Question

Which one of the following is a way to produce a signal?

(a) Superimposition with a carrier signal

(b) Superimposition with a received signal

(c) Superimposition with a transmitted signal

(d) No superimposition is required

This question was posed to me during an internship interview.

Enquiry is from Communication Systems topic in chapter Communication Systems of Physics – Class 12

Answer 1

Correct choice is (a) Superimposition with a carrier signal

The best I can explain: Any signal that is generated from a source and is required to be sent over large distances from the source to the receiver, needs to be modified. This can be achieved by superimposition with a carrier signal in order to ensure that the signal is transmitted in a suitable bandwidth.