Question

For an amplitude modulated wave, the maximum amplitude is found to be $10V$ while the minimum amplitude is found to be $2V$. Find the modulation index, $\mu$.
What would be the value of $\mu$ is the minimum amplitude is zero volt?

Answer 1

$\mu =\frac{V_{max}-V_{min}}{V_{max}+V_{min}}$

Hence, $\mu =\frac{10-2}{10+2}=2/3$

If $V_{min}=0,\mu =0$