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Electromagnetic Field Theory

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

Equal to
No relation
Less than
Higher than

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Electromagnetic Field Theory
A satellite that simply reflect back the signals from one region of the earth to the other region is known as

Geostationary satellite
Orbiting satellite
Passive satellite
Active satellite

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Electromagnetic Field Theory
A magnetic material has a total flux B of 80 micro Wb with an mmf of 160 AT. The reluctance in ampere turn per weber is

 2 × 106.
 2 × 10-8.
 2 × 10-6.
 2 × 108.

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Electromagnetic Field Theory
Coulombs law for the force between electric charges most closely resembles with

 Newtons law of motion.
 Gauss theorem.
 Newtons law of gravitation.
 Law of conservation of energy.

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Electromagnetic Field Theory
In above problem, if the inductance L1 and L2 in series aiding with 30 mH mutual inductance, then total inductance will be

 150 mH.
 200 mH.
 50 mH.
 100 mH.

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Electromagnetic Field Theory
Two coils have inductances L1 = 1200 mH and L2 = 800 mH. They are connected in such a way that flux in the two coils aid each other and inductance is measured to be 2500 mH, then Mutual inductance between the coils is ___________ mH.

 225.
 145.
 150.
 250.

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MORE MCQ ON Electromagnetic Field Theory

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