Question

How does temperature affect electrical resistance?

A. As temperature increases, electrical resistance decreases.

B. Temperature and electrical resistance are unrelated.

C. As temperature increases to approximately water’s boiling point, electrical resistance decreases. Beyond this, it increases.

D. As temperature falls, electrical resistance decreases.

Answer 1

Temperature affects metal in numerous ways. A higher temperature increases the electrical resistance of a metal, and a lower temperature reduces it. Heated metal undergoes thermal expansion and increases in volume. so the answer is C