Q83 / 90 · JEE Main 2021 (25 Jul Shift 2) · Physics

A message signal of frequency $20 kHz$ and peak voltage of $20$ $V$ is used to modulate a carrier wave of frequency $1 MHz$ and peak voltage of $20$ $V$ . The modulation index will be:

Correct answer: 1

Solution

Modulation index

$μ = \frac{A_{m}}{A_{c}} = \frac{20}{20} = 1$

Hence, the correct answer is 1.

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