6.2.ELECTRIC MOTORS:
An electric motors is a divice that can transform electrical energy into movement.It uses the forces of attraction and repulsion between a magnet and an electrically-charged wire.
















6.3.RELAYS:
Is an electromagnetic component that Works as a switch.When electricity passes through the coil,it acts like a magnet.The coil attracts a moveable metal contact towards another fixed contract.When the electricity stops flowing,the moveable contact goes back to its original position.