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Electric Circuits

Electric Circuits
Select the wave that has the least value of form factor.

 Sine wave.
 Triangular wave.
 Square wave.
 Rectangular wave.

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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+?

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

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Electric Circuits
Which of following is invariably seen in an electroplating plant?

  Rectifier.
  Barrel.
  Carbon brushes.
  Distilled water.

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Electric Circuits
Consider the following circuit. In this circuit, when Vs = 3 V, I = 4 A, what is the value of I when Vs = 12 V?

 20 A.
 7 A.
 15 A.
 10 A.

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Electric Circuits
A motor having a power factor of 0.8 absorbs in active power of 1200 W the reactive power drawn from the supply is _________ VA.

 130
 900
 400
 250

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Electric Circuits
The maximum value of a current wave is 2A. If the form factor of a current wave is 1.5 and the peak factor is 2.7, find the rms value in Amperes.

 1.57 A.
 1.414 A.
 0.741 A.
 0.494 A.

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