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Electromagnetic Field Theory

Electromagnetic Field Theory
For an inductor, current is proportional to

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

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Electromagnetic Field Theory
A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?

 0
None of these
 either 1 or 2
 maximum

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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?

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

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Electromagnetic Field Theory
A square corner reflector is used in which of the following?

Radio astronomy
Point-to-point communication
All of these
TV broadcast

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Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is

 450.
 600.
 150.
 300.

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Electromagnetic Field Theory
Conductor is constant and field is varying then emf will be induced. This principle is called

 dynamically induced emf.
 virtually induced emf.
None of these
 static induced emf.

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MORE MCQ ON Electromagnetic Field Theory

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