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JEE Main 2021 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 22 July 2021, Shift 2, Physics Q11

Question 11 of 90 in this shift, Physics question 11 of 30, Section A.

What will be the projection of vector

\vec{A} = \hat{i}+\hat{j}+\hat{k}

on vector

\vec{B} = \hat{i}+\hat{j}

?

(1) $\sqrt{2}(\hat{i}+\hat{j}+\hat{k})$
(2) $(\hat{i}+\hat{j})$ Official answer
(3) $\sqrt{2}(\hat{i}+\hat{j})$
(4) $2(\hat{i}+\hat{j}+\hat{k})$

Official answer

Option 2

NTA final key.

Chapter: Motion in a Plane
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.