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Electromagnetic Field Theory

Electromagnetic Field Theory
The potential that appears at a point in space due to the current which caused it is called potential

Lagging the current
Oscillating
Retardation
Accelerating

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Electromagnetic Field Theory
Two coupled coils with L1 = L2 = 0.6 H have a coupling coefficient of K = 0.8. The turns ratio N1/N2 is

 2.
 0.5.
 4.
 1.

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Electromagnetic Field Theory
In case of surface waves the field strength at a point is directly proportional to

Antenna height
Wave frequency
Current of the antenna
Distance of the point from the antenna

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

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

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Electromagnetic Field Theory
If the resistance of a conductor does not vary in accordance with the Ohms law it is known as

 reverse conductor.
 non - conductor.
 non - linear conductor.
 bad conductor.

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Electromagnetic Field Theory
Two point charges (Q and – Q) are situated at the vertex of the square. If potential at another vertex is 2 V, so potential at opposite vertex (diagonally) is

 √ 2 V.
 Zero.
  2 V.
 1 V.

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MORE MCQ ON Electromagnetic Field Theory

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