Question:medium

Which modulation technique is more immune to noise: AM or FM?

Show Hint

FM → More noise resistant (amplitude unaffected); AM → Noise sensitive.
Updated On: Mar 18, 2026
  • AM
  • FM
  • Both equally
  • None
Show Solution

The Correct Option is B

Solution and Explanation

Step 1: Understanding the Concept:
Noise in the transmission channel typically affects the amplitude of the signal.
Step 2: Detailed Explanation:
- In Amplitude Modulation (AM), information is stored in the amplitude. Since noise changes the amplitude, it directly distorts the information.
- In Frequency Modulation (FM), information is stored in the frequency variations, while the amplitude is kept constant.
FM receivers use limiters to clip noise-induced amplitude variations without losing information, making FM much more noise-resistant.
Step 3: Final Answer:
FM is more immune to noise than AM.
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