JEE MAIN - Physics (2025 - 28th January Evening Shift - No. 24)
The value of current I in the electrical circuit as given below, when potential at A is equal to the potential at B, will be _______ A.
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Answer
2
Explanation
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$$\begin{aligned} & \mathrm{V}_{\mathrm{A}}=\mathrm{V}_{\mathrm{B}} \Rightarrow \text { the bridge is balanced } \\ & \Rightarrow \frac{10}{\mathrm{R}}=\frac{20}{40} \\ & \mathrm{R}=20 \Omega \\ & \mathrm{I}=\frac{40}{20}=2 \mathrm{~A} \end{aligned}$$
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