Question

The electrical resistance of metals : (a) increases with an increase in temperature (b) decreases with an increase in temperature (c) is independent of temperature (d) none of the above​

Answer 1

Answer:

The electrical resistance of metals increase with an increase in temperature.

Explanation:

The resistance of a conductor increases with an increase in temperature because  the thermal velocity of the free electrons increases as the temperature increases. This result in an increase in the number of collision between the free electrons. Therefore if we raise the temperature of a metallic conductor, the resistance will increase.