`n` identical cells are joined in series with two cells A and B with reversed polarities. EMF of each cell is E and internal resistance is r. Potential difference across cell A or B is (n > 4)

n identical cells are joined in series with two cells A and B with reversed polarities. EMF of each cell is E and internal resistance is r. Potential difference across cell A or B is (n gt 4)

n identical calls are joined in series with its two cells A and B in loop with reversed polarties. EMF of each shell is E and internal resistance r . Potential difference across cell A or B is (here n gt 4 )

A capacitor is conneted to a cell emf E having some internal resistance r . The potential difference across the

A capacitor is conneted to a cell emf E having some internal resistance r . The potential difference across the

If E is the emf of a cell of internal resistance r and external resistance R, then potential difference across R is given as

If E is the emf of a cell of internal resistance r and external resistance R, then potential difference across R is given as