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Electromagnetic Field Theory

Electromagnetic Field Theory
A medium is said to be isotropic when

 ∈ is zero.
 ∈ = μσ.
 ∈ = μ.
 ∈ is a scalar constant.

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

True
False

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Electromagnetic Field Theory
A square corner reflector is used in

Point to point communication
Radio astronomy
All of these
Tv broadcast

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Electromagnetic Field Theory
An infinite sheet has a charge density of 150 μ C/m. The flux density in μ C/m 2 is

 75.
 100.
 50.
 1/75.

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Electromagnetic Field Theory
The drawback of Daltons atomic structure is that, it says

 the atoms can neither be created nor be destroyed.
 unique nature of atom.
 most of the volume of an atom is empty space.
 none of these.

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