Question

Why is AM used for broadcasting in the communication systems?

(a) Its use avoids receiver complexity

(b) It is more noise immune than other modulation systems

(c) It requires less transmitting power

(d) No other modulation system can give the necessary bandwidth for faithful transmission

The question was posed to me in a job interview.

Asked question is from Communication Systems topic in portion Communication Systems of Physics – Class 12

Answer 1

Right option is (b) It is more noise immune than other modulation systems

The explanation is: In the communication systems, amplitude modification is used for broadcasting because its use avoids receiver complexity. Only a diode and a capacitor are sufficient to separate the audio signal from the amplitude modified wave.