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Electromagnetic Field Theory

Electromagnetic Field Theory
XEROX machine is working on

 peltier effect.
 heating effect of current.
 magnetic effect.
 electrostatic effect.

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Electromagnetic Field Theory
In an iron core coil the iron core is removed so that the coil becomes an air core coil. The inductance of the coil will

 decrease.
 initially increase and then decrease.
 remain the same.
 increase.

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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

Front to back ratio
None of these
Transmission efficiency
Loss coefficient

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Electromagnetic Field Theory
If the static magnetic flux density is B, then

 Curl of B = J.
 Curl of B = 0.
 Divergence of B = J.
  Divergence of B = 0.

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Electromagnetic Field Theory
Parabolic and lens antenna used at

Microwave frequency
High frequency
Low frequency
Medium frequency

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Electromagnetic Field Theory
Which of the following is multiband HF receiving antenna?

Square loop
Folded dipole
Log-periodic
Conical horn

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MORE MCQ ON Electromagnetic Field Theory

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