Which of the following is not a conductor of electricity?

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Multiple Choice

Which of the following is not a conductor of electricity?

Explanation:
Electric conductivity hinges on available charge carriers that can move freely. Metals like copper and aluminum have many free electrons that flow easily when a voltage is applied, so they conduct electricity well. Water conducts electricity when it contains dissolved minerals and salts; the ions produced by those substances carry charge and allow current to pass. Plastic, in contrast, is an insulator because its molecules hold onto electrons tightly and do not provide mobile charge carriers. This high resistance prevents current from flowing easily, so plastic does not conduct electricity.

Electric conductivity hinges on available charge carriers that can move freely. Metals like copper and aluminum have many free electrons that flow easily when a voltage is applied, so they conduct electricity well. Water conducts electricity when it contains dissolved minerals and salts; the ions produced by those substances carry charge and allow current to pass. Plastic, in contrast, is an insulator because its molecules hold onto electrons tightly and do not provide mobile charge carriers. This high resistance prevents current from flowing easily, so plastic does not conduct electricity.

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