Learn

Friday, 9 October

JEE Main 2026 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 2 April 2026, Shift 1, Physics Q32

Question 32 of 75 in this shift, Physics question 7 of 25, Section A.

A parallel plate air capacitor has a capacitance C. When it is half filled as show in figure with a dielectric constant K=5K=5, the percentage increase in the capacitance is __________.

The figure, in words

Parallel plate capacitor, upper plate +, lower plate -, separation d; the upper half (thickness d/2) is filled with dielectric K=5, lower half is air.
  1. (1)33.3433.34
  2. (2)66.6766.67Official answer
  3. (3)200200
  4. (4)400400

Official answer

Option 2

NTA final key.

Chapter
Electrostatic Potential and Capacitance
Topic
Dielectrics
Idea tested
Partial and Multiple Slabs

Same idea in other shifts

Asked 5× in all
  1. 8 Apr 2025, Shift 2 · Q49Space between the plates of a parallel plate capacitor of plate area 4 cm2^2 and separation of (d) 1.77 mm, is filled with uniform…MediumNumerical valueHas a figure
  2. 6 Apr 2024, Shift 2 · Q52A capacitor of 10 μF10\ \mu\mathrm{F} capacitance whose plates are separated by 10 mm through air and each plate has area 4 cm24\ \mathrm{cm}^2…HardNumerical valueHas a figure
  3. 6 Apr 2023, Shift 1 · Q56A parallel plate capacitor with plate area A and plate separation d is filled with a dielectric material of dielectric constant K=4K=4. The…MediumNumerical valueHas a figure
  4. 18 Mar 2021, Shift 1 · Q29A parallel plate capacitor has plate area 100 m2^2 and plate separation of 10 m. The space between the plates is filled up to a thickness…MediumNumerical 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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.