Why conductors offer resistance?

Answer 1

Yes , all conductors have some

amount of resistance although it

varies depending on the material

that is conducting the electricity .

Copper has a very low resistance,

and aluminum has a slightly

higher ( but still quite low )

resistance . This is why they are

used as electrical conductors.

Conductor resistance results in

voltage drop over the conductor

and power loss, manifested as

heating of the conductor .

Therefore , you want as low a

conductor loss as is reasonably

practical .

The reason of resistance is that,

no electron has a linear motion

when an electric field is applied to

it . e- move in random due to

apparent collision with other e -' s.

This motion is termed to as

Brownian motion . The random

movement however interrupts

with the electric field and creates

resistance sue to a negetive field

generated .

Answer 2

Current is the flow of electrons through a material. In any material say,metal, the current flow is due to free electrons. There are ions in the metal and they are randomly arranged thus offering opposition to electron flow. It's this opposition that is called resistance.