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Electromagnetic Field Theory

Electromagnetic Field Theory
In a lossless medium the intrinsic impedance η = 60π and μr = 1. The relative dielectric constant εr shall be

 2.
 4.
 1.
 8.

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Electromagnetic Field Theory
A medium is said to be isotropic when

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

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

Phase shifter
An attenuator
None
An isolator

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Electromagnetic Field Theory
A loop is rotating about x-axis in a magnetic field, B = BO cos(ω + φ) ay. The voltage in the loop is

 Zero.
 Due to both rotating and transformer action.
 Due to rotating only.
 Due to transformer only.

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Electromagnetic Field Theory
A sphere of radius with a uniform charge density ρv C/m3 shall have electric flux density at radius “r = a” equal to

 aρv/4 C/m2.
 ρv/3 C/m2.
 aρv/3 C/m2.
 aρv C/m2.

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Electromagnetic Field Theory
In case of all flux from the current in coil 1 links with coil 2, the coefficient of coupling will be

 1.0.
 2.0.
 0.5.
 Zero.

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MORE MCQ ON Electromagnetic Field Theory

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