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

The Answer To Your Question Is C!

C. a cool lead metal strip

Explanation:

Conductors are materials that allow for an unrestricted flow of electrons i.e. they conduct electricity. Metals are considered as good conductors of heat and electricity. For metals, electrical conductivity decreases with temperature due to the increase in collision frequency between electrons which in turn decrease their mobility.

Insulators, in contrast restrict the flow of current. These include plastics, rubber, wood.

Therefore:

A) warm plastic is an insulator and will not conduct

B) cool rubber tube is also an insulator

C) cool lead metal strip is a conductor

D) warm copper wire is also a conductor

Between the conductors, C and D, the lead strip will have the greatest conductivity since it is a metal and is also at a lower temperature relative to the copper wire.

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