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Electromagnetic Field Theory

Electromagnetic Field Theory
If a and b are the dimensions of waveguide then

a = 3b
a = b/4
a = b
a = 2b

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Electromagnetic Field Theory
An insulated metal sphere of 20 cm diameter is charged by rubbing with charges 2 × 10-8 C. Potential developed will be

 900 V.
 200 V.
 0 V.
 1800 V.

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Electromagnetic Field Theory
Cork Screw rule is used to find

 direction of magnetic field.
 direction of electric field.
 direction of emf.
 direction of current.

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Electromagnetic Field Theory
Which of the following will increase the antenna radiation efficiency?

Providing insulation on conductor
Top loading of antenna
Use of larger section of conductor
Any of the above

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Electromagnetic Field Theory
In H-plane metal plate lens the travelling wave front is

Retarded
Totally retarded
Neither accelerated nor retarded
Accelerated

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Electromagnetic Field Theory
A circular loop has its radius increasing at a rate of 2 m/s. The loop placed perpendicular to a constant magnetic field of 0.5 wb/m2. When the radius of the loop is 4 m. the emf induced in the will be

 0.4 π V.
 Zero.
 0.8 π V.
 8 π V.

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MORE MCQ ON Electromagnetic Field Theory

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