Question

due to increase in temperature the resistance of a conductor increases due to increased number of conduction electrons but if there will be more charges there will be more current and current is inversely proportional to resistance then how it increases the resistance of the conductor?

Answer 1

A metal atom can be thought to be made of 2 parts.

1.valence shell where the valence electrons are present which are loosely held and are easily removed from themetal atom.

2.the rest part of the atom which consists of the nucleus and all the shells except the valence shell is called the kernel

According to electron gas theory, a metal is a sea of valence electrons where the positively charged kernels are dipped or immersed. The valence electrons can flow throughout the body of the metal.

With the increase in temperature the kernels vibrate with greater amplitude and creates greater obstacles to the path of free electrons .i. e. the metal’s resistance to the movement of electrons increase. That'swhy resistance of metal increases with temperature.