Electronics and Communication Engineering - Electromagnetic Field Theory

6. 

MUF is given by

A. fc sec θ
B. fc cos θ
C.
D. fc tan θ

Answer: Option A

Explanation:

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7. 

A waveguide behave as

A. high Pass filter
B. low Pass filter
C. band Pass filter
D. all Pass filter

Answer: Option A

Explanation:

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8. 

Radar antennas are usually

A. dipoles
B. yagi antennas
C. parabolic dishes
D. none of the above

Answer: Option C

Explanation:

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9. 

The radio horizon for space waves is about three-fourth as for as the optical horizon.

A. True
B. False

Answer: Option B

Explanation:

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10. 

Triatics are

A. small height antenna directly mounted on jeeps, ships, etc.
B. the towers or masts which are used as radiators
C. the towers or masts which are not used as radiators
D. supports for antenna conductors.

Answer: Option C

Explanation:

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