Question

For an amplitude modulated wave, if the maximum amplitude is \(400%\) more than its minimum amplitude, then the modulation index is

• A. \(\frac{3}{4}\)
• B. \(1\)
• C. \(\frac{2}{3}\)
• D. \(\frac{1}{2}\) \bigskip

Hint:

For AM waves: \[ m=\frac{A_{\max}-A_{\min}} {A_{\max}+A_{\min}} \] If \(A_{\max}=5A_{\min}\), immediately remember that \[ m=\frac{5-1}{5+1}=\frac{2}{3}. \]

Answer 1

The Correct Option is C