good conductor ,poor conductor,insulator,resistor define thesse
A good conductor is a material that has a high heat or electrical conductivity. Some examples of good conductors are gold, silver, and copper.
A poor conductor is a material that has low heat or electrical conductivity. Some examples of poor conductors are rubber, plastics and gases.
Insulator is a material which resist the flow of electric current and heat.
A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit.