There is a protrusion on one end of an electric cell. It is due to the presence of which of the following?
A
Steel rod
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B
Iron rod
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C
Carbon rod
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D
Zinc rod
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Solution
The correct option is C Carbon rod A carbon(graphite) rod is present in the centre of an electric cell and a fixed metal cap is present at the top. This carbon rod results in a protrusion at one end of the cell.