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Saturday, 31 October

JEE Main 2022 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 24 June 2022, Shift 2, Physics Q45

Question 45 of 90 in this shift, Physics question 15 of 30, Section A.

If the charge on a capacitor is increased by 2 C, the energy stored in it increases by 44%. The original charge on the capacitor is (in C)
  1. (1)10Official answer
  2. (2)20
  3. (3)30
  4. (4)40

Official answer

Option 1

NTA final key.

Chapter
Electrostatic Potential and Capacitance
Topic
Parallel Plate Capacitors
Idea tested
Energy Stored in Capacitor

Same idea in other shifts

Asked 2× in all
  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

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.