Question:medium

If the peak voltage of message signal is \(60\%\) less than the peak voltage of the carrier wave, then the modulation index is

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For amplitude modulation, \[ \boxed{ m=\frac{V_m}{V_c}. } \] If the message signal is \(x\%\) of the carrier signal, then \[ \boxed{ m=\frac{x}{100}. } \]

Updated On: Jul 18, 2026

\(0.3\)
\(0.4\)
\(0.6\)
\(0.2\)

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The Correct Option is B

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Top Questions on communication systems

The percentage of the total power carried by the sidebands of the AM wave for tone modulation when the modulation index is 0.3 is:
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Match List-I with List-II:

List-I (Modulation Schemes)	List-II (Wave Expressions)
(A) Amplitude Modulation	(I) \( x(t) = A\cos(\omega_c t + k m(t)) \)
(B) Phase Modulation	(II) \( x(t) = A\cos(\omega_c t + k \int m(t)dt) \)
(C) Frequency Modulation	(III) \( x(t) = A + m(t)\cos(\omega_c t) \)
(D) DSB-SC Modulation	(IV) \( x(t) = m(t)\cos(\omega_c t) \)

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