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Electromagnetic Field Theory

Electromagnetic Field Theory
For an inductor, current is proportional to

 magnetic field.
 both (A) and (B).
 voltage across the inductor.
 none of them.

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Electromagnetic Field Theory
The principle of dynamically induced emf is utilized in a

 generator.
 transformer.
 thermocouple.
 choke.

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

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

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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

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

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Electromagnetic Field Theory
Find H for centre of solenoid having finite length d = 1 unit where N = no of turns = 500, I = 2 A.

 500.
 1000.
 None of these.
 100.

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Electromagnetic Field Theory
What is the value of skin depth as 100 Hz in a material having μr = 1.0 and & σ = 3.60 × 107 s/m

 10 mm.
 4 mm.
 8.4 mm.
 2.4 mm.

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MORE MCQ ON Electromagnetic Field Theory

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