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Electric Circuits

Electric Circuits
In the figure given, the value of R is

 10 Ω.
 24 Ω.
 12 Ω.
 18 Ω.

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Electric Circuits
The resistance of 200 W, 200 V lamp is

 800 Ω.
  200 Ω.
 100 Ω.
 400 Ω.

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Electric Circuits
Current efficiency in electroplating is usually

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

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Electric Circuits
In series R, L circuit power factor can be defined as

 R/Z
 P/S
 Vr/V
All of these

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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+?

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

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Electric Circuits
The switch S is the circuit shown in figure is ideal. If the switch is repeatedly closed for 1 ms and opened for 1 ms, the average value of i(t) is

 0.35 mA.
  0.25 mA.
 0.5 mA.
 1 mA.

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MORE MCQ ON Electric Circuits

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