Page 1 - Lesson Note

SAI INTERNATIONAL SCHOOL

Class 6
Lesson Notes
Subject- Physics

Ch. – Electricity and Circuits
Subtopic- Electric cells

Types of electric cell:
Primary cell:
 The chemical reaction that converts the chemical energy into electrical
energy is irreversible.
 Primary cells cannot be charged.
 Primary cells cannot be reused once exhausted.
 E.g. - dry cell
 They are generally use in clocks, toys, flashlights and radio.

Secondary cell:
 The chemical reaction that converts the chemical energy into electrical
energy is reversible.
 Secondary ells can be charged.
 It can be reuse.
 They are generally used in trucks, cars and motorcycles.

Solar cell:
 This cell use sunlight to generate electric current.
 They are generally use in street lamps, solar cookers and heaters.