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Electrical Engineering Questions and Answers January 07, 2020

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Calculate the overall transmission loss for a wall consisting of the following components, using i) the exact method, and ii) the approximate method (T 5.2) Door: 2 entrance door, each with an area of 16 ft 2 , TL = 37 dB a. Window: 2 windows, each with an area of 7 ft 2 , TL = 25 dB b. Wall: 255 ft 2 portion not including door & windows, TL =

Consider discretetime signals x, n and x2n respectively given as (a) x1n 28n 2 un un 2, 3D x2n un 1 un 2 28n 3. and Sketch the waveforms of x,n and x2 n. Find the convolution x1n x2n. (i) (ii) Consider continuoustime signals x1 (t) and x2(t) respectively given as (b) (t1 1

What effect does decreasing the field current below its nominal value have on the speed-versus-voltage tic of a separately-excited dc motor?

What is the advantage of increasing the field current above its nominal value for a short time interval when starting a separately-excited dc motor?

Does the speed of a shunt motor increase or decrease when the armature Current increases?

What is the advantage of decreasing the field current of a separately-excited dc motor below its nominal value?

Write A Shell Script To Print A Number In Reverse Order. It Should Support The Following Requirements. 5. a. The script should accept the input from the command line. b. If you don't input any data, then display an error message to execute the script correctly a. b.

From the encoding table as shown below Table 1 Symbol Frequency Codeword A 0.29 0.25 100 0.13 101 D 0.15 1100 0.08 1101 0.07 1110 1111 G 0.03 a) Is this a valid prefix code If yes, build the prefix tree according to the table above if no, explain why not b) Now, use Huffman code to assign new codewords to the symbols (AG) above. Follow the

Bob has a public RSA key (n = 77, e = 13). He sends Alice a message m and the digital signature s of the message. The message and signature that Alice receives is (m = 3, s = 5). Should Alice accept the message as genuine or not? You must give justification for your answer.

Prove Aplha, Beta and K by using Given Parameters.

Given z dt BN 27B Selection hessure. tB(NH) Prover in x z2N (N) (N1) N(Nl) B2(01) N(Nl) Given Kd tKB (kt I) (k1) Praer (2 ) 2 B) 4x (2aB). ABT (ue) 2B

A received signal has a bandwidth of 10 kHz and its power is uniformly distributed over this bandwidth. The bandwidth of the receiver is 15 kHz. The signal power density is 12 nW Hz -1 and the noise power density is uniform across the receiver bandwidth at 40 pW Hz -1 . Calculate both the signal power and noise power. Hence calculate the

A 10KVA, 50 Hz transformer was found to have an efficiency of 98 at fullload, 0.8 power factor lagging. It was also found that the maximum efficiency was obtained at 85 fullload, at the same power factor. Determine the core loss P, copper loss at full load Pouf and the maximum efficiency of the transformer nmax at 0.8 power factor lagging i. Enter
A 10-KVA, 50 Hz transformer was found to have an efficiency of 98% at full-load, 0.8 power factor lagging. It

THE DOMESTIC POWER LOAD IN A HOUSE COMPRISES THE FOLLOWING 8 LAMPS OF 100W EACH, 3 FANS OF 80W EACH, 1 REFRIGERATOR OF 12 hp 1 HEATER OF 1000w. (a) CALCULATE THE TOTAL CURRENT TAKEN FROM THE SUPPLY OF 230V. (b) CALCULATE THE ENERGY CONSUMED IN A DAY, IF ON AN AVERAGE ONLY A QUARTER OF ABOVE LOAD PERSISTS ALL THE TIME.
THE DOMESTIC POWER LOAD IN A HOUSE COMPRISES THE FOLLOWING 8 LAMPS OF 100W EACH, 3 FANS OF 80W EACH, 1

For the network shown in figure 10 V4 R 100 ks2 C R. 200442 A. Determine the voltage across the capacitor and current through the capacitor at t 20 mS, following the closure of the switch at t0 to position 1 B. The switch is closed on to position 2 when t100ms determine the capacitor voltage and current at t 120 mS. FINESTRE
For the network shown in figure: 10 V4 R 100 ks2 C R. 200442 A. Determine the voltage across the capacitor