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Electromagnetic Field Theory

Electromagnetic Field Theory
A medium is said to be isotropic when

 ∈ = μ.
 ∈ is zero.
 ∈ is a scalar constant.
 ∈ = μσ.

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Electromagnetic Field Theory
In frec space E (z,t) = 103 sin(ωt - βz) uy v/m. What is the value of H (z,t)

 (103/377) cos(ωt - β z)(-ux) A/m.
  (103/377) sin(ωt - β z)(-ux) A/m.
 (103/377) sin(ωt - β z)(-uy) A/m.
 None of above.

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 zero.
 BIL.
 Bil cosθ.
 Bil sinθ.

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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

Loss coefficient
None of these
Front to back ratio
Transmission efficiency

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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

 32 A / s.
 64 A / s.
 16 A / s.
 4 A / s.

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

Infinite
Very high
Very low
Zero

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MORE MCQ ON Electromagnetic Field Theory

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