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Electromagnetic Field Theory

Electromagnetic Field Theory
For an inductor, current is proportional to

 voltage across the inductor.
 none of them.
 magnetic field.
 both (A) and (B).

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Electromagnetic Field Theory
If in a 1 mF capacitor, an instantaneous displacement current of 1 A is to be established in the spaces between its plates then it is possible by applying

 106 volts.
 106 volts/sec.
 106 Amp.
 106 Amp/sec.

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Electromagnetic Field Theory
Which of following is the unit of inductance?

 Ohm.
  Webers / m.
  Ampere turns.
  Milli- henry.

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Electromagnetic Field Theory
A pure inductor when connected across 220 V, 50 Hz supply consumes 100 W. From the above statement it can be concluded that

 the inductor has ferrite core.
 the above statement is false.
 the inductor is non linear.
 the inductor is made of thin wire.

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

Equal to
No relation
Higher than
Less than

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Electromagnetic Field Theory
A plane wave in a homogeneous medium has E = 50 sin(108t + 2z) uy V/m. What is the direction of wave propagation

 – y direction.
 – z direction.
 z direction.
 y direction.

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