An electrical motor has rating of 10 MVA at 0.8 lag, represented as series RL circuit at a 50 MVA base. Find the impedance value? (4 + j2 ) pu (2 + j4) pu (3 + j4) pu (4 + j3) pu TRUE ANSWER : ? YOUR ANSWER : ?
A 60 Hz frequency voltage would cause a bulb to turn on and off 60 times per second. 120 times per second. 70 times per second. 80 times per second. TRUE ANSWER : ? YOUR ANSWER : ?
In RLC series circuit R = 2Ω, L = 2mH and C = 1μF and applied voltage is 10V DC. Then what is steady state current value? 2A 0A 5A 1A TRUE ANSWER : ? YOUR ANSWER : ?
Two identical resistors are first connected in parallel then in series. The ratio of resultant resistance of the first combination to the second will be 0.25. 0.5. 4. 2. TRUE ANSWER : ? YOUR ANSWER : ?
A balanced three Phase Y-connected load has one phase voltage VB = 277∠45o V. The phase sequence is RYB. The line to line voltage VRY is 480∠ - 45o V. 339∠45o V. 480∠45o V. 339∠- 45o V. TRUE ANSWER : ? YOUR ANSWER : ?
Form factor is equal to Peak factor in case of triangle wave. saw tooth wave. square wave. All of these TRUE ANSWER : ? YOUR ANSWER : ?
The internal resistance of a practical voltage source is considered to be connected in series. either parallel or series. parallel. None of these TRUE ANSWER : ? YOUR ANSWER : ?
A capacitor is charged by a constant 10 mA current sources which is turned on for 1 second. Assuming the capacitor is initially charge free; determine the charge delivered to and the power supplied by the source if the capacitor has a value of 1 mF. 0.1C, 10MW. 0.1C, 100MW. 0.01C, 10MW. 0.01C and 5W. TRUE ANSWER : ? YOUR ANSWER : ?
1 F is theoretically equal to ratio of 1 C to 1 V ratio of 1 V to 1 C 1 ohm of resistance none of these TRUE ANSWER : ? YOUR ANSWER : ?
A motor having a power factor of 0.8 absorbs in active power of 1200 W the reactive power drawn from the supply is _________ VA. 400 130 250 900 TRUE ANSWER : ? YOUR ANSWER : ?