JEE Main 2021PhysicsElectrostaticsHardMCQ

JEE Main 2021Electrostatics Question with Solution

JEE Main 2021 (27 Aug Shift 1)

Question

A uniformly charged disc of radius R having surface charge density σ is placed in the xy plane with its center at the origin. Find the electric field intensity along the z-axis at a distance Z from origin:

Choose an option

Show full solutionCorrect option: C
Correct answer
CE=σ2ε01-ZZ2+R21/2

Step-by-step explanation

E=0R14πε0×σ×2πxdx×xx2+Z232=σ2ε01-ZZ2+R21/2

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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.