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Electric Circuits

Electric Circuits
Which metal is deposited for electro forming?

  Chromium.
  Nickel.
  Silver.
  Iron.

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Electric Circuits
i) In star connection line current is equal to phase current. ii) In delta connection line voltage is equal to phase voltage. For a given phase connected to the particular line which of the statement is true ?

 Only (2).
 Only (1).
 Both (1) and (2).
 None of these.

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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

 R Ω
 4R Ω
 2R Ω
 8R Ω

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Electric Circuits
In RC series circuit R = 2Ω, C = 2μF and 10V dc is applied. Then what is the value of current?

 10A
 0A
 2A
 5A

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Electric Circuits
An equipotential surface is one which has all points at _____________ potential.

 same.
 none of them.
 different.
 zero.

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Electric Circuits
Time constant is the time taken for response to rise -------of maximum value?

 100%
 90%
 68.3%
 63.2%

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MORE MCQ ON Electric Circuits

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