Question

The audio signal used to modulate $60$ sin $(2\pi \times {10}^{6}t)$ is $15$ sin $300$ $\pi t$. The depth of modulation is

• A. $50$
• B. $40$
• C. $25$
• D. $15$

Answer 1

The correct option is C $25$

$\mu =\frac{A_m}{A_c}$

$=\frac{15}{60}\times 100$

$=25\%$

Hence,

option $\left(C\right)$ is correct answer.