Published by:
CGP EDU Academic Team
Published on: September 11, 2026
An audio signal 
amplitude modulates a carrier 
. The value of percentmodulation is
Text Solution
Verified by ExpertsThe correct answer is:
A
To find the percent modulation, we need to use the following formula:
Percent Modulation (PM) = \frac{V_m}{V_c} \times 100
where:
- \(V_m\) is the peak amplitude of the modulating signal
- \(V_c\) is the peak amplitude of the carrier signal
From the equations given:
1. Modulating signal: \(V_m = 20\) (peak amplitude)
2. Carrier signal: \(V_c = 80\) (peak amplitude)
Plugging in the values:
PM = \frac{20}{80} \times 100 = 25%
Therefore, the percent modulation is 25%.
Percent Modulation (PM) = \frac{V_m}{V_c} \times 100
where:
- \(V_m\) is the peak amplitude of the modulating signal
- \(V_c\) is the peak amplitude of the carrier signal
From the equations given:
1. Modulating signal: \(V_m = 20\) (peak amplitude)
2. Carrier signal: \(V_c = 80\) (peak amplitude)
Plugging in the values:
PM = \frac{20}{80} \times 100 = 25%
Therefore, the percent modulation is 25%.
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