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Electromagnetic Field Theory

Electromagnetic Field Theory
A square corner reflector is used in

All of these
Tv broadcast
Radio astronomy
Point to point communication

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Electromagnetic Field Theory
The magnetic vector potential due to a single conductor carrying current is

 infinite.
 finite.
 zero.
 none of tha above.

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Electromagnetic Field Theory
It is best to use for coupling a coaxial line to a parallel wire transmission line.

Balun
Slotted line
Directional Coupler
Tee

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Electromagnetic Field Theory
The main purpose of choke is

 to pass high frequencies.
 to block low frequencies.
  to pass low frequencies.
 none of above.

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Electromagnetic Field Theory
The divergence of a vector is a scalar, while the curl of a vector is another

Unit vector
Scalar
Vector
None of these

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Electromagnetic Field Theory
A rectangular loop in the x – z plane bounded by the lines x = 0, x = a, z = 0 and z = b is in a time varying magnetic field is given by B = B0 cosωt + ay. Where B0 is constant, ω is angular frequency and ay unit vector in the y direction. Now the emf induced in the loop is given by

 ab Bo cosω t.
 Zero.
  abω Bo sinω t.
 Bo ω sinω t.

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MORE MCQ ON Electromagnetic Field Theory

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