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Electromagnetic Field Theory

Electromagnetic Field Theory
A Yagi antenna has a driven antenna

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

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Electromagnetic Field Theory
Electric field inside a hollow metallic charged sphere is

 none of above.
 decreasing towards centre.
 increasing towards centre.
 zero.

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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

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

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Electromagnetic Field Theory
What is the unit of magnetic charge

 Ampere-meter square.
  Ampere meter.
 Coulomb.
 Ampere.

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Electromagnetic Field Theory
Which of the following impedance inversion is obtained?

A half wave line
Short-circuited stub
A quarter wave line
Balun transformer

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Electromagnetic Field Theory
The energy stored in the magnetic field in a solenoid 10 cm long and 4 cm diameter wound with 2000 turns of wire carrying a current at 20 amp, is

 12 joules.
 15 joules.
 30 joules.
 24 joules.

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MORE MCQ ON Electromagnetic Field Theory

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