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Electric Circuits

Electric Circuits
In ideal system coefficient of coupling(k) is

 0
 1
 ∞
 Both 2 and 3

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Electric Circuits
A capacitor carries a charge of 0.3 C at 20 V. Its capacitance is

 0.015 F.
 1.5 F.
 1.5 μF.
 15 μF.

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Electric Circuits
Zinc cadmium and lead coating is generally provided for

  decoration.
  electrical contacts.
  corrosion.
  all of above.

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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

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

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Electric Circuits
Two wires of A and B of the same material and length ‘l’ and ‘2l’ have radius ‘r’ and ‘2r’ respectively. The ratio of their specific resistance will be

 1:2.
 1:8.
 1:1.
 4:1.

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Electric Circuits
If a resistor and a capacitor are connected to form series R - C circuit across a voltage source. If frequency of voltage source increases

 the current decreases.
 the current increases.
 the current remain unaltered.
 the current decreases abruptly.

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MORE MCQ ON Electric Circuits

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