Q. The modulation index of a FM signal is 0.25. If modulating frequency is 2kHz, the maximum derivative in frequency would be
A) 500 Hz
B) 1000 Hz
C) 1500 Hz
D) 500 kHz
Explanation
(a) As, $m_{f} = \frac{\delta_{\max}}{f_{m}}$
$\therefore\ \ \delta_{\max} = m_{f} \times f_{m} = 0.25 \times 2000\ Hz$
=500 Hz
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.