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Saturday, 31 October

JEE Main 2023 · PhysicsMultiple choiceDiagram basedMediumConceptual

JEE Main 6 April 2023, Shift 2, Physics Q48

Question 48 of 90 in this shift, Physics question 18 of 30, Section A.

A student is provided with a variable voltage source V, a test resistor RT=10ΩR_T=10\Omega, two identical galvanometers G1G_1 and G2G_2 and two additional resistors, R1=10MΩR_1=10M\Omega and R2=0.001ΩR_2=0.001\Omega. For conducting an experiment to verify ohm's law, the most suitable circuit is:

The figure, in words

Four circuit diagrams, each with variable voltage source V, test resistor R_T, galvanometers G1, G2 and resistors R1, R2 connected differently (see options).
  1. (1)[figure: circuit with variable source V; G1 in parallel with R2, that pair in parallel with R_T; then G2 and R1 in series in the main loop]
  2. (2)[figure: circuit with variable source V; G1 in parallel with R1, that pair in parallel with R_T; then G2 and R2 in series in the main loop]
  3. (3)[figure: circuit with variable source V; G1 in parallel with R2, that pair in parallel with R_T; then G2 in parallel with R1 in series in the main loop]
  4. (4)[figure: circuit with variable source V; G1 in series with R1, that branch in parallel with R_T; then G2 in parallel with R2 in series in the main loop]Official answer

Official answer

Option 4

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