Generators, Magnets, and Motors
Generators
A generator is a device that produces
electrical energy from mechanical energy.
Generators
Batteries convert chemical energy into
electrical energy
Generators convert mechanical energy
into electrical energy
Hydroelectric Generators
In hydroelectric generators, a magnet and
coil apparatus is moved by the force of falling
water.
Types of Magnets
To generate electricity you must use a permanent magnet
A permanent magnet is a piece of hard
steel alloy that stays magnetized for a long
time.
Types of Magnets An electromagnet is a coil of wire, usually with
an iron core, that becomes magnetized when
current exists in it.
The north and south poles of an electromagnet are reversed.
How a Simple Electric Motor Works
An electric motor is made to work through the interaction
of permanent magnets and electromagnets.
How a Simple Electric Motor Works
Homework Questions
1) What is a permanent magnet?2) What is an electromagnet?3) What does a generator do?4) What is the difference between batteries
and generators?5) How does an electric motor work?6) What part of an electromagnet becomes
magnetized when current electricity exists in it?
