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Saturday, 31 October

JEE Main 2023 · PhysicsMultiple choiceSingle correctEasyApplication

JEE Main 13 April 2023, Shift 2, Physics Q41

Question 41 of 90 in this shift, Physics question 11 of 30, Section A.

A 10 μ10\ \muC charge is divided into two parts and placed at 11 cm distance so that the repulsive force between them is maximum. The charges of the two parts are:
  1. (1)8 μC,2 μC8\ \mu\mathrm{C}, 2\ \mu\mathrm{C}
  2. (2)7 μC,3 μC7\ \mu\mathrm{C}, 3\ \mu\mathrm{C}
  3. (3)5 μC,5 μC5\ \mu\mathrm{C}, 5\ \mu\mathrm{C}Official answer
  4. (4)9 μC,1 μC9\ \mu\mathrm{C}, 1\ \mu\mathrm{C}

Official answer

Option 3

NTA final key.

Chapter
Electric Charges and Fields
Topic
Coulomb's Law
Idea tested
Maximizing Force via Charge Division

Same idea in other shifts

Asked 2× in all
  1. 27 Jul 2022, Shift 2 · Q40A charge of 4 μ\muC is to be divided into two. The distance between the two divided charges is constant. The magnitude of the divided…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. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.