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Electric Circuits

Electric Circuits
Total power consumed in the circuit below is 10 W. Find X.

 3 A.
 None of these.
  2 A.
 1 A.

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Electric Circuits
Two equal resistors R connected in series across a voltage source V dissipate power P. What would be the power dissipated in the same resistors when they are connected in parallel across the same voltage source?

 16P.
 4P.
 2P.
  P.

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Electric Circuits
What is apparent power in AC operation?

 Product of voltage and current at no load.
 Product of rms voltage and rms current.
 Product of voltage and current.
 Product of voltage and current at full load.

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Electric Circuits
When power factor angle is varying, the shape of the current locus is

 Semicircle
 Straight line
 Circle
 Triangle

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Electric Circuits
A wire 2.5 m long is bent into a square. An current of 100 A flowing through the wire will produce a magnetizing force at the center of the square, equal to

 196 AT / m.
 222 AT / m.
 72 AT / m.
 144 AT / m.

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Electric Circuits
Time constant is the time taken for response to rise -------of maximum value?

 68.3%
 63.2%
 90%
 100%

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MORE MCQ ON Electric Circuits

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