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Saturday, 31 October

JEE Main 2021 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 26 February 2021, Shift 2, Chemistry Q53

Question 53 of 90 in this shift, Chemistry question 23 of 30, Section B.

A ball weighing 10 g is moving with a velocity of 90 ms−1\mathrm{ms^{-1}}. If the uncertainty in its velocity is 5%, then the uncertainty in its position is __________ ×10−33\times 10^{-33} m. (Rounded off to the nearest integer) [Given : h =6.63×10−34= 6.63 \times 10^{-34} Js]

Official answer

1

NTA final key.

Chapter
Structure of Atom
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.