Question

With the increase in temperature, the resistance of a pure metal ____.

• A. increases
• B. decreases
• C. does not change
• D. first increases and then decreases

Answer 1

The correct option is A

increases

With the increase in temperature, the random motion of electrons increases. As a result, the number of collisions of electrons with the positive ions increases in a metal. Hence, the resistance of a metal increases with increase in temperature.