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Electromagnetic Field Theory

Electromagnetic Field Theory
A loop antenna is a commonly used for

Radar
Satellite communication
All of these
Direction finding

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Electromagnetic Field Theory
The magnetic field at any point on the axis of current carrying circular coil will be

 perpendicular to axis.
 at an angle 45o with the axis.
 zero.
 parallel to axis.

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Electromagnetic Field Theory
An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz supply. Neglected coil resistance, core loss, iron reluctance and leakage inductance. Find the current in the inductor.

 2.28 A.
 18.08 A.
 9.04 A.
 4.56 A.

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Electromagnetic Field Theory
An electric field on a place described by its potential V = 20 (r -1 + r-2) where r is the distance from the source. The field is due to

 Both of A and B.
 A dipole.
 A quardra pole.
 A monopole.

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Electromagnetic Field Theory
The virtual height of an ionospheric layer is __________ true height

Equal to
Higher than
No relation
Less than

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

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

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MORE MCQ ON Electromagnetic Field Theory

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