Knowledge Organiser
Department: Physics Combined Year:
Term: Topic: Magnetism
Key Words By the end of this unit you will need to be able to:
(page numbers relate to the textbook available on teams)
The force acting between two north poles Repulsion
The end of a magnet Magnetic pole Know what is meant by the poles of a magnet and be able to plot the
A region where there is a force on magnetic materials Magnetic field magnetic field around a bar magnet. P140-141
or current-carrying wires Describe magnetic materials and what induced magnetism is. P141
A magnetic material Nickel Describe the Earth’s magnetic field and how the magnetic and geographic
Magnet formed by an electric current flowing through Electromagnet poles are not the same. P142
a solenoid with an iron core
Understand the magnetic effect of a current and be able to draw the
Device that increases an alternating potential Step-up transformer
magnetic field around a conducting wire and a solenoid. P143 and 144
difference from the primary to secondary coil
A material that is magnetic only when it is placed in Induced magnet Describe the force on a wire in a magnetic field. P145
the magnetic field of another magnet Understand and be able to use Fleming’s left-hand rule P145
Device in a d.c motor that allows the motor to spin Split-ring commutator Know the meaning of magnetic flux density and calculate the force on a
without reversing direction wire in a magnetic field. P146-147
When a force between two objects draws them closer Attract Describe the motor effect and how a motor works. P150-151
together they will do this Know the factors that can change the speed and direction on a motor.
Object or material that produces its own magnetic Permanent magnet P150-151
field Explain how a dynamo generates direct current. P151
A device that produces a direct current from the Dynamo Know how transformers work, and the difference between step-up and
rotation of a coil in a magnetic field step- down transformers. P152-153, 280-281
A coil of current-carrying wire that generates a Solenoid
magnetic field
Equations for this unit – you will not be expected to know these but will be given
Device that decreases an alternating potential Step-down
them in the exam
difference from the primary to secondary coil transformer
A link or association between two variables, so that Correlation
force on a conductor (at right angles to a magnetic field) carrying a current =
one changes so does the other
magnetic field strength x current x length
Interaction between a magnetic field and a current- Motor effect
carrying wire that causes the wire to move
potential difference across primary coil x current in primary coil = potential
The slope of a graph Gradient
difference across secondary coil x current in secondary coil
Network of cables that links power stations to National grid
consumers across the country
Unit of magnetic flux density Tesla potential difference across primary coil = number of turns on primary coil
potential difference across secondary coil number of turns on secondary coil
Shows which way a current-carrying wire will move Fleming’s left-hand
when placed in a magnetic field rule
The amount of magnetic flux in a given area Magnetic flux density
Department: Physics Combined Year:
Term: Topic: Magnetism
Key Words By the end of this unit you will need to be able to:
(page numbers relate to the textbook available on teams)
The force acting between two north poles Repulsion
The end of a magnet Magnetic pole Know what is meant by the poles of a magnet and be able to plot the
A region where there is a force on magnetic materials Magnetic field magnetic field around a bar magnet. P140-141
or current-carrying wires Describe magnetic materials and what induced magnetism is. P141
A magnetic material Nickel Describe the Earth’s magnetic field and how the magnetic and geographic
Magnet formed by an electric current flowing through Electromagnet poles are not the same. P142
a solenoid with an iron core
Understand the magnetic effect of a current and be able to draw the
Device that increases an alternating potential Step-up transformer
magnetic field around a conducting wire and a solenoid. P143 and 144
difference from the primary to secondary coil
A material that is magnetic only when it is placed in Induced magnet Describe the force on a wire in a magnetic field. P145
the magnetic field of another magnet Understand and be able to use Fleming’s left-hand rule P145
Device in a d.c motor that allows the motor to spin Split-ring commutator Know the meaning of magnetic flux density and calculate the force on a
without reversing direction wire in a magnetic field. P146-147
When a force between two objects draws them closer Attract Describe the motor effect and how a motor works. P150-151
together they will do this Know the factors that can change the speed and direction on a motor.
Object or material that produces its own magnetic Permanent magnet P150-151
field Explain how a dynamo generates direct current. P151
A device that produces a direct current from the Dynamo Know how transformers work, and the difference between step-up and
rotation of a coil in a magnetic field step- down transformers. P152-153, 280-281
A coil of current-carrying wire that generates a Solenoid
magnetic field
Equations for this unit – you will not be expected to know these but will be given
Device that decreases an alternating potential Step-down
them in the exam
difference from the primary to secondary coil transformer
A link or association between two variables, so that Correlation
force on a conductor (at right angles to a magnetic field) carrying a current =
one changes so does the other
magnetic field strength x current x length
Interaction between a magnetic field and a current- Motor effect
carrying wire that causes the wire to move
potential difference across primary coil x current in primary coil = potential
The slope of a graph Gradient
difference across secondary coil x current in secondary coil
Network of cables that links power stations to National grid
consumers across the country
Unit of magnetic flux density Tesla potential difference across primary coil = number of turns on primary coil
potential difference across secondary coil number of turns on secondary coil
Shows which way a current-carrying wire will move Fleming’s left-hand
when placed in a magnetic field rule
The amount of magnetic flux in a given area Magnetic flux density
