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Electromagnetic Field Theory

Electromagnetic Field Theory
The attenuation in waveguide above to cut off frequency

Zero
Very low
Infinite
Very high

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Electromagnetic Field Theory
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V.

 0.5m.
 0.6m.
 5.25m.
 6.25m.

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Electromagnetic Field Theory
What is the value of magnetic vector potential due to an infinitesimally small current element, evaluated at infinite distance from it?

 Zero.
 Infinity.
 Depends on strength of current element.
 Unity.

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Electromagnetic Field Theory
When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .

Refraction
None of these
Reflection
Transmission

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Electromagnetic Field Theory
A loop antenna is a commonly used for

Radar
All of these
Satellite communication
Direction finding

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Electromagnetic Field Theory
A conductor of length 1 metre moves at right angles to magnetic field of flux density 1 Wb/m2 with a velocity of 25 m/s. The induced emf in the conductor will be

 100 V.
 25 V.
 50 V.
 75 V.

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MORE MCQ ON Electromagnetic Field Theory

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