Question:medium

A cell of emf \(E\) is connected across a resistance \(R\). The potential difference between the terminals of the cell is found to be \(V\). The internal resistance of the cell must be

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Terminal voltage \(V = E - Ir\). Current \(I = V/R\). Substitute and solve for \(r\).
Updated On: Apr 8, 2026
  • \(R\left[\dfrac{E}{V} - 1\right]\)
  • \(R\left[\dfrac{E}{V} + 1\right]\)
  • \(ER\)
  • \((E-V)R\)
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The Correct Option is A

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