Question

The conductors which do not obey Ohm's law are called?

Answer 1

Hint: Ohm's law: This law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance one arrives at the usual mathematical equation that describes this relationship.
                         $V \propto \,I$
                         $V = RI$
                         $I = \dfrac{V}{R}$
Where,
I is the current through the conductor in units of amperes, V is the voltage measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms.

Complete step by step solution:
Conductors are the type of materials which allow the electrical current to flow through it and it is generally made up of metals like aluminium, copper and the alloys of different metals, in an electrical conductor, the electrical charges move from atom to atom when the potential difference is applied across them. The choice of the conductor can be taken into account by considering the various factors like tensile strength, fatigue strength, cost etc.
An insulator is a type of material that does not conduct electrical current, insulating materials include paper, plastic, rubber, glass and air. Vacuum is also a type of insulator but is not actually a material. Most electrical conductors are covered by insulation so that it could not conduct electrical current.
The conductors which obey ohm’s law are called ohmic conductors and the conductors which do not obey ohm’s law are called non-ohmic conductors.

Note: Superconductors: Superconductors have zero resistance, once a current starts to flow through it, it flows indefinitely or until something, like a magnetic field or a temperature increase, stops it.
Semiconductors: Semiconductors are another class of non-ideal conductors. It can have negative resistance regions in the p to n transition layer.
Types of semiconductors:
1. P type semiconductors
2. N type semiconductors