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Electric Circuits

Electric Circuits
The energy stored by a capacitor is given by

 1/2 CV2.
 Q2 / 2C.
 all of them.
 1/2 QV.

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Electric Circuits
Power factor can be defined as

 cosine of angle between voltage and current.
 both option B and C.
 sine of voltage and current.
 ratio of resistance versus impedance.

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Electric Circuits
An electric field can deflect

 alpha particles.
 neutrons.
 gamma-rays.
 x-rays.

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Electric Circuits
During charging, the electrolyte of a lead acid battery becomes

 there is no change in electrolyte.
 weaker.
 stronger.
 diluted with water.

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Electric Circuits
The resistivity of semi-conductors at room temperatures is

 0.01 to 50 ohm - cm.
 1000 to 1500 ohm - cm.
 109 to 1012 ohm - cm.
 1.6 × 106 to 100 × 106 ohm - cm.

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Electric Circuits
A wire of 0.14 mm diameter and specific resistance 9.6 Ω - cm is 440 cm long. The resistance of the wire will be

 11.3 Ω.
 9.6 Ω.
 27.4 Ω.
 13.7 Ω.

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MORE MCQ ON Electric Circuits

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