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Electric Circuits

Electric Circuits
The rms value of sinusoidal voltage wave V = 200sinω0t

 200 V.
 100 V.
 200√2 V.
 100√2 V.

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Electric Circuits
Two identical resistors are first connected in parallel then in series. The ratio of resultant resistance of the first combination to the second will be

 0.5.
 2.
 4.
 0.25.

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Electric Circuits
Unit step function is first derivative of

 gate function.
 ramp function.
 impulse function.
 parabolic function.

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Electric Circuits
A coil of negligible resistance has an induction of 100 mH. The current passing through the coil changes from 2 A to 4 A at a uniform rate in 0.1 sec the voltage across the coil during this time would be __________ V.

 50
 8
 2
 36

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Electric Circuits
In the above question find the angle between voltage and current?

 60.
 30.
 90.
 54.74.

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Electric Circuits
Ceq of two capacitors connected in series is given by

 C1C2.
 C1 C2 / (C1 + C2).
 C1 = C2.
 C1 + C2.

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