The current - voltage graphs for a given metallic wire at two different temperatures `T_1 and T_2` are shown in the figure.

The temperature `T_2` is greater than `T_1`.

Options

A. `T_(1) gt T_(2)`
B. `T_(1) lt T_(2)`
C. `T_(1) = T_(2)`
D. `T_(1) = T_(2)`

Answer

A

Explanation

Slope of graph will give us reciprocal of resisatnce.
`(as (1)/(V) = (1)/(R ))`
Here resistance at temperatre `T_(1)` is greater than that at `T_(2)`.
Since resistance of metallic wire is max at higher temperature than at lower temperaure, hence `T_(1) gt T_(2)`.