JEE Main 2019 — Electrostatics Question with Solution
JEE Main 2019 (10 Apr Shift 2)
Question
A simple pendulum of length is placed between the plates of a parallel plate capacitor having electric field , as shown in figure. Its bob has mass and charge . The time period of the pendulum is given by:
Choose an option
Show full solutionCorrect option: A
Correct answer
A
Step-by-step explanation
Two forces will be acting on the mass , gravity force and force by the electric field.
Thus, the effective force
From force equation,
Time period of the pendulum is
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This is a previous-year question from JEE Main 2019, 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.