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Electromagnetic Field Theory

Electromagnetic Field Theory
The core of coil length is 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be

 3 mH.
 12 mH.
 48 mH.
 24 mH.

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Electromagnetic Field Theory
A square corner reflector is used in

Radio astronomy
Point to point communication
Tv broadcast
All of these

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Electromagnetic Field Theory
Electric field intensity (E) at ant point in an electric field is equal to

 (potential gradient)1/3.
 (potential gradient)1/2.
 potential gradient.
 (potential gradient)2.

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Electromagnetic Field Theory
Electric field strength of charge

 Decrease with distance.
 Increase distance.
 Increase square distance.
 Decrease with square distance.

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Electromagnetic Field Theory
Materials subjected to rapid reversals of magnetism should have

 both a and b.
 low permeability.
 low hysteresis loss.
 high permeability.

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Electromagnetic Field Theory
Which of the following represents ohms law

 V = RI
 I = GV
All of these
 J = σE

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MORE MCQ ON Electromagnetic Field Theory

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