Question

how does the resistance of a conductor change if its temperature is increased​

Answer 1

Answer:

When we heat a conductor, its constituent atoms get excited and start vibrating more.

This means that the free electrons (the ones which give rise to the ‘current’)

there’s a potential difference between the ends of the conductor

collide more and more with the atoms in the conductor and get ‘hindered’. Thus, the conductor becomes more resistant to the flow of current through it.

BUT On the other hand, if you cool a conductor, its atoms vibrate less, and the electrons find it easier to move, making the conductor less resistant.

Explanation: