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Electric Circuits

Electric Circuits
If P is the power of a star connected system then what will be power of an equivalent delta connected system?

 3P
None of these
 P
 P/3

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Electric Circuits
Current efficiency in electroplating is usually

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

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Electric Circuits
In a capacitive circuit, the capacitive reactance is

 directly proportional to the square of frequency
 indirectly proportional to frequency
 directly proportional to frequency
 indirectly proportional to the square of frequency

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Electric Circuits
The time required for a pulse to change from 10 % to 90 % of its maximum value is known as

 fall time.
 decay time.
 rise time.
 run time.

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Electric Circuits
A current is said to be alternating when it changes in

 none of these.
 direction.
 both ‘a’ and ‘b’.
 magnitude.

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Electric Circuits
A capacitor is connected to supply with switch and the switch is connected between capacitor and supply. Initially switch is open at time zero, and then switch is closed. Then how capacitor behaves at time t = 0+?

 short circuit.
 open circuit.
 dielectric losses decreases.
 dielectric losses increases.

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MORE MCQ ON Electric Circuits

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