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Electric Circuits

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

 Current.
 Voltage.
 All of above.
 Power factor.

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Electric Circuits
The rms value of the voltage U(t)= 3 + 4cos(3t)

  5 V.
 7 V.
  4.123 V.
 {3 + 2(1.141)} V.

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Electric Circuits
Two wires of A and B of the same material and length ‘l’ and ‘2l’ have radius ‘r’ and ‘2r’ respectively. The ratio of their specific resistance will be

 4:1.
 1:2.
 1:1.
 1:8.

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Electric Circuits
Inductor does not allow the sudden change of

 current
 voltage
None of these
 power

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Electric Circuits
A circuit contains two unequal resistor in parallel

 currents in both are same.
 voltage drops across both are same.
 heat losses in both are same.
 voltage drops are according to their resistive value.

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Electric Circuits
An electric field line and an equipotential surface are

 none of above.
 always perpendicular.
 inclined at any angle.
 always parallel.

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MORE MCQ ON Electric Circuits

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