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Electric Circuits

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

 Power factor.
 Voltage.
 Current.
 All of above.

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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

 125 V.
 0 V.
 75 V.
 100 V.

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Electric Circuits
Nodal analysis can be applied for

 non planar networks.
 neither planar and non planar networks.
 both planar and non planar networks.
 planar networks.

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Electric Circuits
Which part of magnetic path requires largest mmf?

 Inductance.
 Core.
 Air gap.
 Coil.

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Electric Circuits
A circuit with resistor, inductor, capacitor in series is resonant of 50 Hz. If all the values are now doubled, the new resonant frequency is

 f0 / 2.
 2f0.
 still f0.
 f0 / 4.

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Electric Circuits
In above question, if circuit efficiency is 90 %. What will be output power ?

  30 kW.
  35.6 kW.
  37.3 kW.
  40 kW.

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MORE MCQ ON Electric Circuits

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