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Electromagnetic Field Theory

Electromagnetic Field Theory
Which of the following is zero in relation to electromagnetic fields?

 Curl curl A.
 Div grad V.
 Div curl A.
 Grad div A.

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Electromagnetic Field Theory
The two windings of a transformer have an inductor of 2 H each. If mutual inductor between them is also 2 H, then

 it is a perfect transformer.
 none of these.
 transformer is an ideal transformer.
 turns ratio of the transformer is also two.

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Electromagnetic Field Theory
Radiation intensity in a given direction is the

None of these
Power radiated per unit solid angle in that direction
Power radiated per square metre
Energy radiated per square metre

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Electromagnetic Field Theory
The Biot-savarts law is a general modification of

 Lenzs law.
 Kirchhoffs law.
 Faradays law.
 Amperes law.

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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 inductor has ferrite core.
 the inductor is non linear.
 the above statement is false.

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Electromagnetic Field Theory
In a perfect conductor the incident and reflected wave combine to produce

A stronger reflected wave
A standing wave which is not progressing
A stronger incident wave
None of these

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