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Electric Circuits

Electric Circuits
Coating generally recommended for hard surfacing is

 chromium plating.
 copper plating.
 lead plating.
None of these

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Electric Circuits
Say A point has an absolute potential of 40 V and point B has an absolute potential of - 10 V, then what will be the value of VBA ?

 50 V.
  30 V.
  - 50 V.
  none of above.

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Electric Circuits
The rms value of the resultant current in a wire which carries a DC current of 10A and a sinusoidal current of peak value 20A is

 30A.
 22.4A.
 17.3A .
 14.14A.

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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.
 None of these.
 1 V.
 0.5 V.

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Electric Circuits
Which quantity should be measured by the voltmeter ?

 Current
 Voltage
 Speed
 Power

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Electric Circuits
Efficiency of electrical machines should be calculated by measuring

 losses and output.
 losses.
 losses and input.
 output and input.

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MORE MCQ ON Electric Circuits

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