Learn

Friday, 9 October

JEE Main 2026 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 6 April 2026, Shift 2, Physics Q40

Question 40 of 75 in this shift, Physics question 15 of 25, Section A.

A sphere of capacitance 100 pF is charged to a potential of 100 V. Another identical uncharged metal sphere is brought in contact with the charged sphere, then the change in the total energy stored on these spheres, when they touch is α×10−7\alpha\times10^{-7} J. The value of α\alpha is __________. (combined capacitance of spheres is 200 pF)
  1. (1)5
  2. (2)52\frac{5}{2}Official answer
  3. (3)72\frac{7}{2}
  4. (4)92\frac{9}{2}

Official answer

Option 2

NTA final key.

Chapter
Electrostatic Potential and Capacitance
Topic
Electric Potential
Idea tested
Heat Loss During Charge Sharing

Same topic in other shifts

All Electric Potential questions
  1. 2 Apr 2025, Shift 2 · Q42Two large plane parallel conducting plates are kept 10 cm apart as shown in figure. The potential difference between them is V. The…MediumDiagram basedHas a figure
  2. 3 Apr 2025, Shift 1 · Q39The electrostatic potential on the surface of uniformly charged spherical shell of radius R = 10 cm is 120 V. The potential at the centre…EasySingle correct
  3. 7 Apr 2025, Shift 1 · Q38Two charges q1q_1 and q2q_2 are separated by a distance of 30 cm. A third charge q3q_3 initially at 'C' as shown in the figure, is moved…MediumDiagram basedHas a figure
  4. 8 Apr 2025, Shift 2 · Q35Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : Work done in moving a…EasyAssertion–reason
  5. 9 Apr 2024, Shift 1 · Q55At the centre of a half ring of radius R=10R=10 cm and linear charge density 4 nC m−14\ \mathrm{nC\,m^{-1}}, the potential is xπx\pi V. The value…EasyNumerical value
  6. 31 Jan 2024, Shift 2 · Q55The distance between charges +q+q and −q-q is 2l2l and between +2q+2q and −2q-2q is 4l4l. The electrostatic potential at point PP at a…MediumNumerical valueHas a figure

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