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Electromagnetic Field Theory

Electromagnetic Field Theory
The ability of charged bodies to exert force on one another is attributed to the existence of

 protons.
 electrons.
 electric field.
 neutrons.

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Electromagnetic Field Theory
The energy stored in the magnetic field at a solenoid 30 cm long and 3 cm diameter wound with 1000 turns of wire carrying an current at 10 A, is

 0.15 J.
 1.15 J.
 0.5 J.
 0.015 J.

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Electromagnetic Field Theory
Parabolic and lens antenna used at

Medium frequency
High frequency
Low frequency
Microwave frequency

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

Conical horn
Folded dipole
Square loop
Log-periodic

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Electromagnetic Field Theory
A sphere of 20 cm radius contains electrical charge of density 2/(r sinθ) c/m3. What is the total charge contained within the sphere?

 0.335 C.
 0.335/sinθ c.
 0.
 None of above.

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Electromagnetic Field Theory
A waveguide operated below cut off frequency can be used as

An isolator
Phase shifter
An attenuator
None

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MORE MCQ ON Electromagnetic Field Theory

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