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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 25 July 2021, Shift 2, Physics Q1

Question 1 of 90 in this shift, Physics question 1 of 30, Section A.

The force is given in terms of time tt and displacement xx by the equation F=A cos⁡Bx+C sin⁡DtF = A\ \cos Bx + C\ \sin Dt The dimensional formula of ADB\frac{AD}{B} is :
  1. (1)[M1 L1 T−2][\mathrm{M^1\ L^1\ T^{-2}}]
  2. (2)[M2 L2 T−3][\mathrm{M^2\ L^2\ T^{-3}}]
  3. (3)[M0 L T−1][\mathrm{M^0\ L\ T^{-1}}]
  4. (4)[M L2 T−3][\mathrm{M\ L^2\ T^{-3}}]Official answer

Official answer

Option 4

NTA final key.

Chapter
Units and Measurements
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.