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Saturday, 31 October

JEE Main 2024 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 31 January 2024, Shift 2, Physics Q56

Question 56 of 90 in this shift, Physics question 26 of 30, Section B.

In the following circuit, the battery has an emf of 2V and an internal resistance of 23Ω\frac{2}{3}\Omega. The power consumption in the entire circuit is __________ W.

The figure, in words

Square network: 2 ohm resistors on the top and bottom sides, left and right sides plain wires; two diagonals, each made of two 2 ohm resistors, crossing at the centre. A 2 V battery in series with its internal resistance 2/3 ohm is connected between the left and right sides of the square.

Official answer

3

NTA final key.

Chapter
Current Electricity
Topic
Kirchhoff's Laws
Idea tested
Cell EMF and Internal Resistance

Same idea in other shifts

Asked 10× in all
  1. 5 Apr 2026, Shift 2 · Q49When an external resistance of 5 Ω\Omega is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5…EasyNumerical value
  2. 8 Apr 2024, Shift 1 · Q40In the given circuit, the terminal potential difference of the cell is :EasySingle correctHas a figure
  3. 11 Apr 2023, Shift 2 · Q59Two identical cells each of emf 1.5 V1.5\ \mathrm{V} are connected in series across a 10 Ω10\ \Omega resistance. An ideal voltmeter connected…MediumNumerical value
  4. 27 Jul 2022, Shift 1 · Q41Two sources of equal emfs are connected in series. This combination is connected to an external resistance R. The internal resistances of…MediumSingle correct
  5. 30 Jul 2022, Shift 2 · Q24A cell sends a current through a resistance 4 Ω for time t and sends current through another resistance 16 Ω for the same time t.If the…MediumNumerical value
  6. 27 Aug 2021, Shift 1 · Q26First, a set of n equal resistors of 10 Ω\Omega each are connected in series to a battery of emf 20 V and internal resistance 10…MediumNumerical value
  7. 22 Jul 2021, Shift 2 · Q27In an electric circuit, a cell of certain emf provides a potential difference of 1.25 V across a load resistance of 5 Ω\Omega. However,…EasyNumerical value
  8. 17 Mar 2021, Shift 2 · Q2Two cells of emf 2E and E with internal resistance r1\mathrm{r_1} and r2\mathrm{r_2} respectively are connected in series to an external…MediumDiagram basedHas 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.