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Electromagnetic Field Theory

Electromagnetic Field Theory
A Yagi antenna has a driven antenna

With one or more directors
With a reflector
With a reflector and one or more directors
Only

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Electromagnetic Field Theory
Tropospheric scatter is used with frequencies in the

HF
UHF
VHF
VLF

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Electromagnetic Field Theory
In above question no. 9, the average force on the core to reduce the air gap will be

 832.29 N.
 1666.22 N.
 6664.8 N.
 3332.47 N.

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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 force on a charge moving with velocity v under the influence of electric and magnetic fields is given by which one of the following

 q(E + B × V).
 q(H + V × E).
 q(E +V × H).
 q(E + V × B).

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Electromagnetic Field Theory
Which of following is not a unit of flux?

 Maxwell.
 Weber.
 All of above.
 Telsa.

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