Properties of Magnets
A magnet has _____ poles.
2 poles
State the types of magnets. (2 types)
Permanent magnets and induced magnets.
The region around a magnet where magnetic forces act.
Magnetic field
State what happens when an electric current flows through a wire.
A magnetic field is produced around the wire.
Draw a bar magnet.
Consist of North and South pole
The two poles of a magnet are
North and South
Gold, silver, copper and aluminium. These materials are categorized as what type of materials.
Non-magnetic materials
State the material used to detect the shape of a magnetic field.
Iron filings
A wire coiled into a spiral shape is known as a ________.
Solenoid
Draw the magnetic field lines around a bar magnet.
Direction of magnetic fields must be from the North pole into the South pole.
Unlike poles =
Like Poles =
Unlike poles = Attract
Like poles = Repel
A material that becomes a magnet temporarily when it is placed in a magnetic field.
Induced magnet
Field lines always go from which direction to which direction.
From North to South
What material is commonly used as the core of an electromagnet?
Iron / soft iron
Draw magnetic field lines of two bar magnet attracting each other.
For two bar magnets attracting each other, place the South/North pole of one magnet facing the North/South pole of the other. The magnetic field lines should connect between the opposite poles.
The area of a bar magnet where the magnetic effect is strongest.
Poles
Domains point in the same direction. State what is happening to the magnetic materials.
Becomes magnetised.
State the function of a plotting compass.
Trace the direction of the magnetic field.
State the method used to reverse the magnetic poles of an electromagnet.
Reverse the direction of the electric current flowing through the electromagnet.
Draw magnetic field lines of two bar magnet repelling each other.
For two bar magnets repelling each other, place the South/North pole of one magnet facing the South/North pole of the other. The magnetic field lines should not connect between the same poles.
The process of making an object magnetic and the process of removing or reducing the magnetic field of an object. Name the two process.
Magnetising and demagnetising.
State the process that occurs when a magnet is heated to a high temperature and struck with a hammer and identify the type of magnet involved.
The process of demagnetising a permanent magnet.
For magnetic field lines, state what the spacing between the lines and the arrows on the lines indicate (state the direction of poles).
The strength of an electromagnet depends on:
Draw the magnetic field lines around a solenoid.
Draw a solenoid with several coils and show magnetic field lines running straight inside and curving around outside from the north pole to the south pole.