AP EAMCET · PHYSICS · Communication System
In amplitude modulation of waves, the maximum amplitude is 30 mV and minimum amplitude is 5 mV, then the modulation index is
- A \(\frac{4}{7}\)
- B \(\frac{3}{7}\)
- C \(\frac{5}{7}\)
- D \(\frac{2}{7}\)
Answer & Solution
Correct Answer
(C) \(\frac{5}{7}\)
Step-by-step Solution
Detailed explanation
\( \mu = \frac{A_{max} - A_{min}}{A_{max} + A_{min}} \) \( \mu = \frac{30 \text{ mV} - 5 \text{ mV}}{30 \text{ mV} + 5 \text{ mV}} \) \( \mu = \frac{25}{35} = \frac{5}{7} \)
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