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Friday, 9 October

JEE Main 2025 · PhysicsMultiple choiceDiagram basedEasyApplication

JEE Main 4 April 2025, Shift 2, Physics Q37

Question 37 of 75 in this shift, Physics question 12 of 25, Section A.

From the combination of resistors with resistances values R1=R2=R3=5 ΩR_1=R_2=R_3=5\ \Omega and R4=10 ΩR_4=10\ \Omega, which of the following combination is the best circuit to get an equivalent resistance of 6Ω6\Omega ?

The figure, in words

Four candidate resistor networks between two terminals, given as the options.
  1. (1)[figure: R1 in the top branch, R2 and R3 in series in the middle branch, R4 in the bottom branch; all three branches in parallel]
  2. (2)[figure: R1, R2 and R4 in series in the top branch, in parallel with R3 in the bottom branch]
  3. (3)[figure: R1 and R2 in series in the top branch, in parallel with R3 and R4 in series in the bottom branch]Official answer
  4. (4)[figure: R1, R2, R3 and R4 all connected in parallel]

Official answer

Option 3

NTA final key.

Chapter
Current Electricity
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.