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Electric Circuits

Electric Circuits
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.

 250
 130
 400
 900

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Electric Circuits
The resistance of 200 W, 200 V lamp is

 800 Ω.
  200 Ω.
 100 Ω.
 400 Ω.

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Electric Circuits
Total instantaneous power supplied by a 3 - φ AC supply to a balanced RL load is

 pulsating with zero average.
 constant.
 zero.
 pulsating with non zero average.

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Electric Circuits
Under resonance condition the power factor of a system is

 any of the above
 lagging
 leading
 unity

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Electric Circuits
In the network shown, what is the current I in the direction shown?

 0 A.
 4 A.
 1 / 3 A.
 5 / 6 A.

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Electric Circuits
For symmetrical wave form average value of one full cycle is

 1.11
 2.22
 0
 1

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