Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Principles of Communication/
Question 20237
JEE Physics · Medium

Principles of Communication: Frequency Modulation MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Frequency ModulationMediumQuestion 20237

Question

In FM, the frequency deviation Δf is proportional to:
  1. A
    Carrier frequency
  2. B
    Message frequency
  3. C
    Message amplitude
    Correct
  4. D
    Carrier amplitude

Correct answer

Message amplitude

Explanation

In FM, Δf = kf × Am. The rate of frequency variation follows the message frequency. So amplitude controls deviation and message frequency controls rate of change.

Review Principles of Communication notesStart timed chapter practice