Question:
The maximum and minimum voltage of an amplitude modulated signal are 60 V and 20 V, respectively. The percentage modulation index will be:
The maximum and minimum voltage of an amplitude modulated signal are 60 V and 20 V, respectively. The percentage modulation index will be:
Updated On: Mar 19, 2025
- 0.5%
- 50%
- 2%
- 30%
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The Correct Option is B
Solution and Explanation
The percentage modulation index is:
\(μ = \frac{V_{max}-V_{min}}{V_{max}+V_{min}} \times 100\)
= \(\frac{60-20}{60+20} \times 100\)
= \(50 \%\)
Hence, the correct option is (B): \(50\%\)
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Concepts Used:
AC Voltage
When voltage changes its direction after every half cycle is known as alternating voltage. The current flows in the circuit at that time are known as alternating current. The alternating current(AC) follows the sine function which changes its polarity concerning time. Most of the electrical devices are operating on the ac voltage.
