CBSE Class 12-science Answered

Dear Student,

Kindly refer to page 104 of your Ncert text book part I. In an ohmic resistor the resistivity remains constant with temperature. So the graph will be a straight line parallel to the x axis.

In a metallic resistor like copper, with increase in temperature the resistivity increases.

In case of a super conductor at temperatures below a certain critical temperature the resistivity is zero, as temp increases, the resistivity increases.

Rgds

Topper Expert