NEET UG PHYSICS MCQ: COMMUNICATION SYSTEMS

1 Medium

1 of 1

Understanding +4 | -1

In satellite communication, the communication satellite;

View answer and explanation

Correct option: C

Receives the coming modulated microwave signal, amplifies it and returns it to earth at a different frequency

Option C (Receives the coming modulated microwave signal, amplifies it and returns it to earth at a different frequency) is correct because a communication satellite acts as a repeater, amplifying and retransmitting the signal at a different frequency to avoid interference.

More Questions from COMMUNICATION SYSTEMS

Practice All Chapter MCQs →

In the communication systems, AM is used for broadcasting because The maximum and minimum voltage of an amplitude modulated signal are

60 \mathrm{~V}

and

20 \mathrm{~V}

respectively. The percentage modulation index will be: Depth of modulation

\left( {{m_a}} \right)

in terms of

{{\text{E}}_{{\text{max}}}}\,{\text{and}}\,{{\text{E}}_{{\text{min}}}}

is The process of superimposing signal frequency (i.e., audio wave) on the carrier wave is known as The antenna current of an AM transmitter is 8 A when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by single sine wave. Find the percentage modulation. An audio signal of amplitude one half the carrier amplitude is used in amplitude modulation. Calculate the modulation index?