistor of the circuit in figure 2 Question 3. Write short notes explaining how electricity is generated at a hydropower station and thermal power station and how the electricity is transported to the end user. Give three advantages and disadvantages of both systems. GOOD LUCK 9| Page 4G ll A O O 67I 2:56 Exams.docx 团: 6| Page ID NUMBER:. A-d R. 1-A R, Ry R, Ro B Co R1 (a) (b) Figure 11 28) Transform Fig 11 a to Fig 11 b given R,=22, R = 62, R; = 32 R, R, R = 29) Transform Fig 11b to Fig 11la given R. = 32, R.=32, R. = 3N R = R2 R, = 30) Using Thevenin's Network Theorem find VTH Wwhen finding the current through the 50 resistor in the circuit of fig 12. 50 10 0 12 Q -4 V 15 0 6 V Figure 12 Vu = 7|Page 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:.. 30 2 60 2 R2 30 2 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, 20) For the network shown in fig 6 find I, I = 20 V R2 25 2 40 2 13 15 2 102 RA Figure 7 21) Calculate VAn in fig 7 VAR = 22) A 230 V lamp is rated to pass a current of 0.26 A. Calculate its power outpu P = 23) A current of 3 A flows through a 102 resistor. Find the power developed by resistor. P = 5| Page ID NUMBER:.. 4G ll A O O 67 2:55 Exams.docx 团: R4 Figure 3 12) Find the total resistance of the circuit in figure 3 given R, = 8, R2 = 3, R, = 5, R.=8 a. Rr = 13) A current of 8 A is shared between two resistors in the network shown in Fig. 4 Calculate the current in the 2 Q resistor, given that R,= 20 3 |Page ID NUMBER:.. -8 A 12 R2 Fig 4 I = 14) Calculate the current in the 20 resistor, given R,= 42 in fig 4 =3 A 主 Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown in Fig. 5. 4G ll A O O 67I 2:56 Exams.docx ID NUMBER:. 12 1 18 2 2 10 V 20 V Fig 24) Calculate the currents in fig 8 I, = I, = 20 2 30 2 10 2 20 V 100 V S0 V Figure 10 25) Find the current in the first loop I, (use mesh analysis method) I, = 26) Find the current in the second loop I, (use mesh analysis method) I= .... 27) Find the current in the third loop I (use mesh analysis method) I= 6| Page ID NUMBER: 4G O 67I 2:56 Exams.docx Fig 5 15) Write down the current relationships for junctions a, b and c of the network shown Fig. 5. For junction a 16) For junction b 17) For junction c 18) Determine the currents I, I, and Is. 4 | Page ID NUMBER:.. 1, R1 30 2 -- 60 2 R2 R3 30 2 12 I=1 A Figure 6 19) For the network shown in fig 6 find I, I, =. 20) For the network shown in fig 6 find I, I = O 67 || 2:55 Exams.docx 7. Consider these two scenarios and comment on the reason for the observations. Scenario 1: A bird standing on a bare energized high tension is not electrocuted Scenario 2: A human being touching a bare live wire without any protection is electrocuted. 2|Page ID NUMBER:. 3.502 20 72 25V Find the current in each of the resistors of the circuit above using total resistance and voltage drop principle. 8) Current through 20 resistor is 9) Current through 42 resistor is 10) Current through 52 resistor is 11) Total resistance of the circuit R,=........ Figure 3 12) Find the total resistance of the circuit in figure 3 given R. = 8, R: = 3, R, = 5, R.=8 a. R= ........ ...

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