Question
Physics Question on Phasor diagrams
The maximum amplitude of an amplitude-modulated wave is found to be 15V while its minimum amplitude is found to be 3V. The modulation index is:
Answer
Explanation:
Given: Ac+Am=15 and Ac-Am=3
Therefore, Ac=9 and Am=6
So, m=AmAc=69=23 [where m=modulation index]
Hence, the correct answer is 23.