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Electromagnetic Field Theory

Electromagnetic Field Theory
The magnetic intensity in A/m at the centre of circular coil of diameter 1m and carrying a current of 2A is

 4.
 3.
 2.
 8.

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Electromagnetic Field Theory
The field at any point on the axis of a current carrying coil will be

 perpendicular to the axis.
 parallel to axis.
 zero.
 at angle of 45° with the axis.

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Electromagnetic Field Theory
The Biot-savarts law is a general modification of

 Lenzs law.
 Faradays law.
 Amperes law.
 Kirchhoffs law.

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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

 50 W.
 15 W.
  25 W.
 20 W.

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Electromagnetic Field Theory
Skin depth is proportional to

 Permeability.
 1/√σ.
 Frequency.
 √(σ).

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Electromagnetic Field Theory
Magnetic flux density emerging out of a closed surface is

 depends on magnetic movements inside the closed surface.
 infinite.
 zero.
 depends on magnetic movements outside the closed surface

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MORE MCQ ON Electromagnetic Field Theory

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