The voltage V and current I v graphs for a conductor at two different temperatures `T_(1) and T_(2)` are shown in the figure. The relation between `T_(1) and T_(2)` is

Options

A. `T_(1) =T_(2)`
B. `T_(1) gt T_(2)`
C. `T_(1) lt T_(2)`
D. nothing can be decided

Answer

B

Explanation

`R = (V)/(I) = ` slope of V-I graph
Resistance of a metallic conductor increases with increase of temperature, hence slope will be more at higher temperature.
`therefore T _(1) gt T _(2)`