Pessary cell refers to a type of electric cell used as a source of electricity. It is a primary cell that generates electrical energy through chemical reactions, typically consisting of a zinc anode and a carbon cathode. The name "pessary" is derived from the Latin word "pessum," meaning "downward," expressing the downward flow of electricity generated in this cell.
The construction of a pessary cell involves immersing the zinc anode and carbon cathode in an electrolyte solution, most commonly a mixture of ammonium chloride and water. The zinc undergoes oxidation, releasing electrons which flow through an external circuit to generate an electric current. Concurrently, the ammonium cations in the electrolyte react with the carbon cathode, reducing it and completing the chemical reactions within the cell.
Pessary cells are commonly used in applications requiring low and constant power, such as in flashlights, radios, and various low drain devices. While they have a relatively low energy density and limited shelf life compared to other types of cells, pessary cells are highly reliable and cost-effective. They are also easily replaceable, making them suitable for numerous portable and disposable electronic devices.
In conclusion, a pessary cell is a basic type of electric cell that generates electrical energy through chemical reactions between a zinc anode, carbon cathode, and an electrolyte solution. Used primarily in low power applications, pessary cells provide a reliable and affordable source of electricity.
