M

Mr. Dubey • 52.70K Points
Coach 

Q.                    is a device that converts electrons to photons or vice-versa.

(A) antenna
(B) electron gun
(C) photon amplifier
(D) microwave tube
Share
Explanation by: Mr. Dubey 
 antenna is a device that converts electrons into photons or vice versa. a transmitting antenna converts electrons into photons while a receiving antenna converts photons into electrons.

You must be Logged in to update hint/solution

Discusssion

Login to discuss.

Be the first to start discuss.

Related MCQs

Q. Colpitts oscillator operating at 50 MHz has an inductor in the feedback section of value 0.10µH. then the values of the capacitors in the feedba

Q. Which factor adds phase noise to the signal?

Q. Phase lag controller:

Q. In series motor which of the following methods can be used for changing the flux per pole ?

Q. The motor normally used for crane travel is

Q. In D.C. generators the polarity of the interpoles

Q. Error detector:

Q. The advantage of oil filled cables is

Q. Insertion of negative feedback in control system affects:

Q. A flute sounds different than a violin, even if the two instruments are played at the same pitch, because of a difference in the

Question analytics