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Electric Circuits

Electric Circuits
Unit of apparent power is

 KWhr.
 VAR.
 Watts.
 VA.

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Electric Circuits
For the circuit shown below the value of R is adjusted so as to make the current in RL equal to zero. Calculate the value of R.

 4 Ω.
 3 Ω.
 2 Ω.
 1 Ω.

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Electric Circuits
Which of the followings is the expression for energy stored in a capacitor?

 C / v.
 C dv / dt.
 Cv.
 (1 / 2) Cv2.

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Electric Circuits
What is meant by the rate of flow of an electric charge?

 Electric current.
 Electric potential.
 Electric resistance.
None of these

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Electric Circuits
A 10 Ohm resistor has power rating of 1W. Find the maximum current rating.

 0.01 A.
 0.316 A.
 0.1 A.
 1 A.

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Electric Circuits
Resistance of which material does not change with change in temperature?

 Tungsten.
 Brass.
 Platinum.
 Metal alloys constantan and manganin.

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