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Electromagnetic Field Theory

Electromagnetic Field Theory
The hysteresis loop of a magnetic material has an area of 5 cm2 with the scale given as 1 cm = 2 AT and 1 cm = 50 mwb At 50 Hz; the total hysteresis loss is

 15 W.
 20 W.
 50 W.
  25 W.

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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 current of 3 A will be

 37.68 µH.
 113.04 mH.
 37.68 mH.
 113.04 µH.

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Electromagnetic Field Theory
For an inductor, current is proportional to

 none of them.
 magnetic field.
 voltage across the inductor.
 both (A) and (B).

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 zero.
 Bil cosθ.
 Bil sinθ.
 BIL.

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Electromagnetic Field Theory
The potential that appears at a point in space due to the current which caused it is called potential

Accelerating
Retardation
Lagging the current
Oscillating

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Electromagnetic Field Theory
For a linear electromagnetic circuit, which of the following statement is true?

 Co-energy is zero.
 Field energy is equal to the co-energy.
 Field energy is lesser than the co-energy.
 Field energy is greater than the co-energy.

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