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Electromagnetic Field Theory

Electromagnetic Field Theory
The heating time constant of an electrical machine gives an indication of its

 rating.
 cooling.
 short time rating.
 overload capacity.

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Electromagnetic Field Theory
A conductor of length L has current I passing through it, when it is placed parallel to strong magnetic field. The force experienced by the conductor will be

 BIL.
 zero.
 BL2I.
 BI2L.

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Electromagnetic Field Theory
What is the unit of magnetic charge

 Coulomb.
 Ampere-meter square.
 Ampere.
  Ampere meter.

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Electromagnetic Field Theory
A coil of 300 turns is wound on a non magnetic core having a mean circumference of 300 mm and a cross sectional area of 300 mm2. The inductance of the coil corresponding to a magnetizing current of 6 A will be

  113.04 μH.
 3.768 μH.
 37.68 μH.
 1.1304 μH.

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying a current at 10 amp, is

 1.15 joule.
 0.15 joule.
 0.015 joule.
 0.015 joule.

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Electromagnetic Field Theory
When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called

Dispersion
Scattering
Absorption
Polarisation

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MORE MCQ ON Electromagnetic Field Theory

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