The current-voltage graph for a given speciment at two different temperatures `T_1` and `T_2` are
Channel: Doubtnut
Date: 2020-08-23

The current-voltage graph for a given speciment at two different temperatures `T_1` and `T_2` are shown in the figure. Is the specimen ohmic ?   (b) At which temperature resistance is greater ?    ( c) Which temperature is higher ?