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Electric Circuits

Electric Circuits
Which of the following has no units?

 Magnetic susceptibility
 Permeability
 Moment of a magnet
 Permittivity

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Electric Circuits
A positive and a negative charged conductor are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

 5 times greater than before.
 25 times larger than before.
 10 times greater than before.
 5 times smaller than before.

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Electric Circuits
Sulphation in a lead acid battery occurs due to

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

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

 20.
 0.05.
 5.
 10.

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Electric Circuits
VRN, VYN and VBN are three phase voltage of a balanced three phase system. If VRN = 200∠30o V and VBN = 200∠- 90o V, then phase sequence of the system is

 YRB.
 RYB.
 BRY.
 RBY.

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Electric Circuits
A wire of resistance R has it length and cross - section both doubled. Its resistance will become

 2R.
 R.
 4R.
 0.5R.

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MORE MCQ ON Electric Circuits

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