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Electromagnetic Field Theory

Electromagnetic Field Theory
The skip distance is the maximum distance upto which ionospheric reflection is possible.

True
False

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Electromagnetic Field Theory
Which of this statement is not characteristic of a static magnetic field

 it has no sink or sources.
 it is conservative.
 magnetic flux lines are always closed.
 it is solenoidal.

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Electromagnetic Field Theory
The force experienced by a current carrying conductor lying parallel to a magnetic field is

 zero.
 BIL.
 Bil cosθ.
 Bil sinθ.

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Electromagnetic Field Theory
The main disadvantage of the two-hole directional coupler is

High standing wave ratio
Low directional coupling
Narrow bandwidth
Poor directivity

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Electromagnetic Field Theory
An emf of 16 volts is induced in a coil of inductance 4 H. The rate of change of current must be

 64 A / s.
 32 A / s.
 4 A / s.
 16 A / s.

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

Constant
None of these
Unity
Both A and B

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MORE MCQ ON Electromagnetic Field Theory

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