$I - V$ characteristic of a copper wire of length $L$ and area of cross-section $A$ is shown in figure. The slope of the curve becomes [image:3_image73.png]

Question

Dr. Abubacker · Accepted Answer

(a) Slope of graph
$= \frac{I}{V} = \frac{1}{R}$
If experiment is performed at higher temperature then resistance increase and hence slope decrease, choice (a) is wrong.
Similarly in choice (b) and (c) resistance increase.
But for choice (d) resistance R increases, so slope decreases

Q. $I - V$ characteristic of a copper wire of length $L$ and area of cross-section $A$ is shown in figure. The slope of the curve becomes

Explanation

Reviewed by Dr. Abubacker

Want more practice?