What are the causes of resisitance in a conductor?
Answers
Answer:
Resistance :
Resistance of a conductor is defined as the ratio of the potential difference applied across the conductor to the current flowing through it,
Mathematically,
R = V/I
Units of Resistance :
The SI unit of a conductor is ohm.
It is denoted by ( Ω ).
Cause Of Resistance :
The resistance of a conductor implies the opposition, which the conductor offers to the flow of charge through it. When a potential difference is applied across a conductor, an electric field is set up across its two ends.
Due to this, the free electrons gets accelerated. As the electrons move, they collide against the ions and atoms and their motion is thus opposed. This opposition offered by the ions and atoms is termed as the resistance of the conductor.
Answer:
When electric current flows , electron move through a conductor. Moving of electron can collide with metal ions and it will be more difficult to flow the current, hence it causes resistance.