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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.
20 N.
3.75 N.
15 N.
7.5 N.
20 N.
3.75 N.
15 N.
Answer
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Related Question
Electromagnetic Field Theory
Radiation intensity in a given direction is the
Power radiated per unit solid angle in that direction
None of these
Power radiated per square metre
Energy radiated per square metre
Power radiated per unit solid angle in that direction
None of these
Power radiated per square metre
Energy radiated per square metre
Answer
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Electromagnetic Field Theory
In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as
None of these
Transmission efficiency
Front to back ratio
Loss coefficient
None of these
Transmission efficiency
Front to back ratio
Loss coefficient
Answer
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Electromagnetic Field Theory
The skip distance is the maximum distance upto which ionospheric reflection is possible.
True
False
True
False
Answer
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Electromagnetic Field Theory
Which of the following statement is correct for divergence of electric and magnetic flux densities?
It is zero for the magnetic flux density.
Both are zero.
These are zero for static densities but non zero for time varying densities.
It is zero for the electric flux density.
It is zero for the magnetic flux density.
Both are zero.
These are zero for static densities but non zero for time varying densities.
It is zero for the electric flux density.
Answer
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Electromagnetic Field Theory
A point charge in space is attracted towards a dielectric material because of the
phenomenon of dielectric polarisation.
maximisation of electrostatic flux.
all of above.
dielectric hysteresis.
phenomenon of dielectric polarisation.
maximisation of electrostatic flux.
all of above.
dielectric hysteresis.
Answer
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