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Electromagnetic Field Theory

Electromagnetic Field Theory
In an inductor current cannot change abruptly. Comment on the statement.

 True.
 True partially.
 Cannot comment.
 False.

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Electromagnetic Field Theory
In order to minimize loss due to hysteresis the magnetic material should have

 small B-H loop area.
 large coercivity.
 high hysteresis coefficient.
 high resistivity.

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Electromagnetic Field Theory
MUF is depend upon

Electron density of the ionospheric layer
Received frequency by receiver
Height of ionospheric layer
11 year sun spot cycle

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Electromagnetic Field Theory
A loop is rotating about x-axis in a magnetic field, B = BO cos(ω + φ) ay. The voltage in the loop is

 Due to transformer only.
 Due to both rotating and transformer action.
 Due to rotating only.
 Zero.

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Electromagnetic Field Theory
The lagging of flux density behind the applied magnetising force is known as

 hysteresis.
 flux.
 permeance.
All of these

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Electromagnetic Field Theory
The frequency of the power wave associated with an electromagnetic wave having field as E = e-z/δ cos(ω - zδ) is given by

 ω/2π.
 ω/4π.
 ω / π.
 ω.

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MORE MCQ ON Electromagnetic Field Theory

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