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Electric Circuits

Electric Circuits
Which of the following has no units?

 Permittivity
 Moment of a magnet
 Permeability
 Magnetic susceptibility

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Electric Circuits
The efficiency in case of maximum power transfer theorem is

 50 %.
 50 % - 100 %.
 less than 50 %.
 100 %.

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Electric Circuits
In parallel RC circuit total current is 5A and current through resistor is 3A. What is the current through capacitor?

 3A
 2A
 5A
 4A

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Electric Circuits
The switch S is the circuit shown in figure is ideal. If the switch is repeatedly closed for 1 ms and opened for 1 ms, the average value of i(t) is

  0.25 mA.
 1 mA.
 0.35 mA.
 0.5 mA.

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Electric Circuits
For same voltage, the ratio resistance of 100 W lamp to resistance of 25 W lamp is

 4.
 16.
 1/4.
 1.

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Electric Circuits
The active and reactive power in an AC circuit are 10W and 20VAR respectively. What is the power factor?

 1.
 0.577.
 0.866.
 0.5.

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MORE MCQ ON Electric Circuits

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