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Dry Cells
- Dry cells are the most widely used cells today.
- They are called dry because the electrolyte is a moist paste.
- A zinc container acts as the negative terminal.
- A central carbon rod with a metal cap is the positive terminal.
Example 1 — Remote Cell
- A dry cell is put in a TV remote.
- It supplies current to the remote.
- So the remote works.
Example 2 — Used-Up Cell
- A dry cell is used until it is finished.
- It cannot be used again.
- So it has to be disposed of.
Important Points
- A dry cell is a single use cell.
- For many uses, rechargeable batteries are now common.
Definition — Dry Cell
A dry cell is a single use cell with a paste electrolyte, a zinc container as the negative terminal, and a carbon rod as the positive terminal.
