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JEE Main 31 January 2024, Shift 1, Physics Q55

Question 55 of 90 in this shift, Physics question 25 of 30, Section B.

A parallel plate capacitor with plate separation 5 mm is charged up by a battery. It is found that on introducing a dielectric sheet of thickness 2 mm , while keeping the battery connections intact, the capacitor draws 25% more charge from the battery than before. The dielectric constant of the sheet is ________.

Official answer

NTA final key.

Chapter: Electrostatic Potential and Capacitance
Topic: Dielectrics
Idea tested: Dielectric with Battery Connected

Same idea in other shifts

Asked 3× in all

29 Jun 2022, Shift 1 · Q47A parallel plate capacitor filled with a medium of dielectric constant 10, is connected across a battery and is charged. The dielectric…EasySingle correct
31 Aug 2021, Shift 2 · Q23A parallel plate capacitor of capacitance 200 $\mu$ F is connected to a battery of 200 V. A dielectric slab of dielectric constant 2 is now…EasyNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.