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Electromagnetic Field Theory

Electromagnetic Field Theory
XEROX machine is working on

 heating effect of current.
 magnetic effect.
 peltier effect.
 electrostatic effect.

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

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

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Electromagnetic Field Theory
Magnetic flux density emerging out of a closed surface is

 depends on magnetic movements inside the closed surface.
 depends on magnetic movements outside the closed surface
 infinite.
 zero.

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Electromagnetic Field Theory
In a lossless medium the intrinsic impedance η = 60π and μr = 1. The relative dielectric constant εr shall be

 4.
 1.
 2.
 8.

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Electromagnetic Field Theory
1 Tesla =

 1 wb/m.
 1 wb .
 1 wb- m2.
 1 wb/ m2.

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Electromagnetic Field Theory
A pure inductor when connected across 220 V, 50 Hz supply consumes 100 W. From the above statement it can be concluded that

 the inductor is made of thin wire.
 the above statement is false.
 the inductor is non linear.
 the inductor has ferrite core.

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MORE MCQ ON Electromagnetic Field Theory

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