Question
Physics Question on communication systems
Modulation is the process of superposing
A
low frequency audio signal on high frequency waves
B
low frequency radio signal on low frequency audio waves
C
high frequency radio signal on low frequency audio signal
D
high frequency audio signal on low frequency radio waves
Answer
low frequency audio signal on high frequency waves
Explanation
Solution
Low frequency audio signal cannot be transmitted as such over long distances. Therefore. to overcome this difficulty, the low frequency audio signal is superposed on a high frequency wave ( carrier wave). This process is called modulation.