A potato can be used to find the polarity of a cell

True

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False

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Ambiguous

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Data insufficient

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Solution

The correct option is A True
A potato is cut into two halves and the copper wires of a tester are inserted into it. After half an hour, it was noticed that there was a greenish blue spot on the potato around one wire whereas there was no such spot around the other wire. They found that it was always the wire connected to the positive terminal, which had a greenish blue spot around it. This concept could be used for identifying the positive terminal of a cell or a battery concealed in a box.
Hence, A potato can be used to find the polarity of a cell and the statement is true.

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