Question

If ' $\mathrm{fm}^{\prime}$ is the modulation frequency in FM the modulation index is proportional to (A) $\mathrm{fm}$ (B) $\mathrm{f}_{\mathrm{m}}^{2}$ (C) $\left(1 / \mathrm{f}_{\mathrm{m}}\right)$ (D) $\left(1 / \mathrm{f}_{\mathrm{m}}^{2}\right)$

Name: Problem 2751, Chapter 20: JEE Physics
Uploaded: 2021-12-07T18:05:32-08:00
Duration: 1 min 24 s
Channel: Mirza Aslam Beig
Description: If ' fm^' is the modulation frequency in FM the modulation index is proportional to (A) fm (B) fm^2 (C) (1 / fm) (D) (1 / fm^2)

   If ' $\mathrm{fm}^{\prime}$ is the modulation frequency in FM the modulation index is proportional to
(A) $\mathrm{fm}$
(B) $\mathrm{f}_{\mathrm{m}}^{2}$
(C) $\left(1 / \mathrm{f}_{\mathrm{m}}\right)$
(D) $\left(1 / \mathrm{f}_{\mathrm{m}}^{2}\right)$

JEE Physics

StemEZ 1st Edition

Chapter 20, Problem 2751

Instant Answer

Solved by Expert Mirza Aslam Beig

12/07/2021

Step 1

The modulation index is defined as the ratio of the frequency deviation to the modulated frequency. Mathematically, it can be represented as: \[ M = \frac{\Delta f}{f_m} \] where $ M $ is the modulation index, $ \Delta f $ is the frequency deviation, and \( Show more…

Show all steps

Thanks for your feedback!

If ' $\mathrm{fm}^{\prime}$ is the modulation frequency in FM the modulation index is proportional to (A) $\mathrm{fm}$ (B) $\mathrm{f}_{\mathrm{m}}^{2}$ (C) $\left(1 / \mathrm{f}_{\mathrm{m}}\right)$ (D) $\left(1 / \mathrm{f}_{\mathrm{m}}^{2}\right)$

Play audio

Feedback

Mirza Aslam Beig and 55 other educators are ready to help you.

Ask a new question

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Frequency Modulation (FM)

FM is a modulation technique where the frequency of a carrier signal is varied in accordance with the amplitude of the input (modulating) signal. This method is widely used in communication systems because it offers improved noise resilience and signal quality.

Modulation Index

The modulation index in FM quantifies the intensity of modulation and is defined as the ratio of the frequency deviation to the modulating frequency. It determines the spectral characteristics of the modulated signal, including its bandwidth.

Frequency Deviation

Frequency deviation is the maximum variation of the instantaneous frequency from the unmodulated carrier frequency. It is a critical parameter in FM, as it, together with the modulating frequency, defines the modulation index and affects the overall transmission characteristics.

Please give Ace some feedback