M

Mr. Dubey • 52.30K Points
Coach

Q.                          is a microwave device in which the frequency of operation is determined by the biasing field strength.

(A) vtm
(B) gyratron
(C) helix bwo
(D) none of the mentioned
Correct : Option (B)

Explanation:
 gyratron is a microwave device in which the frequency of operation is determined by the biasing field strength and the electron velocity, as opposed to the dimensions of the tube itself. this makes the gyrator especially useful for microwave frequencies.

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