JEE Main 2021PhysicsMathematics in PhysicsEasyMCQ

JEE Main 2021 — Mathematics in Physics Question with Solution

JEE Main 2021 (22 Jul Shift 1)

Question

What will be the projection of vector A→=i^+j^+k^ on vector B→=i^+j^ ?

Choose an option

Show full solutionCorrect option: D
Correct answer
D(i^+j^)

Step-by-step explanation

AcosθB^=AA→·B→ABB^=A→·B→BB^
=22i^+j^2=i^+j^

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About this question

This is a previous-year question from JEE Main 2021, covering the Mathematics in Physics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.