A
primary voltaic cell makes use of a dilute solution of sulphuric acid in which
one plate each of copper and zinc Is dipped. The electricity in this cell Is
produced due to the migration of electrons from the zinc plate to copper plate
in the dilute sulphuric acid solution. In fact, dilute sulphuric acid provides
the path for the movement of electrons. In a similar way, potatoes act like the
solution of dilute sulphuric acid between the copper and zinc strips which are
used for producing electricity from potatoes.
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| *** MATERIALS REQUIRED *** |
- Take 8 medium-sized potatoes and insert a strip of zinc on one end of each potato. Similarly, insert one copper strip on another end of each potato.
- Arrange these potatoes on a table in two rows, each containing four potatoes.Connect the zinc strip of one potato to the copper strip of the other with the copper wire. Connect all zinc and copper strips with the help of the copper wire.
- Now, take one wire connected to the zinc strip and one wire from the copper strip and connect these two with the 4.5 volt bulb. You will see that the bulb Immediately glows because the whole assembly acts as a battery. The bulb will glow only for a limited time.
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