For a cell, the graph between the potential difference (V) across… - Vidyadip

MCQ

For a cell, the graph between the potential difference $(V) $ across the terminals of the cell and the current $(I)$ drawn from the cell is shown in the figure. The $e.m.f.$ and the internal resistance of the cell are

A
$2\,V$, $0.5\,\Omega $
✓
$2\,V$, $0.4\,\Omega $
C
$ > 2\,V$, $0.5\,\Omega $
D
$ > 2\,V$, $0.4\,\Omega $

✓

Answer

Correct option: B.

$2\,V$, $0.4\,\Omega $

b
E.m.f. is the value of voltage, when no current is drawn from the circuit so $E = 2\,V$.

Also $r = $ slope $=\frac{2}{5} = 0.4\,\Omega $

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