`I-V` characterstic of a copper wire of length `L` and area fo cross-section `A` is shown in Fig. The slope of the curve becomes A. More if the experiment is performed at higher temperatureB. More if a wire of steel of same dimension is usedC. More if the length of the wire increasedD. Less if the length of the twice is increased

`I-V` characterstic of a copper wire of length `L` and area fo cross-s

1.	`I-V` characterstic of a copper wire of length `L` and area fo cross-section `A` is shown in Fig. The slope of the curve becomes A. More if the experiment is performed at higher temperatureB. More if a wire of steel of same dimension is usedC. More if the length of the wire increasedD. Less if the length of the twice is increased
Answer» Correct Answer - D (d) Slope of `V-i` curve `= R(=(rho l)/(A))`. But in given curve axis of `i` and `V` are interchanged. So slope of given curve `= (1)/(R ) (=(A)/(rho l))` i.e., with the increase in length of the wire. Slope of the curve will decrease.

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