What is the difference between insulator and conductor?
Insulator do not have free electron and very high energy gap. conductor have free electron .
An insulator does not conduct electricity or heat whatsoever. (Eg: Wood) A semi-conductor conducts electricity / heat but with imperfect efficiency. (Eg: Steel) A conductor is simply a term for something that is not an insulator. A super-conductor conducts heat and electricity with almost perfect efficiency.(Eg: Gold)
The main difference between a conductor and an insulator is whether or not the material can conduct electricity. A conductor can and an insulator can not. An insulator blocks the flow of electricity because the outer electrons of their atoms are tightly bound and there is no space for the electricity to move. A loose rule is that most metals are conductors while most non-metals are insulators.
Insulation is keeping the heat inside, trapping it and not letting out. Conduction is letting a flow, such as electricity, pass through the material. for example, metal is a wonderful conductor of heat and electricity, but a bad insulator. However, wool is a good insulator and a bad conductor. :) hope that helps!