The graph shows how the potential difference V across an electrical component varies with current I in the component.
A tangent has been drawn on the curve at point P for a current of I$_2$.
What is the resistance of the electrical component when the current in the component is I$_2$?
1 )
$\frac{{{V_3} - {V_1}}}{{2{I_2}}}$
2 )
$\frac{{{V_3}-{V_1}}}{{{I_3} - {I_1}}}$
$\frac{{{V_2}}}{{{I_2}}}$
4 )
$\frac{{2{V_2}}}{{{I_2} - {I_1}}}$
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