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Electric Circuits

Electric Circuits
Kirchhoff's second law is based on law of conservation of

 energy.
 momentum.
 mass.
 charge.

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Electric Circuits
Types of rotating machines

 transformer.
 both B and C.
 IM.
 synchronous machine.

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Electric Circuits
A 3 – φ delta connected symmetrical load consumes P Watts of power from a balanced supply. If the same load is connected in star to the same supply then what is the power consumption?

 P.
 P/3.
 3P.
 √3P.

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Electric Circuits
A 100 μF capacitor supplied from 3 V source with a frequency of 50 Hz. The capacitive reactance is

 15.92 Ω.
 31.84 Ω.
 7.96 Ω.
 63.68 Ω.

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Electric Circuits
A capacitor is charged by a constant 10 mA current sources which is turned on for 1 second. Assuming the capacitor is initially charge free; determine the charge delivered to and the power supplied by the source if the capacitor has a value of 1 mF.

 0.01C and 5W.
 0.1C, 100MW.
 0.1C, 10MW.
 0.01C, 10MW.

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Electric Circuits
The capacitive reactance of an electric circuit is 50 Ohms. The frequency of supply becomes doubled. What is the new capacitive reactance?

 50 Ohms.
 200 Ohms.
 25 Ohms.
 100 Ohms.

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MORE MCQ ON Electric Circuits

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