TNPSC Physics MCQ - 1

Question: 1

High frequency waves follow

(A) the curvature of the earth

(B) ionospheric propagation

(C) the line of sight direction

(D) the ground wave propagation

Question: 2

Modulation is a process of superimposing audio signal with

(A) high frequency waves

(B) low frequency waves

(C) medium frequency waves

(D) voice frequency waves

Question: 3

_____ has made communication still more widespread with an increasing emphasis on computer and other data communication.

(A) Electronic valves and transistors

(B) Satellites and fibre optics

(C) Transistors and semiconductor devices

(D) Transistors and integrated circuits

Question: 4

A satellite in space links many earth stations. The user is connected to the earth station through

(A) terrestrial network

(B) de-emphasis network

(C) special network

(D) pre-emphasis network

Question: 5

Coherent light may be detected by

(A) light emitting diode

(B) zener diode

(C) photo diode

(D) PN junction diode