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Electromagnetic Field Theory

Electromagnetic Field Theory
A square corner reflector is used in

Tv broadcast
All of these
Point to point communication
Radio astronomy

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Electromagnetic Field Theory
A loop antenna is a commonly used for

Direction finding
Satellite communication
All of these
Radar

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Electromagnetic Field Theory
For a line characteristic impedance zo terminated is load zo/3, the reflection coefficient is

 2/3.
  – ½.
 1/3.
 – 1/3.

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Electromagnetic Field Theory
Magnetic circuit with cross sectional area of 20 cm2 is to be operated at 50 Hz from 120 Vrms supply. The number of turns required to active a peak magnetic flux density of 1.8 T in the core flux is

 450.
 150.
 300.
 600.

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Electromagnetic Field Theory
What is the value of skin depth as 100 Hz in a material having μr = 1.0 and & σ = 3.60 × 107 s/m

 8.4 mm.
 10 mm.
 2.4 mm.
 4 mm.

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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

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

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MORE MCQ ON Electromagnetic Field Theory

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