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Electromagnetic Field Theory

Electromagnetic Field Theory
A square corner reflector is used in

Point to point communication
Tv broadcast
Radio astronomy
All of these

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

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

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Electromagnetic Field Theory
1 Tesla =

 1 wb/ m2.
 1 wb/m.
 1 wb .
 1 wb- m2.

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

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

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Electromagnetic Field Theory
The Kirchhoff’s current law is implict in expression

 Curl of H = J + (δ D)/(δ t).
 Divergence of B = 0.
  Surface integral of (j.ds) = 0.
 Divergence of D = ρv.

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Electromagnetic Field Theory
The critical frequency of ‘F’ layer is greater than 30 MHz.

True
False

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