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Electromagnetic Field Theory

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

 – 1/3.
  – ½.
 1/3.
 2/3.

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Electromagnetic Field Theory
The core of coil length is 200 mm. The inductance of coil is 6 mH. If the core length is doubled, all other quantities, remaining the same, the inductance will be

 3 mH.
 12 mH.
 24 mH.
 48 mH.

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Electromagnetic Field Theory
MUF is highest in periods of greatest sunspot activity.

False
True

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Electromagnetic Field Theory
The useful magnetic flux obtainable from any closed surface is

Both A and B
Unity
None of these
Constant

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Electromagnetic Field Theory
The transmitting antennas for lower frequencies (below 500 kHz) are generally

Horizontal suspended wire type
Vertical grounded wire type
Any of the above
Parabolic reflector type

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Electromagnetic Field Theory
Tropospheric scatter propagation is not subject to any fading.

False
True

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