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Electric Circuits

Electric Circuits
Voltage magnification will occur in which of the following case?

None of these
 Parallel resonance
 Series resonance
 Both

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Electric Circuits
Which material has extremely large resistance?

 Insulator
 Semiconductor
 Conductor
None of these

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Electric Circuits
The strength of current in 1 H inductor changes at rate of 1 A / sec. Find the voltage across it?

 0.5 V.
 None of these.
 2 V.
 1 V.

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Electric Circuits
What is the reactive power in AC operation?

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

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Electric Circuits
A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled, then voltage across each resistor is

 halved.
 doubled.
 remain same.
 increase by two times.

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Electric Circuits
A capacitor that stores charge of 0.5 C at 10 V has a capacitance of _____________ farad.

 0.05.
 20.
 10.
 5.

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