A) More if the experiment is performed at higher temperature
B) More if a wire of steel of same dimension is used
C) More if the length of the wire is increased
D) Less if the length of the wire is increased
Correct Answer: D
Solution :
Slope of V-i curve \[=R\,\left( =\frac{\rho l}{A} \right)\]. But in given curve axis of i and V are interchanged. So slope of given curve \[=\frac{1}{R}\left( =\frac{A}{\rho l} \right)\] i.e. with the increase in length of the wire. Slope of the curve will decrease.
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