AP EAMCET · PHYSICS · Communication System
A carrier wave of peak voltage \(15 \mathrm{~V}\) is used to transmit a message signal. If the modulation index is \(60 \%\), then the peak voltage of the modulating signal is
- A \(3 \mathrm{~V}\)
- B \(6 \mathrm{~V}\)
- C \(9 \mathrm{~V}\)
- D \(12 \mathrm{~V}\)
Answer & Solution
Correct Answer
(C) \(9 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
The peak voltage for the modulating signal is \(\mathrm{m}=\frac{\mathrm{A}_{\mathrm{m}}}{\mathrm{A}_{\mathrm{C}}} ; \mathrm{A}_{\mathrm{m}}=\mathrm{mA}_{\mathrm{C}}=0.60 \times 15=9 \mathrm{~V}\)
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