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Electromagnetic Field Theory

Electromagnetic Field Theory
How much current must flow in a loop of radius 1m to produce a magnetic field of 1 mA/m?

 2 mA.
 2.5 mA.
 1.5 mA.
 1mA.

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Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally

Horizontal suspended wire type
Any of the above
Parabolic reflector type
Vertical grounded wire type

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Electromagnetic Field Theory
Mutual inductance between two magnetically coupled coils depends on

 the number of their turns.
 cross sectional area of their common core.
 permeability of core.
 all of above.

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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

 8 V.
 80 V.
 40 V.
 60 V.

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Electromagnetic Field Theory
The emf induced in a conductor rotating in bipolar field is

 DC.
 none of these.
 DC and AC both.
 AC.

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Electromagnetic Field Theory
The property of the coil by which a counter emf is induced in it when the current through the coil changes is known as

 capacitance.
 series aiding inductance.
 self inductance.
 mutual inductance.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electromagnetic Field Theory

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