The current flowing through the conductor is directly proportional to the potential difference across its end provides the external condition like temperature,pressure remain constant.
The hindrance offered by the conductor in the flow of current is called as resistance.
S.I unit ohm.
Conductivity is defined as the inverse of resistivity.
Limitation of ohms law
1.change in nature of material occur with passage of current.
2.increase of current possible of decrease in voltage.
3.decrease of current is possible decrease in voltage.
Ohmic and non ohmic conductor
The conductor which obeys ohms law is called ohmic conductor.
The conductor which do not obeys the ohms law is called non ohmic conductor.