All on ELECTRIC CIRCUITS - REVIEW PRACTICE Electric Potential Difference & Current V = AE I = At 1. Calculate the amount of charge if the potential difference across a light bulb is 120 V and the bulb converts 480 J of energy. 2. Calculate the amount of current in a wire if 0.75 C of charge passes through a point in 1.7 min. 3. How many Coulomb's of charge pass through a wire that carries 3.2 A of current for 5.0 h? 4. Calculate the energy used by a 60 V light bulb that has a current of 0.5 A passing through it in 60 s. 5. Calculate the amount of current if 5000 J of energy is converted in a 120 V load in 270 s. Combination Circuits Series Parallel VT = VitVz+ V3+. VT = V1 = V2 = V3=. V IT = 1 = 12 = 13 =.. IT= I1 + 12+ 13+ .. R RT = R1+ R2+ R3+... 1 1 1 1 - + ... RT R1 R2 Solve all the missing quantities for each of the following combination circuits. 6. (a) Section I (A) R (2) V ( V) 1 1 50 2 50 25 3 50 T 60 6. (b) Section I (A) R (12) V (V) 1 1 64 2 0.4 2 3 0.6 4 72 T 180 AE QE AE 480 120 2). Given: 6 .75 c 1 . 7 min I = ? 1 . 7 min At = 102 EF 1. 7 min = 0.75 102