The heat generated in 1 minute between points A and B in the given circuit, when a battery of 9 V with internal resistance of 1 Ω is connected across these points is ______ J. Numerical answer type. Work it out, then open the answer.

Answer: 1080. 1/2 = 2/4, so the bridge is balanced and the middle 1 Ω carries no current. RAB = (1 + 2) ∥ (2 + 4) = 3 ∥ 6 = 2 Ω. I = (9)/(2 + 1) = 3 A. H = I² RAB t = 9 × 2 × 60 = 1080 J.

The heat generated in 1 minute between points A and B in the given… | JEE Main 2026 (21 Jan, Shift 1)

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Electrical Power & Heating Effect

The heat generated in 1 minute between points $A$ and $B$ in the given circuit, when a battery of 9 V with internal resistance of $1\ \Omega$ is connected across these points is ______ J.

Numerical answer type. Work it out, then open the answer.

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Answer: 1080

$\dfrac{1}{2} = \dfrac{2}{4}$ , so the bridge is balanced and the middle $1\ \Omega$ carries no current.
$R_{AB} = (1 + 2) \parallel (2 + 4) = 3 \parallel 6 = 2\ \Omega$ .
$I = \dfrac{9}{2 + 1} = 3\text{ A}$ .
$H = I^2 R_{AB} t = 9 \times 2 \times 60 = 1080\text{ J}$ .

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