Electromagnetism 2

the use of electricity to create magnets

the use of magnets to generate electricity

the interaction between electricity and magnetism

the appearance in nature of objects that have both electric and magnetic fields

motor

electromagnet

galvanometer

Transformer

The magnetic pole is reversed

The number of turns of coils is increased

The coil is made from insulated wire

The magnet is slowly pushed into the coil

An electromagnet is able to detect and measure a small electric current.

An electromagnet is more durable and resistant to industrial processes.

An electromagnet is able to transform electrical energy into mechanical energy.

An electromagnet can easily be de-magnetized by cutting off the flow of electricity.

generator

solenoid

transformer

motor

to produce sounds

to produce an electric field around the wire

to amplify the electric current flowing through the wire

to measure the strength of the electric current in the wire

Move faster

shake the wire very quickly

submerge the wire into a pan of hot water

move a bar magnet in and out of the wire coil

connect the two free ends of the wire so that they form a closed path

200

240

250

60

Step- Up Transformer

Step- Down Transformer

DC Motor

AC Generator

A step-up transformer decreases both voltage and current; a step-down transformer increases both voltage and current.

A step-up transformer increases both voltage and current; a step-down transformer decreases both voltage and current.

A step-up transformer decreases voltage and increases current; a step-down transformer increases voltage and decreases current.

A step-up transformer increases voltage and decreases current; a step-down transformer decreases voltage and increases current.

electromagnet

generator

motor

Transformer

electricity

mechanical energy

heat

chemical energy