Explanation:
Insulator: An object that does not conduct the electricity. Its conductivity is very low. It is also known as the poor conductor of electricity. For example, wood, rubber etc.
Conductor: An object that conducts the electricity. Its conductivity is very high. It is also known as the good conductor of electricity. For example, aluminium, copper etc.
Semiconductor: An object that's conductivity lies between the insulator and conductor. Its conductivity is moderate. For example, silicon and germanium.
