JEE Main 2021PhysicsElectrostaticsHardMCQ

JEE Main 2021Electrostatics Question with Solution

JEE Main 2021 (27 Aug Shift 2)

Question

Figure shows a rod AB, which is bent in a 120° circular arc of radius R. A charge (-Q) is uniformly distributed over rod AB. What is the electric filed E at the centre of curvature O ?

Choose an option

Show full solutionCorrect option: A
Correct answer
A33Q8π2ε0R2 i^

Step-by-step explanation

δ=2kλRsinθ2i^

=2kRQ2Rπ3sin60°i^

=3kQπR232i^

=332πkQR2i^

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About this question

This is a previous-year question from JEE Main 2021, covering the Electrostatics 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.