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Electromagnetic Field Theory

Electromagnetic Field Theory
For an inductor, current is proportional to

 voltage across the inductor.
 none of them.
 magnetic field.
 both (A) and (B).

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Electromagnetic Field Theory
Two straight parallel conductors carry equal currents in opposite direction. The force between them is

 attractive.
 none of above.
 zero.
 repulsive.

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Electromagnetic Field Theory
The main disadvantage of the two-hole directional coupler is

Narrow bandwidth
Low directional coupling
Poor directivity
High standing wave ratio

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Electromagnetic Field Theory
The critical frequency of ‘F’ layer is greater than 30 MHz.

False
True

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Electromagnetic Field Theory
The divergence of a vector is a scalar, while the curl of a vector is another

None of these
Vector
Unit vector
Scalar

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Electromagnetic Field Theory
The work done by a force F = 4un - 3uy + 2uz N in giving a 1nC charge a displacement of (10 ux + 2uy - 7uz) m is

 20 nj.
 40 nj.
 60 nj.
 100 nj.

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MORE MCQ ON Electromagnetic Field Theory

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