$V -I$ graphs for two wires $A$ and $B$ are shown in the figure. If both the wires are made of the same material and are of equal thickness, which of the two is of more length ? Give justification for your answer.
$V -I$ graphs for two wires $A$ and $B$ are shown in the figure. If both the wires are made of the same material and are of equal thickness, which of the two is of more length ? Give justification for your answer.
We know that $V = IR$
For the same current wire $A$ requires more voltage, hence resistance of $A$ is more than that of $B , R =\rho \frac{l}{ A }$
since $\rho$ and $A$ are same for both wires and $R ; l$
$\therefore$ Length of $A$ is more than that of $B$.
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