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Electric Circuits

Electric Circuits
Ampere second is the unit of

 charge.
 energy.
 power.
 conductance.

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Electric Circuits
The equation for 25 cycles current sine wave having rms value of 30 amps, will be

 42.4sin50πt.
 30sin25πt.
 42.4sin25πt.
 30sin50πt.

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Electric Circuits
Instantaneous power in inductor is proportional to the

 square of instantaneous current.
 square of the rate of change of current.
 product of the instantaneous current and rate of change of current.
 temperature of the inductor.

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Electric Circuits
In series RLC circuit to get Q>1, which of the following is required?

 XL < R
 XL = R
 XL > R
All of these

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Electric Circuits
Efficiency of electrical machines should be calculated by measuring

 losses and output.
 losses and input.
 losses.
 output and input.

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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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MORE MCQ ON Electric Circuits

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