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The figure shows a plot of terminal volt...

The figure shows a plot of terminal voltage 'V' verus the current 'I' of a given cell. Calculate from the graph (a) emf of the cell and (b) internal resistance of the cell.

Text Solution

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(a) For emf of the cell, current I = 0
Then T.P.D. = 6V (Maximum)
called emf of the cell so emf = 6V
(b) From `V= E-IR`
`V = 4V " " I = 1` Amp
`4 = 6 - 1.r rArr r = 6 -4 = 2 Omega`
= Internal Resistance of the cell.
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