Class/Course - Class XII

Subject - Physics

Chapter - Current Electricity


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Q.1 n identical cells are joined in series with its two cells A and B in the loop with reversed polarities. Emf of each shells is ε and internal resistance r. Potential difference across cell A or B is (here n > 4)
  $\frac{2\varepsilon \left (n - 2 \right )}{n}$
  $\frac{2\varepsilon \left (n + 2 \right )}{n}$
  $\frac{4\varepsilon }{n}$
  $\frac{2\varepsilon }{n}$