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Electric Circuits

Electric Circuits
The average value of half wave rectified sinusoidal current waveform, whose maximum value is 1A is

 0.637 A.
 1 A.
 0.5 A.
 0.318 A.

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Electric Circuits
Kirchhoff's second law is based on law of conservation of

 energy.
 charge.
 mass.
 momentum.

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Electric Circuits
Energy efficiency during electroplating is usually in the range

 50 to 80%.
 80 to 85%.
 90 to 99%.
 85 to 90%.

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Electric Circuits
1 F is theoretically equal to

 none of these
 ratio of 1 V to 1 C
 1 ohm of resistance
 ratio of 1 C to 1 V

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Electric Circuits
A 230V, 50Hz voltage is applied to a coil having L = 5H and R = 2 Ohm in series with capacitance C. When the voltage across the coil is 400V, find the value of C?

 10.54 µF.
 4.78 µF.
 8.51 µF.
 1.8 µF.

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Electric Circuits
Which of the following has no units?

 Magnetic susceptibility
 Permeability
 Moment of a magnet
 Permittivity

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MORE MCQ ON Electric Circuits

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