JEE Main 2020PhysicsElectrostaticsMediumMCQ

JEE Main 2020Electrostatics Question with Solution

JEE Main 2020 (05 Sep Shift 2)

Question

Ten charges are placed on the circumference of a circle of radius R with constant angular separation between successive charges. Alternate charges1,3,5,7,9 have charge (+q) each, while 2,4,6,8,10 have charge (q) each. The potential V and the electric field E at the centre of the circle are respectively : (TakeV=0 at infinity)

Choose an option

Show full solutionCorrect option: C
Correct answer
C V=0; E=0

Step-by-step explanation

vnet=5kqR+5k(-q)R
vnet=0, Qnet=0
Enet=0, by symmetry

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About this question

This is a previous-year question from JEE Main 2020, 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.