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  4. In the case of amplitude modulation to avoid distortion the modulation index (μ) should be:

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Q. In the case of amplitude modulation to avoid distortion the modulation index $(\mu)$ should be:

JEE MainJEE Main 2022Communication Systems

Solution:

$ \mu=\frac{ A _{ m }}{ A _{ c }}$
$\mu \leq 1 $ to avoid distortion
because $\mu >1$ will result in interference between career frequency & message frequency.