Question

Electrical cells are the source of energy for the electric circuit. Where does that energy come from?

Inside the cell are a number of chemicals. These chemicals store potential energy. When a cell is in a

complete circuit, the chemicals react with each other. As a result, electrons are given the potential

energy they need to start moving through the circuit. When the electrons move, they have both

potential and kinetic energy. The electric current is the movement of electrons through the

conducting wires.

Cells come in many different sizes. Different sized cells provide different amounts of energy to the

electrical circuit. The types of cells you would use in toys, torches and other small appliances range

in size from AAA, AA, C, D, and 9-volt sizes. AAA, AA, C and D cells usually have a rating of 1,5V,

but the larger cells have a larger capacity. This means that the larger cells will last longer before

going 'flat'. A cell goes flat when it is no longer able to supply energy through its chemical reactions.

Dig.1 Different sized batteries.

When we buy cells in the shop they are usually referred to as batteries. This can be a bit confusing

because a battery is really two or more cells connected together. So, when we refer to a battery in

circuit diagrams, we need to draw two or more cells connected together.​

Answer 1

Answer:

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