TS EAMCET · Physics · Communication System
A message signal is used to modulate a carrier frequency. If the peak voltages of message signal and carrier signals are increased by \(0.1 \%\) and \(0.3 \%\) respectively, then the percentage change in modulation index is
- A 0.4
- B 0
- C -0.4
- D -02
Answer & Solution
Correct Answer
(D) -02
Step-by-step Solution
Detailed explanation
(d) We know that, the modulation index is given by \(\mu=\frac{A_m}{A_c}\) where, \(A_m=\) maximum amplitude of message signal and \(A_c=\) maximum amplitude of carrier-signal. Given, \(A_m\) and \(A_c\) are increased by \(0.1 \%\) and \(0.3 \%\), then the modulation index…
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