Question
Download Solution PDFWhich of the following statements is/are correct regarding Frequency Modulation (FM) and Amplitude Modulation (AM)?
a) FM provides better noise immunity.
b) AM requires lower bandwidth than FM.
c) FM utilises transmitted power more efficiently.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct statements regarding Frequency Modulation (FM) and Amplitude Modulation (AM) are a, b, and c.
Explanation:
a) FM provides better noise immunity.
-
True. FM encodes information in frequency variations, making it less susceptible to amplitude noise (e.g., interference, static). AM, which relies on amplitude changes, is highly vulnerable to noise.
b) AM requires lower bandwidth than FM.
-
True. AM bandwidth is twice the maximum modulating frequency (e.g., 10 kHz for a 5 kHz signal).
c) FM utilizes transmitted power more efficiently.
-
True. FM maintains a constant envelope (amplitude), allowing all transmitted power to carry information. In AM, up to ⅔ of power is wasted in the carrier (non-information-bearing), reducing efficiency.
Additional Information
| Property | AM | FM |
|---|---|---|
| Noise Immunity | Low (noise directly affects amplitude) | High (immune to amplitude noise) |
| Bandwidth | Narrow (e.g., 10 kHz for audio) | Wide (e.g., 200 kHz for audio) |
| Power Efficiency | Low (carrier dominates power) | High (all power carries information) |
Last updated on Jul 2, 2025
-> The RRB JE CBT 2 Result 2025 has been released for 9 RRBs Zones (Ahmedabad, Bengaluru, Jammu-Srinagar, Kolkata, Malda, Mumbai, Ranchi, Secunderabad, and Thiruvananthapuram).
-> RRB JE CBT 2 Scorecard 2025 has been released along with cut off Marks.
-> RRB JE CBT 2 answer key 2025 for June 4 exam has been released at the official website.
-> Check Your Marks via RRB JE CBT 2 Rank Calculator 2025
-> RRB JE CBT 2 admit card 2025 has been released.
-> RRB JE CBT 2 city intimation slip 2025 for June 4 exam has been released at the official website.
-> RRB JE CBT 2 Cancelled Shift Exam 2025 will be conducted on June 4, 2025 in offline mode.
-> RRB JE CBT 2 Exam Analysis 2025 is Out, Candidates analysis their exam according to Shift 1 and 2 Questions and Answers.
-> The RRB JE Notification 2024 was released for 7951 vacancies for various posts of Junior Engineer, Depot Material Superintendent, Chemical & Metallurgical Assistant, Chemical Supervisor (Research) and Metallurgical Supervisor (Research).
-> The selection process includes CBT 1, CBT 2, and Document Verification & Medical Test.
-> The candidates who will be selected will get an approximate salary range between Rs. 13,500 to Rs. 38,425.
-> Attempt RRB JE Free Current Affairs Mock Test here
-> Enhance your preparation with the RRB JE Previous Year Papers.