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Friday, 9 October

JEE Main 2024 · PhysicsMultiple choiceSingle correctMediumMulti-step

JEE Main 9 April 2024, Shift 2, Physics Q43

Question 43 of 90 in this shift, Physics question 13 of 30, Section A.

The effective resistance between AA and BB, if resistance of each resistor is RR, will be :

The figure, in words

Resistor network between terminals A (left) and B (right), every resistor R ohm. A connects through a series resistor R to a left node; B connects through a series resistor R to a right node. Between the left and right nodes: a middle horizontal branch of two resistors R in series, an upper path (left node to top node via R, top node to right node via R) and a lower path (left node to bottom node via R, bottom node to right node via R). A vertical resistor R joins the top node to the midpoint of the middle horizontal branch, and another vertical resistor R joins that midpoint to the bottom node.
  1. (1)23R\frac{2}{3}R
  2. (2)4R3\frac{4R}{3}
  3. (3)5R3\frac{5R}{3}
  4. (4)8R3\frac{8R}{3}Official answer

Official answer

Option 4

NTA final key.

Chapter
Current Electricity
Topic
Kirchhoff's Laws
Idea tested
Circuit Symmetry Analysis

Same topic in other shifts

All Kirchhoff's Laws questions
  1. 2 Apr 2026, Shift 2 · Q38Two resistors of 200 Ω\Omega and 400 Ω\Omega are connected in series with a battery of 100 V. A bulb rated at 200 V, 100 W is connected…MediumSingle correct
  2. 4 Apr 2026, Shift 1 · Q43The voltage and the current between AA and BB points shown in the circuit are ______.MediumDiagram basedHas a figure
  3. 5 Apr 2026, Shift 1 · Q34Refer to the figure given below. The values of I1I_1, I2I_2 and I3I_3 are ________.MediumDiagram basedHas a figure
  4. 5 Apr 2026, Shift 1 · Q38Refer to the figure given below, current between terminals AA and BB is ________ A.MediumDiagram basedHas a figure
  5. 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
  6. 6 Apr 2026, Shift 1 · Q46Refer to the circuit diagram given below. The heat generated across the 6 Ω6\ \Omega resistance in 100 second is α100\frac{\alpha}{100} J.…HardNumerical 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.