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Electromagnetic Field Theory

Electromagnetic Field Theory
The inductance of a long solenoid of length 1000 mm wound uniformly with 3000 turns on a cylindrical paper cable of 60 mm diameter is

 3.2 mH.
 3.2 H.
 3.2 µH.
 32 mH.

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Electromagnetic Field Theory
The attenuation in waveguide above to cut off frequency

Zero
Infinite
Very high
Very low

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Electromagnetic Field Theory
A pure inductor is connected across a voltage source. Find the active power drawn by the inductor?

 maximum
 either 1 or 2
 0
None of these

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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
Parabolic and lens antenna used at

Low frequency
Medium frequency
Microwave frequency
High frequency

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

  – ½.
 – 1/3.
 1/3.
 2/3.

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