JEE Main 2025 — Electromagnetic Waves Question with Solution
From: JEE Main 2025 (Online) 23rd January Evening Shift
Question
A time varying potential difference is applied between the plates of a parallel plate capacitor of capacitance . The dielectric constant of the medium between the capacitor plates is 1 . It produces an instantaneous displacement current of 0.25 mA in the intervening space between the capacitor plates, the magnitude of the rate of change of the potential difference will be _________ .
Enter your answer
Show full solutionCorrect answer: 100
Step-by-step explanation
Given that the displacement current is and the capacitance is the rate of change of the potential difference is calculated as follows:
Thus, the magnitude of the rate of change of the potential difference is .
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Electromagnetic Waves chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2025, covering the Electromagnetic Waves 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.