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Take a butter knife and punch two slots into the pear about a quarter inch apart and about a half inch deep. Put a penny in one slot and a dime in the other. If the pear is soft enough you can just push the coins into it without making the slots with the knife. The pear provides the electrolyte between the dissimilar metals. Touch the leads of a volt meter each to one of the coins and you will see current flow.

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14y ago

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