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Electric Circuits

Electric Circuits
Select the wave that has the least value of form factor.

 Square wave.
 Rectangular wave.
 Triangular wave.
 Sine wave.

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Electric Circuits
A 50 μF capacitor is charged to retain 10 MJ of energy by a constant charging current of 1 A. Determine the voltages across the capacitor?

 60 V.
 20 V.
 30 V.
 50 V.

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Electric Circuits
Internal resistance of ideal voltage source is

 finite
 infinite
 100 ohms
 zero

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Electric Circuits
The instantaneous values of line current into a delta connected load in any two lines are + 2.5 amps and - 1.25 amps the current in the third line at the instant is ___________ A.

 - 1.25
 1
 2.5
 10

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Electric Circuits
The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be

 4R Ω
 2R Ω
 8R Ω
 R Ω

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Electric Circuits
In RL series circuit R=2Ω and L=2mH. What is the value of time constant?

 4msec
 2msec
 100sec
 1msec

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MORE MCQ ON Electric Circuits

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