1000+ Physics Questions and Answers for Competitive Exams - 2

Question: 6

In monochrome TV transmitter, the picture carrier frequency is generated by

(A) travelling wave tube

(B) crystal controlled oscillator

(C) magnetron oscillator

(D) klystron amplifier

Question: 7

A channel is a _____ assigned to a particular broadcast station for transmission.

(A) frequency

(B) group of wavelength

(C) wavelength

(D) group of frequencies

Question: 8

In phase modulation, the rate of variation of phase of carrier wave is proportional to the

(A) carrier amplitude

(B) signal amplitude

(C) carrier frequency

(D) signal frequency

Question: 9

The satellite that appears to be stationary at a given spot above the equator is called

(A) geostationary satellite

(B) polar satellite

(C) navigation satellite

(D) remote sensing satellite

Question: 10

The principle used for the transmission of light signals through the optical fiber is

(A) scattering

(B) diffraction

(C) total internal reflection

(D) interference