The components of a dry cell

The components of a dry cell

ZIMSEC O Level Combined Science Notes: The dry electric cell

  • About 1.5 V is produced in a dry cell
  • This voltage falls as the voltage falls as the cell goes “flat” as the chemicals are used up
  • A dry cell is an adaptation of theĀ simple cell
  • It is also known as a primary cell because the chemicals withing the cell are used up
  • Primary cells cannot be recharged as the chemical reactions which generate current are not reversible
  • The most common dry cells use:
  • zinc as the negative electrode and
  • carbon as the positive electrode
  • Ammonium chloride in paste form is used as the electrolyte
  • Powdered carbon and manganese oxide are placed around the positive electrode to depolarise the cell
  • Dry cells are used to power low power consuming items such as torches and transistor radios
  • They are gradually falling out of favor giving way to rechargeable
  • Nickel-cadmium types as well as other recyclable materials
  • That can be recharged and last longer

To access more topics go to the Combined Science Notes page.

Quick NetOne, Telecel, Africom, And Econet Airtime Recharge

If anything goes wrong, chat with us using the chat feature at the bottom right of this screen