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Electric Circuits

Electric Circuits
The value of supply voltage for 400 W, 4 Ω load is

 400 V.
 40 V.
 20 V.
 200 V.

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Electric Circuits
200 resistors of 200 Ω each are connected in parallel. Their equivalent resistance will be

 400 Ω.
 4 kΩ.
 200 Ω.
 1 Ω.

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Electric Circuits
What is the reactive power in AC operation?

 Real power × sinθ.
 Real power × cosθ.
 Apparent power × sinθ.
 Apparent power × cosθ.

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Electric Circuits
Whenever current is supplied by a source its terminal voltage

 decreases.
 remains constant.
 increases exponentially.
 increases.

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Electric Circuits
Which of the following quantities consists of SI unit as WATT ?

 Force
 Power
 Current
 Charge

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Electric Circuits
2) Two sinusoidal emfs are given as e1 = Asin(wt+45) and e2 = Bsin(wt-30). The phase difference between the two quantities in degrees is

 75.
 105.
 60.
 15.

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