Question

state the energy changes in the following cases while in use

(1) washing machine

(2) an electric cell in a circuit

((3)a photovoltaic cell

Answer 1

1.

In a washing machine electrical energy is converted into the mechanical energy. The rotating and oscillating motion of the parts within the machine drives the water and the cloth to wash the cloth.

2.

In a electric cell the chemical energy stored in the cell is converted into usable electrical energy.

3.

In a photovoltaic cell the light energy falling on the cell is converted into usable electrical energy.