The handles of the tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers on them because plastic or rubber is an insulator which does not allow electric ____ to pass through it.

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Detailed Solution

The handles of the tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers on them because plastic or rubber is an insulator which does not allow electric current to pass through it to the body to harm the electrician.

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