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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

 8.
 2.
 3.
 4.

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Electromagnetic Field Theory
Two parallel plates are separated by a distance D charged by V volt. The field intensity E is given by,

 V² / D
 V × D²
 V / D
 V × D

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Electromagnetic Field Theory
An emf of 16 volts is induced in a coil of inductance 4 H. The rate of change of current must be

 64 A / s.
 4 A / s.
 16 A / s.
 32 A / s.

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Electromagnetic Field Theory
Materials subjected to rapid reversals of magnetism should have

 both a and b.
 high permeability.
 low hysteresis loss.
 low permeability.

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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

Absorption
Dispersion
Scattering
Polarisation

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Electromagnetic Field Theory
A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Active satellite
Geostationary satellite
Passive satellite
Orbiting satellite

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