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The experiment to verify ohm's law and to find 3 different wires and the graph are plotted as shown.

$(a)\;R_1 > R_2 > R_3 \\(b)\;R_3 > R_2 > R_1 \\(c)\;R_1 > R_3 > R_2 \\(d)\;R_1 > R_3 > R_2 $
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The slope of the straight line passing through origin indicates $\large\frac{V}{I}$ the slope gives the value of R.
Slope of wire 1 is least and of wire 2 is maximum
$\therefore R_1 < R_3 < R_2$
Hence c is the correct answer.
answered Mar 18, 2014 by meena.p

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