1. Potential difference across terminals of a cell were measured (in volts) against different currents ( in ampere) flowing through the cell. A graph was drawn which has a straight line ABC.Using the data given in the graph determine,
    (I) the emf and
    (ii) the internal resistance of the cell.


v=e-ir ==> r=(e-v)/i=(1.4-1.2)/0.04=5

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Find emf and internal resistance

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Find EMF and internal resistance of a cell

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