Factors influencing the resistance of a wire

What is Resistance?

Resistance is caused by collisions between the atoms in the object and the electrons (carrying electricity), which are trying to move through the object. (R = resistance measured in ohms (W)). Basically resistance is the term used to describe an objects resistance to the flow of electricity
Electrons lose their drift velocity only when they collide. The electrical resistance of a conductor is simply a measure of the potential difference required to maintain a current. Basically resistance is a representation of how many electrons are colliding, and how quickly.
An electrical current is caused when free electrons moving through atoms are influenced by either a positive or negative charge. This causes all the electrons to change course. This is what we call an ‘electric current.’
We can work out resistance using Ohm’s law: Ohm's law states that the current in a metallic conductor is directly proportional to the potential difference across it provided the t...