set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Space wave propagation is:

1. tropospherical propagation
2. sky wave propagation
3. line of sight propagation

a) 1 and 3

b) 2 only

c) 1 only

d) 2, 3 and 4

Question : 2

Which of the following cannot be fabricated on an IC?

a) Inductors and transformers

b) Diodes

c) Transistors

d) Resistors

Question : 3

The transistor are usually made of

a) metals with high temperature coefficient of resistivity

b) metals with low temperature coefficient of resistivity

c) metal oxides with high temperature coefficient of resistivity

d) semiconducting materials having low temperature coefficient of resistivity

Question : 4

Light Emitting Diode (LED) converts

a) electrical energy into light energy

b) thermal energy into light energy

c) light energy into electrical energy

d) mechanical energy into electrical energy

Question : 5

In frequency modulation:

a) The frequency of modulated wave varies as amplitude of modulating wave

b) The amplitude of modulated wave varies as amplitude of carrier wave

c) The amplitude of modulated wave varies as frequency of carrier wave

d) The frequency of modulated wave varies as frequency of modulating wave.

Question : 6

The service area of space wave communication increases by –

a) Decreasing the height of receiving antenna

b) Increasing the height of both transmitting and receiving antenna

c) Increasing the height of transmitting antenna

d) Decreasing the distance between transmitting and receiving antenna