Categorie: Tutti - magnetism - electricity - electrons

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101

ELECTRICITY AND MAGNETISM

Magnetism is an unseen force that can occur between magnetic objects or materials like iron. Magnetic fields are visualized using iron filings, showing the influence of bar magnets, which have two poles—

ELECTRICITY AND MAGNETISM

ELECTRICITY AND MAGNETISM

Electromagnets

Speakers and microphones
Electric bell
Maglev

Electromagnetism

Electrical generators in power stations
Michael Faraday
Andre-Marie Ampere
Hans Christian Oersted

The Earth's magnetic field

The centre of the Earth is made of liquid iron
Why the magnetosphere is important?
The compass
The magnetosphere

Magnetism

Is an invisible force between two magnetic objects or between two magnetic objects or between a magnetic object and an object made of magnetic materials such as iron.

How we can identify a magnet?
Magnets atract

Other substances

Other magnets

Magnets and magnetic field
To represent we draw lines

The lines are the position of the filings.

Iron fillings

We can see the magnetic field of a bar magnet using iron filings.

Bar magnets are permanent magnets
Two poles

Negatively charge

Positively charge

Created by electrons
Magnetic force

Electricity in action

Electricity can be found in nature. Electricity is transported to our homes through wires and cables. High voltage electricity is very dangerous.

Being safe when you use electricity


Electricity is very useful but it can be dangerous.

Generating electricity

Electricity can produce heat, light, magnetism, sound and movement.

Electric animals

Electric eels can discharge up to 600 volts.

Static electricity

In a storm cloud, small bits of ice bump into each other as they move move around. This causes and electrostatic charge to build up in the clouds. When the charge is too big, giant sparks called lighting bolts are produced.

Electricity

Electryc circuits
Two terminals

Conductor

Battery
Switch
Electryc current
Negative
Positive
Atoms
Nucleus

Electrons

Negative charge

Neutrons

Neutral

Protons

Positive charge