JEE Main 2025 Jan 28 Shift 1, Physics Q14: Introduction And Ohm’s Law

JEE Main2025Jan 28, Shift 1Physics

Find the equivalent resistance between two ends of the following circuit.

Solution

The connecting wires collapse the network so that all three $r /3$ resistors share the same pair of nodes — they are all in parallel between A and B.

Three equal resistors of $r /3$ in parallel give an equivalent resistance:

$R_{eq} = \frac{r /3}{3} = \frac{r}{9}$ .

Concept behind this question

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