Question

How can you identify the positive terminal of a cell or a battery concealed in a box with the help of a potato? [3 MARKS]

Answer 1

Description: 3 Marks

Cut a potato into two halves and insert the copper wires of a tester connected to 2 ends of the battery. After some time, a greenish blue spot develops around the wire connected to the positive terminal of the battery, . In this way we can identify the positive terminal of the battery.