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Electric Circuits

Electric Circuits
Unit of apparent power is

 VA.
 VAR.
 KWhr.
 Watts.

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Electric Circuits
If one cycle of AC waveform occurs every millisecond, the frequency will be

 10 kHz.
 100 Hz.
 1000 Hz.
 50 Hz.

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Electric Circuits
Sulphation in a lead acid battery occurs due to

 heavy charging.
 fast charging.
 trickle charging.
 incomplete charging.

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Electric Circuits
A capacitor is connected to supply with switch and the switch is connected between capacitor and supply. Initially switch is open at time zero, and then switch is closed. Then how capacitor behaves at time t = 0+?

 short circuit.
 dielectric losses decreases.
 dielectric losses increases.
 open circuit.

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Electric Circuits
The rms value of the resultant current in a wire which carries a DC current of 10A and a sinusoidal current of peak value 20A is

 22.4A.
 17.3A .
 30A.
 14.14A.

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Electric Circuits
The value of V in the circuit shown in the given figure is

 5 V.
  2 V.
 4 V.
  3 V.

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MORE MCQ ON Electric Circuits

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