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Electric Circuits

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

 2msec
 4msec
 100sec
 1msec

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Electric Circuits
The plates of lead acid storage battery are most likely to be short circuited if

 the battery charged too slowly.
 sediment collect at the bottom of the battery.
 the electrolyte evaporates.
 too much water is added.

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Electric Circuits
In RLC series circuit R = 2Ω, L = 2mH and C = 1μF and applied voltage is 10V DC. Then what is steady state current value?

 1A
 0A
 5A
 2A

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Electric Circuits
Instantaneous power in inductor is proportional to the

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

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Electric Circuits
Types of rotating machines

 IM.
 both B and C.
 synchronous machine.
 transformer.

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Electric Circuits
Fall time is the time required for a pulse to decrease from 90 to ________% if its maximum values

 15
 10
 5
 20

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