1. A magnet can attract magnetic material (e.g. iron, steel, cobalt or nickel) or another magnet placed near it

2. There is a magnetic field around a magnet

3. Like poles repel (north/north)4. Opposite poles attract (north/south)

MagnetsMagnetsMagnetsMagnets

Magnets

Permanent MagnetPermanent MagnetPermanent MagnetPermanent Magnet

Permanent Magnet

Opposite poles attractOpposite poles attractOpposite poles attractOpposite poles attract

Opposite poles attract

Like poles repelLike poles repelLike poles repelLike poles repel

Like poles repel

MagnetsMagnetsMagnetsMagnets

Magnets

1. When an electric current flows through a coil of wire there is a magnetic field around the wire. One end of the coil becomes a north-seeking pole and the other end becomes a south-seeking pole. This is called an electromagnet.

2. Reversing the current in an electromagnet reverses the poles of the electromagnet.

3. Electromagnets are used in simple motors and circuit breakers

ElectromagnetsElectromagnetsElectromagnetsElectromagnets

Electromagnets

SolenoidSolenoidSolenoidSolenoid

Solenoid

ElectromagnetElectromagnetElectromagnetElectromagnet

Electromagnet

ElectromagnetsElectromagnetsElectromagnetsElectromagnets

Electromagnets

ElectromagnetsElectromagnetsElectromagnetsElectromagnets

Electromagnets

ScrapyardScrapyardScrapyardScrapyard

Scrapyard

Electric BellElectric BellElectric BellElectric Bell

Electric Bell

SpeakerSpeakerSpeakerSpeaker

Speaker

Removing iron piece from eyeRemoving iron piece from eyeRemoving iron piece from eyeRemoving iron piece from eye

Removing iron piece from eye

1. When a wire carrying an electric current is placed in a magnetic field it experiences a force. The size of the force increases with;

a) increasing strength of the magnetic field

b) increasing current2. The direction of the force can be

reversed by changing the direction of the current or the magnetic field

Electric MotorsElectric MotorsElectric MotorsElectric Motors

Electric Motors

The Motor EffectThe Motor EffectThe Motor EffectThe Motor Effect

The Motor Effect

The Motor EffectThe Motor EffectThe Motor EffectThe Motor Effect

The Motor Effect

Electric MotorElectric MotorElectric MotorElectric Motor

Electric Motor

Electric MotorElectric MotorElectric MotorElectric Motor

Electric Motor

Electric MotorElectric MotorElectric MotorElectric Motor

Electric Motor

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Quiz

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