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Electromagnetic Field Theory

Electromagnetic Field Theory
The power gain of a half-wave dipole with respect to an isotropic radiator is

6 db
3 db
2.15 db
4.15 db

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Electromagnetic Field Theory
Which is the major factor for determining whether a medium is free space, lossless dielectric or a good conductor

 Reflector coefficient.
 Constitutive parameters.
  Loss tangent.
 Attenuation constant.

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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
In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as

Transmission efficiency
None of these
Loss coefficient
Front to back ratio

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Electromagnetic Field Theory
A magnetic circuit requires 800 AT to produce a certain quantity of flux in a magnetic circuit. If its excitation coil has 100 turns and 5 Ohm resistance, the voltage to be applied in exciting coil is

 40 V.
 8 V.
 80 V.
 60 V.

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Electromagnetic Field Theory
The electric field on a plane is decribed by . The field due to

 a dipole.
 a dipole and a monopole.
 none of above.
 a monopole.

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MORE MCQ ON Electromagnetic Field Theory

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