JEE Main 2025 — Electrostatics Question with Solution
From: JEE Main 2025 (Online) 28th January Morning Shift
Question
A particle of mass ' ' and charge ' ' is fastened to one end ' ' of a massless string having equilibrium length , whose other end is fixed at point ' '. The whole system is placed on a frictionless horizontal plane and is initially at rest. If uniform electric field is switched on along the direction as shown in figure, then the speed of the particle when it crosses the -axis is
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: C
Step-by-step explanation
In
(as )
Using work energy theorem,
(As and )
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This is a previous-year question from JEE Main 2025, 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.