JEE Main · PhysicsEasy

$A message signal of frequency f_{m} = 10 kHz and peak voltage A_{m} = 10 V is used to modulate a carrier wave of frequency f_{c} = 1 MHz and peak voltage A_{c} = 20 V . The modulation index is:$

A. $0.5$
B. $0.2$
C. $0.1$
D. $2.0$

Show correct answer & step-by-step solution

Correct answer: A — $0.5$

Solution

$The modulation index μ is defined as μ = \frac{A _{m}}{A _{c}} .$
$Given A_{m} = 10 V and A_{c} = 20 V .$
$Substituting the values, μ = \frac{10}{20} = 0.5 .$
$Hence the answer is (A).$

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A message signal of frequency 10 kHz and peak voltage of 10 V is used to modulat… — JEE Main Physics Question with Solution | Solv