Q. In frequency modulated wave
A) Frequency varies with time
B) Amplitude varies with time
C) Both frequency and amplitude vary with time
D) Both frequency and amplitude are constant
Explanation
(a) In frequency modulation, frequency of carrier signal varies in accordance with the modulating signal. The amplitude of the carrier wave is fixed while its frequency is changing. When the instantaneous amplitude of the modulating voltage is large, the instantaneous carrier frequency is higher. It is lower when the modulation voltage is small.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.