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Electric Circuits

Electric Circuits
Current efficiency in electroplating is usually

  50 to 60 %.
  90 to 98 %.
  99 %.
  70 to 80 %.

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Electric Circuits
The strength of current in 1 H inductor changes at rate of 1 A / sec. Find the voltage across it?

 2 V.
 0.5 V.
 None of these.
 1 V.

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The current in R is

 2.54 A.
 10.16 A.
 5.08 A.
 1.27 A.

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Electric Circuits
The greater the internal resistance of a cell

 the lesser the emf.
 the greater the emf.
 the lesser the terminal voltage.
 the greater the terminal voltage.

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Electric Circuits
The mass of a proton is

 1.672 × 10 - 27 Kg.
 1.609 × 10 - 31 Kg.
 1.602 × 10 - 19 Kg.
 1.675 × 10 - 27 Kg.

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Electric Circuits
To obtain a high value of capacitance, the permittivity of dielectric medium should be

 low
 high
 unity
 zero

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MORE MCQ ON Electric Circuits

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