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Electromagnetic Field Theory

Electromagnetic Field Theory
A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?

 maximum
 either 1 or 2
None of these
 0

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Electromagnetic Field Theory
The useful magnetic flux obtainable from any closed surface is

None of these
Both A and B
Unity
Constant

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Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is

 450.
 300.
 150.
 600.

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Electromagnetic Field Theory
The ability of charged bodies to exert force on one another is attributed to the existence of

 protons.
 electrons.
 electric field.
 neutrons.

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

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

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Electromagnetic Field Theory
When the phase velocity of an EM wave depends on frequency in any medium the phenomenon is called

Absorption
Polarisation
Dispersion
Scattering

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MORE MCQ ON Electromagnetic Field Theory

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