Q. Which of the following graph represents the variation of resistivity ($\rho$) with temperature (T) for copper ?
A) [image:2020_Q133_opt_a.png]
B) [image:2020_Q133_opt_b.png]
C) [image:2020_Q133_opt_c.png]
D) [image:2020_Q133_opt_d.png]
Explanation
[Solution] For a metal like copper, resistivity rises with temperature and the rise is nonlinear (curving upward) over a wide range, as in graph (b). Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.