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Electric Circuits

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

 Voltage.
 Current.
 Power factor.
 All of above.

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Electric Circuits
In ideal system coefficient of coupling(k) is

 ∞
 1
 Both 2 and 3
 0

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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?

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

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Electric Circuits
In the circuit shown in the figure the voltage across the 2 Ω resistor is

 1 V.
 2 V.
 3 V.
 4 V.

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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.
 15 A.
 10 A.
 7 A.

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Electric Circuits
The mass of a neutron of atom is

 1.672 × 10 - 26 Kg.
 1.675 × 10 - 27 Kg.
 1.602 × 10 - 19 Kg.
 1.609 × 10 - 31 Kg.

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