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Electric Circuits

Electric Circuits
The life of a lead acid battery is expected to be

 1 year.
 6 months.
 2 to 5 years.
 10 to 15 years.

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Electric Circuits
The synchronous speed for the seventh space harmonic mmf wave of 8 pole, 50 Hz induction machine will be

 107.14 rpm in forward direction.
 107.14 rpm in reverse direction.
 5250 rpm in forward direction.
 5250 rpm in reverse direction.

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Electric Circuits
Unit step function is first derivative of

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

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

 2msec
 100sec
 4msec
 1msec

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Electric Circuits
The resistance of 200 W, 200 V lamp is

  200 Ω.
 400 Ω.
 800 Ω.
 100 Ω.

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Electric Circuits
Instantaneous power in inductor is proportional to the

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

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MORE MCQ ON Electric Circuits

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