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Electromagnetic Field Theory
The heating time constant of an electrical machine gives an indication of its
short time rating.
cooling.
overload capacity.
rating.
short time rating.
cooling.
overload capacity.
rating.
Answer
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Related Question
Electromagnetic Field Theory
A point pole has a strength of 4π × 10-4 weber. The force in newtons on a point pole of 4π × 1.5 × 10-4 weber placed at a distance of 10 cm from it will be
7.5 N.
15 N.
20 N.
3.75 N.
7.5 N.
15 N.
20 N.
3.75 N.
Answer
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Electromagnetic Field Theory
A point charge in space is attracted towards a dielectric material because of the
dielectric hysteresis.
phenomenon of dielectric polarisation.
maximisation of electrostatic flux.
all of above.
dielectric hysteresis.
phenomenon of dielectric polarisation.
maximisation of electrostatic flux.
all of above.
Answer
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Electromagnetic Field Theory
Tropospheric scatter propagation is not subject to any fading.
False
True
False
True
Answer
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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
4 A / s.
64 A / s.
16 A / s.
32 A / s.
4 A / s.
64 A / s.
16 A / s.
32 A / s.
Answer
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Electromagnetic Field Theory
In a lossless medium the intrinsic impedance η = 60π and μr = 1. The relative dielectric constant εr shall be
1.
8.
4.
2.
1.
8.
4.
2.
Answer
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