Question

Which most likely has the greatest conductivity? a warm plastic rod a cool rubber tube a cool lead metal strip a warm copper wire

Answer 1

Plastic and rubber are poor conductors of electricity. So we are now left with lead and copper. As we know that copper is a very good conductor of electricity and it is warm which enables the electrons to move faster and easily, copper is the correct answer.

Answer 2

A cool lead metal strip has the greatest conductivity among the four.

Metals conduct heat more efficiently than other solids. Some electrons (typically one per atom) in metals are not bound to particular atoms but travel freely between them. Of course, this is why metals are such good electrical conductors.