Physics Phenomena of Magnetism

Describe the forces between magnetic poles

Describe the forces between magnetic poles

North pole and south pole attract. Like poles repulse

Describe the forces between magnets and magnetic materials

Magnetic materials are attracted to either poles when unmagnetised

What is induced magnetism?

Induced Magnetism is when a magnetic material is placed in a magnetic field and the material can temporarily be turned into a magnet

Differences between the properties of temporary magnets (made from soft iron) and permanent magnets (made from steel)

A permanent magnet is made out of permanent magnetic materials and will produce its own magnetic field (hard magnetism) A temporary magnet is made of a material which can be turned into a magnet when entering a magnetic field (soft magnetism)

Which elements and alloys are magnetic?

Iron , Cobalt, Nickel and steel

What is a magnetic field?

A magnetic field is a region in which a magnetic pole experiences a force

What is the direction of a magnetic field at a point?

The direction of a magnetic field at a point is the direction of the force on the N pole of magnet at that point

Uses of permanent magnets

Speakers, phones, motors and cards

Uses of electromagnets

MRI machines, generators, headphones

How do diagrams show the relative strength of a magnetic field

The relative strength of a magnetic field is represented by the spacing of the magnetic field lines. If they are closer together it is a strong magnetic field.

Why do magnetic forces happen?

Magnetic fields interact and create a force