Simple Electric Circuit Magnetism and the Electromagnet

Mechanical Systems (revision)Developed by: Johnny Freese

WCED: METRO SOUTH

CAPS Technology Grade 7Term 3

TYPES OF MAGNETS

HORSE SHOE

BAR MAGNET

MANY TYPES

MAGNETISED & UNMAGNETISED

UNCOMBED HAIR

COMBED HAIR

UNMAGNETISED MAGNETISED

Some metals are attracted to magnets and some are not.

iron

aluminium

nickelsteel

wood

copper plastic

A simple electrical circuit

3 volt battery switch

Light bulbConducting wire

1,5 V 1,5 V

Simple circuit diagram

1,5 volt cell

Conducting wire

switch

Light bulb

SummaryComponent Name Component Picture Symbol

Cell

Switch

Light Bulb

Conducting wires

1,5 V

Simple electromagnet

N SIron nail

Cell

SwitchInsulated copper wire

Magnetic force!

More windings mean a stronger magnet

3 layers of windings

Explain how this electromagnet machine works. Many technologies use electromagnets.