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Electric Circuits

Electric Circuits
In direct arc furnace which of following is of high value?

 Current.
 Power factor.
 Voltage.
 All of above.

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Electric Circuits
Which of the followings is the expression for energy stored in a capacitor?

 Cv.
 C dv / dt.
 C / v.
 (1 / 2) Cv2.

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Electric Circuits
A capacitor carries a charge of 0.1 C at 5 V. Its capacitance is

 0.05 F
 0.02 F
 0.2 F
 0.5 F

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Electric Circuits
What is a resistor?

 Inductor
 Capacitor
 Hello
 Test

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Electric Circuits
A capacitor has a capacitance of 6 μF. Calculate the stored energy in it if a DC voltage of 100 V, is applied across it?

 4 × 102 joules.
 3 × 102 joules.
 2.5 × 102 joules.
 6 × 102 joules.

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

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

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MORE MCQ ON Electric Circuits

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