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Saturday, 31 October

JEE Main 2023 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 6 April 2023, Shift 2, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

Figure shows a part of an electric circuit. The potentials at points aa, bb and cc are 30 V, 12 V and 2 V respectively. The current through the 20 Ω\Omega resistor will be,

The figure, in words

Point a connects through a 10 ohm resistor to a junction that splits into two branches: a 20 ohm resistor leading to point b, and a 30 ohm resistor leading to point c (arrows towards b and c).
  1. (1)0.2 A
  2. (2)0.6 A
  3. (3)0.4 AOfficial answer
  4. (4)1.0 A

Official answer

Option 3

NTA final key.

Chapter
Current Electricity
Topic
Kirchhoff's Laws
Idea tested
Nodal Analysis Technique

Same idea in other shifts

Asked 2× in all
  1. 3 Aug 2021, Shift 2 · Q28As the switch S is closed in the circuit shown in figure, current passed through it is ‾\underline{\hspace{2em}} A.EasyNumerical 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 108 of the 174 JEE Main shifts held from 2017 to 2026.