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Saturday, 31 October

JEE Main 2022 · PhysicsNumerical answerNumerical valueMediumCalculation

JEE Main 26 July 2022, Shift 1, Physics Q55

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

A composite parallel plate capacitor is made up of two different dielectric materials with different thickness (t1t_1 and t2t_2) as shown in figure. The two different dielectric materials are separated by a conducting foil F. The voltage of the conducting foil is __________ V.

The figure, in words

A rectangular loop containing a 100 V battery on the right side and, on the left side, a parallel plate capacitor drawn as stacked horizontal plates. Labels beside the plates read: epsilon_r1 = 3 ; t1 = 0.5 mm, and epsilon_r2 = 4 ; t2 = 1 mm.

Official answer

60

NTA final key.

Chapter
Electrostatic Potential and Capacitance
Topic
Parallel Plate Capacitors
Idea tested
Multiple Dielectric Configurations

Same topic in other shifts

All Parallel Plate Capacitors questions
  1. 4 Apr 2026, Shift 1 · Q40A parallel plate air capacitor is connected to a battery. The plates are pulled apart at uniform speed vv. If xx is the separation…MediumSingle correct
  2. 4 Apr 2026, Shift 2 · Q37From the circuit given below, the capacitance between terminals AA and BB shown in the circuit is ________ μ\muF. (take…MediumDiagram basedHas a figure
  3. 5 Apr 2026, Shift 1 · Q37A displacement current of 4.0 A can be set up in the space between two parallel plates of 6 μ6\ \muF capacitor. The rate of change of…EasySingle correct
  4. 3 Apr 2025, Shift 2 · Q38Using a battery, a 100 pF capacitor is charged to 60 V and then the battery is removed. After that, a second uncharged capacitor is…EasySingle correct
  5. 7 Apr 2025, Shift 1 · Q26If ϵ0\epsilon_0 denotes the permittivity of free space and ΦE\Phi_E is the flux of the electric field through the area bounded by the…MediumSingle correct
  6. 5 Apr 2024, Shift 1 · Q45An alternating voltage of amplitude 40 V and frequency 4 kHz is applied directly across the capacitor of 12 μF12\ \mu\mathrm{F}. The maximum…EasySingle correct

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 108 of the 174 JEE Main shifts held from 2017 to 2026.