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Electromagnetic Field Theory

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

Higher than
Equal to
No relation
Less than

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Electromagnetic Field Theory
When a current carrying conductor is brought into magnetic field, the force that moves the conductor depends upon

The direction of the conductor
The weight of the conductor
The value of current
None of these

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Electromagnetic Field Theory
A magnetic circuit requires 800 AT to produce a certain quantity of flux in a magnetic circuit. If its excitation coil has 100 turns and 5 Ohm resistance, the voltage to be applied in exciting coil is

 80 V.
 60 V.
 40 V.
 8 V.

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

 static induced emf.
None of these
 dynamically induced emf.
 both A and B.

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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

 40 nj.
 60 nj.
 20 nj.
 100 nj.

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

 False.
 True partially.
 Cannot comment.
 True.

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MORE MCQ ON Electromagnetic Field Theory

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