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Mr. Dubey • 52.30K Points
Coach 

Q. Which of the following antennas produce a vertical radiation pattern?

(A) dipole antenna
(B) yagi antenna
(C) marconi antenna
(D) hertz antenna
Correct : Option (C)

Explanation: 
 the same effect as dipole antenna can be achieved with a one-quarter wavelength antenna or marconi antenna. a vertical dipole with the doughnut-shaped radiation pattern, in which one-half of the pattern is below the surface of the earth. this is called a vertical radiation pattern.

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