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Electromagnetic Field Theory

Electromagnetic Field Theory
If n is the polarization vector and k is the direction of propagation plane electromagnetic wave, then

 n × k = 0.
 n. k = 0.
 n = - k.
 n = K.

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Electromagnetic Field Theory
In H-plane metal plate lens the travelling wave front is

Retarded
Neither accelerated nor retarded
Totally retarded
Accelerated

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Electromagnetic Field Theory
Two coils are coupled in such a way that the mutual inductance between them is 20 mH. If the inductances of the coils are 40 mH and 50 mH respectively, the coefficient of coupling is

 0.477.
 0.447.
 0.577.
 0.01.

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Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 3.2 H.
 3.2 µH.
 32 mH.
 3.2 mH.

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Electromagnetic Field Theory
The shape of B-H curve for air gap is

 hyperbola.
 parabola.
 straight line.
 ellipse.

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Electromagnetic Field Theory
A waveguide operated below cut off frequency can be used as

An attenuator
Phase shifter
An isolator
None

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MORE MCQ ON Electromagnetic Field Theory

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