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Electric Circuits

Electric Circuits
Current efficiency in electroplating is usually

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

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Electric Circuits
What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons?

 39.
 19.
 20.
 38.

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Electric Circuits
Purpose of using capacitor is / are

 to do phase split in AC 1 phase motor.
 increase p.f of inductive load circuit.
 effect DC filter in electronic circuit.
 all of these.

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Electric Circuits
The frequency of EMF generated by a generator depends upon its

 both speed and number of poles.
 nature of supply.
 speed.
 number of poles.

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Electric Circuits
In given figure, the value of resistance R in Ω is

 1 Ω
 3.5 Ω
 4.5 Ω
 2.5 Ω

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Electric Circuits
The unit of resistivity is

 Ω / m².
 Ω.
 Ω / metre.
 Ω - metre.

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MORE MCQ ON Electric Circuits

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