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Friday, 9 October

JEE Main 2017 · PhysicsMultiple choiceSingle correctEasyConceptual

JEE Main 2 April 2017 (offline), Physics Q28

Question 28 of 90 in this shift, Physics question 28 of 30.

In amplitude modulation, sinusoidal carrier frequency used is denoted by ωc\omega_c and the signal frequency is denoted by ωm\omega_m. The bandwidth (Δωm\Delta\omega_m) of the signal is such that Δωm≪ωc\Delta\omega_m \ll \omega_c. Which of the following frequencies is **not** contained in the modulated wave ?
  1. (1)ωm\omega_mOfficial answer
  2. (2)ωc\omega_c
  3. (3)ωm+ωc\omega_m+\omega_c
  4. (4)ωc−ωm\omega_c-\omega_m

Official answer

Option 1

CBSE answer key (25/04/2017, used for result).

Chapter
Communication Systems
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA (CBSE ran the 2017 exam); answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.