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You are reading safety instructions for installing an electric fence and you notice that one of the guidelines is to wear thick rubber soled shoes.

Which of the following is the best physical reason why an electric fence manufacturer would include such a warning in their instructions?

A

The instructions to wear rubber soled shoes is silly, you will be electrocuted if you touch the fence regardless of the shoes you are wearing.

B

The human body is a conductor and the earth is a ground source. If you touch the electric fence without the shoes on the current will go through you to the ground resulting in an electric shock to you. Since the rubber is an insulator, the shoes will soak up the charges and you will not be shocked if you are wearing them.

C

The human body is an insulator, if you are not wearing the shoes and touch the fence, the charge will stay at the point of your body where you touched the fence resulting in an electric shock. Rubber is an even better insulator than the human body, if you are wearing the shoes the charge will stay isolated on the shoes and you will not get shocked.

D

The human body is a conductor and the earth is a ground source. If you touch the electric fence without the shoes on, the current will go through you to the ground resulting in an electric shock to you. The insulating properties of the shoes block the path of the charges from the fence through you to the ground and reduce the risk of an electric shock.

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