Which most likely has the greatest conductivity?

a warm plastic rod

a cool rubber tube

a cool lead metal strip

a warm copper wire

The correct answer is a cool lead metal strip.

Explanation:

Conductivity is defined as the material's extent to allow an electric current to flow through it. It is inversely related to the temperature.

With increase in temperature, the conductivity decreases.

From the given options:

Plastic rod is an insulator and hence, we will not have conductivity.

Rubber tube is an insulator and hence, we will not have conductivity.

Lead metal strip is a conductor and it will show conductivity and its conductivity will be high because the temperature is low.

Copper wire is a conductor and it will show conductivity but its conductivity will be less because the temperature of the material is high.

Hence, the correct answer is Option 3.

the answer is a. hope this .