TNPSC Physics MCQ - 2

Question: 6

Radiowaves propagated through the troposphere of the earth are known as

(A) sky wave

(B) space waves

(C) surface waves

(D) ground waves

Question: 7

The RF channel in a radio transmitter produces

(A) low frequency carrier waves

(B) both audio signal and high frequency carrier waves

(C) high frequency carrier waves

(D) audio signals

Question: 8

_____ consists of solid centre conductor surrounded by a plastic insulator, which is further surrounded by a shield by fine wires.

(A) Coaxial cable

(B) Multiconductor flat cable

(C) Twisted pair cable

(D) Both a and b

Question: 9

The antimony trisulphide is a

(A) super conductor

(B) semiconductor

(C) insulator

(D) conductor

Question: 10

The frequency range of Extreme Low Frequencies (ELF) is

(A) 3-30 GHz

(B) 3-30 kHz

(C) 30-300 Hz

(D) 300-3000 Hz