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Saturday, 10 October

JEE Main 2025 · PhysicsMultiple choiceDiagram basedMediumMulti-step

JEE Main 7 April 2025, Shift 1, Physics Q36

Question 36 of 75 in this shift, Physics question 11 of 25, Section A.

A wire of resistance R is bent into a triangular pyramid as shown in figure with each segment having same length. The resistance between points A and B is R/n. The value of n is :

The figure, in words

Triangular pyramid (tetrahedron) drawn in plane as a triangle with apex at top, base vertices A (bottom left) and B (bottom right), and a central vertex joined to all three corners; each of the six segments is a resistor of equal length. Points A and B are marked.
  1. (1)1010
  2. (2)1212Official answer
  3. (3)1414
  4. (4)1616

Official answer

Option 2

NTA final key.

Chapter
Current Electricity
Topic
Wheatstone Bridge
Idea tested
Hidden Wheatstone Bridges in Complex Networks

Same topic in other shifts

All Wheatstone Bridge questions
  1. 6 Apr 2026, Shift 2 · Q48A moving coil of galvanometer when shunted with 2 Ω\Omega resistance gives a full scale deflection for a current of 500 mA. When a…MediumNumerical value
  2. 9 Apr 2024, Shift 1 · Q50A galvanometer has a coil of resistance 200 Ω200\ \Omega with a full scale deflection at 20 μ20\ \muA. The value of resistance to be added to…EasySingle correct
  3. 29 Jan 2024, Shift 1 · Q42A galvanometer having coil resistance 10 Ω10\,\Omega shows a full scale deflection for a current of 3mA. For it to measure a current of 8A,…EasySingle correct
  4. 29 Jan 2024, Shift 1 · Q50The deflection in moving coil galvanometer falls from 25 divisions to 5 division when a shunt of 24 Ω24\,\Omega is applied. The resistance…MediumSingle correct
  5. 31 Jan 2024, Shift 2 · Q49The resistance per centimeter of a meter bridge wire is rr, with X ΩX\ \Omega resistance in left gap. Balancing length from left end is at…MediumSingle correct
  6. 13 Apr 2023, Shift 2 · Q56In the circuit shown, the energy stored in the capacitor is n μn\ \muJ. The value of n is ______.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. 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.