Question

Which of the following statements is correct?

• A. Pulse position denotes the time of rise or fall of the pulse amplitude
• B. Modulation index μ is kept ≥ 1 to avoid distortion
• C. The audible range of frequencies is 20 Hz to 200 MHz
• D. In amplitude modulation, the bandwidth is thrice the modulating frequency

Answer 1

Answer: (A)

Modulation index $\mu \le 1$ to avoid distortion. The audible range of frequencies is 20 Hz to 20 kHz.
In amplitude modulation, the bandwidth is twice the modulating frequency.