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?