AP EAMCET · PHYSICS · Communication System
The amplitude of the side bands of the modulated signal if the carrier signal and message signal amplitudes are \(25 \mathrm{~V}\) and \(5 \mathrm{~V}\) respectively is
- A \(0.5 \mathrm{~V}\)
- B \(2.5 \mathrm{~V}\)
- C \(0.2 \mathrm{~V}\)
- D \(5 \mathrm{~V}\)
Answer & Solution
Correct Answer
(B) \(2.5 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
We have \(\mathrm{m}=\frac{\mathrm{A}_{\mathrm{m}}}{\mathrm{A}_{\mathrm{c}}}=\frac{5}{25}=\frac{1}{5}\) So, amplitude of side band \(=\frac{\mathrm{mA}_{\mathrm{C}}}{2}=\frac{1}{5} \times \frac{1}{2} \times 25=2.5 \mathrm{~V}\)
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