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Electric Circuits

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

 Power factor.
 All of above.
 Voltage.
 Current.

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Electric Circuits
A 2m long conductor, carries a current of 50 A at a magnetic field of 100 × 10 − 3 T. The force on the conductor is

 10 N.
 10000 N.
 100 N.
 1000 N.

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Electric Circuits
How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?

 1200
 10
 60
 600

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Electric Circuits
The terminals across the source are ___________ if a voltage source is to be neglected.

 short circuited.
 open circuited.
 replaced by a shunt resistance.
 replaced by a series resistance.

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Electric Circuits
To obtain wide bandwidth, network is designed with which of the following?

 Low Q factor
 Unity Q factor
 High Q factor
 Zero Q factor

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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.

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

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