ELECTRIC CIRCUITS QUIZ

A paper capacitor is usually available in form of

tubes.

meshed plates.

rolled foil.

disc.

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YOUR ANSWER : ?

If the measured value of a capacitor is 205.3µF and true value is 201.4µF the percentage relative error is

39.00%

1.89%

1.94%

25.64%

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A 2m long conductor, carries a current of 50 A at a magnetic field of 100 × 10 − 3 T. The force on the conductor is

10 N.

1000 N.

100 N.

10000 N.

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A parallel plate capacitor with air as dielectric, force between plate is F. If capacitor is now immersed water of dielectric εr, force between plate will be –

0.

F.

εr/F.

F εr.

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Types of rotating machines

IM.

both B and C.

synchronous machine.

transformer.

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A piece of copper and another piece of germanium are cooled from room temperature to 80K. The resistance of

each of them decreases.

each of them increases.

copper decreases and germanium increases.

copper increases and germanium decreases.

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YOUR ANSWER : ?

Two point charges of 4μC are placed at a distance of 3 cm apart from each other in free space. Force acting on two charges will be

0.02 N

160 N

400 N

100 N

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Internal heating of a capacitor is usually attributed to

plate vibration.

dielectric charge.

electron movement.

leakage resistance.

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Coating generally recommended for hard surfacing is

chromium plating.

None of these

lead plating.

copper plating.

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Given network is having N nodes and B branches, then number of twigs are

N - 1.

N.

B - N - 1.

B - N + 1.

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