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Electromagnetic Field Theory

Electromagnetic Field Theory
A medium is said to be isotropic when

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

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Electromagnetic Field Theory
Coulombs law for the force between electric charges most closely resembles with

 Law of conservation of energy.
 Gauss theorem.
 Newtons law of motion.
 Newtons law of gravitation.

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Electromagnetic Field Theory
The two windings of a transformer have an inductor of 2 H each. If mutual inductor between them is also 2 H, then

 transformer is an ideal transformer.
 turns ratio of the transformer is also two.
 none of these.
 it is a perfect transformer.

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

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Electromagnetic Field Theory
As a result of reflection from a plane conducting wall, electromagnetic waves acquire an apparent velocity greater than the velocity of light in space. This is called the

 group velocity.
 normal velocity.
 velocity of propagation.
 phase velocity.

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Electromagnetic Field Theory
The magnitude of the induced emf in a conductor depends upon on the

 flux density of the magnetic field.
 amount of flux cut.
 amount of flux linkage.
 rate of change of flux linkage.

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MORE MCQ ON Electromagnetic Field Theory

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