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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?

 0
None of these
 maximum
 either 1 or 2

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Electromagnetic Field Theory
Between a hollow and solid metal sphere, charge reside

 on outer surface in hollow and throughout in solid.
 on outer surface in both.
 None of above.
 on outer surface in hollow and throughout in solid

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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.

 145.
 250.
 225.
 150.

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Electromagnetic Field Theory
Tropospheric scatter propagation is not subject to any fading.

True
False

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Electromagnetic Field Theory
Voltage applied across a dielectric produces an electrostatic field 50 times greater than air. The dielectric constant of the dielectric will be

 20.
 5.
 10.
 50.

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

Constant
Both A and B
Unity
None of these

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