JEE Main 2024PhysicsMathematics in PhysicsEasyMCQ

JEE Main 2024 — Mathematics in Physics Question with Solution

JEE Main 2024 (31 Jan Shift 2)

Question

If two vectors A→ and B→ having equal magnitude R are inclined at an angle θ, then

Choose an option

Show full solutionCorrect option: C
Correct answer
CA→+B→=2Rcosθ2

Step-by-step explanation

The magnitude of resultant vector A→+B→ is given by, 

R'=A2+B2+2ABcosθ

Here A=B=R

Then R'=R2+R2+2R2cosθ

=R21+cosθ

=2R2cos2θ2

=2Rcosθ2

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Mathematics in Physics chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2024, 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.