The signal is aff ected by noise in a communication system _____________.

(a)

At the transmitter

(b)

At the modulator

(c)

In the channel

(d)

At the receiver

The frequency range of 3 MHz to 30 MHz is used for ______.

(a)

Ground wave propagation

(b)

Space wave propagation

(c)

Sky wave propagation

(d)

Satellite communication

In a video signal for transmission of picture what value of bandwidth is used in communication system?

(a)

2.4 MHz

(b)

4:2 MHz

(c)

24MHz

(d)

42 MHz

Which of the following is an example of breadcast made of communication?

(a)

Radio

(b)

Television

(c)

Mobile

(d)

both (a) & (b)

The radio waves of frequency 30 MHz to 300 MHz belong to _______________.

(a)

high frequency band

(b)

very high frequency band

(c)

ultra high frequency band

(d)

super high frequency band

Distinguish between wireline and wireless communication? Specify the range of electromagnetic waves in which it is used.

Explain centre frequency or resting frequency in frequency modulation.

What does RADAR stand for?

What is mobile communication?

Write the function of Repeater.

Explain the ground wave propagation and space wave propagation of electromagnetic waves through space.

Give the applications of lCT in mining and agriculture sectors.

Fiber optic communication is gaining popularity among the various transmission media -justify.

Explain why TV transmission towers made high.

What does the term LOS communication mean? Name the types of waves that are used for this communication. What is the range of their frequency?

Write the applications of mobile communication.

What is meant by satellite communication? Give its applications.