A cell can supply currents of 1 A and 0 . 5 A via resistances of 2 . 5 Ω and 10 Ω respectively. The internal resistance of the cell is

Question

A cell can supply currents of 1 A and 0 . 5 A via resistances of 2 . 5 Ω and 10 Ω respectively. The internal resistance of the cell is, 2 Ω, 3 Ω, 4 Ω, 5 Ω

MARKS App · Accepted Answer

Let the internal resistance of the cell be r and the potential difference be V . Then, 1 = V 2 . 5 + r And 0 . 5 = V 10 + r Solving the above two equations simultaneously, r = 5 Ω

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