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Electric Circuits

Electric Circuits
For same voltage, the ratio resistance of 100 W lamp to resistance of 25 W lamp is

 1/4.
 4.
 1.
 16.

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Electric Circuits
In a 3 - φ delta connection, two-wattmeter method is used to measure the power; if the two watt meters read 28.13 kW and 13.31 kW, the power factor of connection will be

 0.85.
 0.4.
 0.6.
 0.9.

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Electric Circuits
In RLC series circuit, at resonance condition the value of current is

 Maximum
 Zero
None of these
 Minimum

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Electric Circuits
In the given figure the value of the source voltage is

 44 V.
 12 V.
 30 V.
 24 V.

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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?

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

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Electric Circuits
In steady state condition capacitor acts as a

 current source
 voltage source
 short circuit
 open circuit

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MORE MCQ ON Electric Circuits

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