LEARN IT 7: Magnetism and electromagnetism

Where on a magnet is the magnetic field the strongest?

What happens when two magnets are brought close together?

What type of force is the magnetic force an example of?

What is a permanent magnet?

What is an induced magnet?

What is a magnetic field?

What are magnetic materials?

What happens when magnetic materials are placed in a magnetic field?

How is the force between two magnets different to the force between a magnet and a magnetic material?

Describe how to plot the magnetic field pattern around a bar magnet

Sketch the magnetic field around a bar magnet

How does the strength of the magnetic field around a bar magnet vary?

What is a compass?

Sketch/label a diagram to show how a compass works to show that the core of the Earth is magnetic

Electromagnetism

A wire can have a magnetic field around it if it has a ___________ flowing through it

Sketch the magnetic field around a current carrying wire

How can you use the right hand thumb rule to work out the magnetic field around a current-carrying wire?

How can the strength of the magnetic field in a current carrying wire be increased?

How can the magnetic field pattern around a current-carrying wire be reversed?

What is a solenoid?

What is the magnetic field pattern around a solenoid?

What is the difference between a solenoid and an electromagnet?

What happens when a conductor carrying a current is placed in the magnetic field of a magnet?

How can you calculate the size of the force acting on a conductor in a magnetic field?

How can you increase the strength of the force acting on a conductor in a magnetic field?

How can you reverse the force acting on a conductor in a magnetic field?

How is Fleming’s left hand rule used?

What happens to the force on a conductor in a magnetic field if it is not at 90°?

How can you increase the speed of a dc motor?

How can you reverse the direction of the dc motor?

Symbols, names and units for equations