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Electromagnetic Field Theory

Electromagnetic Field Theory
Ohm’s law in point from field theory can be expressed as

 R = ρ × ( l / A).
 J = σE.
 J = E / σ.
 V = IR.

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

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

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 10 cm long and 4 cm diameter wound with 2000 turns of wire carrying a current at 20 amp, is

 12 joules.
 15 joules.
 30 joules.
 24 joules.

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Electromagnetic Field Theory
The radiation pattern of a parabola antenna is

Highly directional
None of these
Omnidirectional
A figure of directional

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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
Two infinite parallel metal plates are charged with equal surface charge density of the same polarity. The electric field in the gap between the plates is

 zero.
 double the field produced by one plate.
 dependent on coordinates of field points.
 same as that produced by one plate.

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MORE MCQ ON Electromagnetic Field Theory

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