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Electric Circuits

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

 All of above.
 Voltage.
 Current.
 Power factor.

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Electric Circuits
A conductor of length l meters moves at right angles to a uniform magnetic field of flux density B = 1.5 T. if the velocity of revolution of the conductor is 50 ms-1 then induced e.m.f. in the conductor is

 100 V.
 125 V.
 0 V.
 75 V.

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Electric Circuits
The resistivity of semi-conductors at room temperatures is

 0.01 to 50 ohm - cm.
 109 to 1012 ohm - cm.
 1000 to 1500 ohm - cm.
 1.6 × 106 to 100 × 106 ohm - cm.

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Electric Circuits
To find the initial value of a function, the highest power of S in denominator should be ---------- the highest power of S in the numerator.

 greater than
 both a and c
 equals to
 less than

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Electric Circuits
For the circuit given in the figure the power delivered by the 2 V source is given by

 - 4 W.
 2 W.
 - 2 W.
 4 W.

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Electric Circuits
If P is the power of a star connected system then what will be power of an equivalent delta connected system?

 P/3
 3P
 P
None of these

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MORE MCQ ON Electric Circuits

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