COMEDK · Physics · 31. Communication System
Maximum amplitude of message signal in amplitude modulation is \(20 \mathrm{~cm}\). If the amplitude of carrier wave is \(40 \mathrm{~cm}\), then modulation index of modulated wave is
- A 1
- B 0.5
- C 0.25
- D 2
Answer & Solution
Correct Answer
(B) 0.5
Step-by-step Solution
Detailed explanation
The modulation index \(\mu\) for an amplitude modulated wave is defined as the ratio of the amplitude of the message signal \(A_m\) to the amplitude of the carrier wave \(A_c\). Given values are \(A_m = 20 \text{ cm}\) and \(A_c = 40 \text{ cm}\). The formula for the modulation…
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