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JEE Mains 1 Feb 2023 Shift 2 Paper

Section: Physics

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Question : 5 of 90

Marks: +1, -0

In an amplitude modulation, a modulating signal having amplitude of

X V

is superimposed with a carrier signal of amplitude

Y V

in first case. Then, in second case, the same modulating signal is superimposed with different carrier signal of amplitude

2 Y V

. The ratio of modulation index in the two case respectively will be:

[1-Feb-2023 Shift 2]

$1: 2$
$1: 1$
$2: 1$
$4: 1$

Solution:

Modulating Index

\mu = \frac{A_m}{A_c}

\mu_1 = \frac{X}{Y}

\mu_2 = \frac{X}{2Y}

\frac{\mu_1}{\mu_2} = \frac{2}{1}

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