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Saturday, 31 October

JEE Main 2021 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 26 August 2021, Shift 1, Physics Q28

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

An amplitude modulated wave is represented by Cm(t)=10(1+0.2cos⁡12560t)sin⁡(111×104t)C_m(t)=10(1+0.2\cos 12560t)\sin(111\times10^{4}t) volts. The modulating frequency in kHz will be __________.

Official answer

2

NTA final key.

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; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.