# Unit Overview: Magnetism

## Lessons:

13 lessons

### Magnetism

This lesson explores the rules of magnetic attraction, how some materials are magnetic and others not and how to investigate the relationship between the strength of a magnetic field and the distance from a magnet.

• 1 Quiz
• 16m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Magnetic fields

This lesson shows how to plot the shape of a magnetic field, what the shape of the magnetic field between magnets looks like and explores the Earth's magnetic field.

• 2 Quizzes
• 26m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Electromagnetism

The lesson explores electromagnetism and how electrical currents can produce magnetic fields, how those fields can be made stronger and how they can be put to good use.

• 2 Quizzes
• 27m Video
• Presentation(PPT)
• Worksheet
• Transcript

### The motor effect and left hand rule

This lesson explores the interaction between electrical currents and magnetic fields, predicting the direction of the force produced and understanding the factors that affect the size of the force.

• 2 Quizzes
• 23m Video
• Presentation(PPT)
• Worksheet
• Transcript

### F = B x I x l

In this lesson we learn how to apply the equation to calculate the size of the force due to the motor effect and apply it to a range of situations.

• 2 Quizzes
• 44m Video
• Presentation(PPT)
• Worksheet
• Transcript

### DC Motors

In this lesson we apply the motor effect to an electric motor to understand how it can rotate.

• 2 Quizzes
• 23m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Electromagnetic induction and generators

In this lesson we explore how a potential difference can be generated by moving a wire in a magnetic field and how this is used in ac generators to make electricity for the National Grid.

• 2 Quizzes
• 26m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Electromagnetic devices

In this lesson will explore how direct current (DC) is produced by dynamos, comparing the construction of a dynamo to that of a generator and also compare the construction and operation of a loudspeaker and microphone.

• 2 Quizzes
• 29m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Transformers

In this lesson we describe the structure of a transformer, and explain how an alternating current in one coil induces a current in another.

• 2 Quizzes
• 17m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Transformer equations

In this lesson we explain how the ratio of potential differences across the two coils depends on the ratio of turns and carry out calculations linking both transformer equations and relate to advantages of power transmission at high potential differences.

• 2 Quizzes
• 34m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Case Study: Nikola Tesla

In this lesson we learn about the engineering genius of Nikola Tesla and how Tesla's alternating current system won out over Edison's direct current system.

• 2 Quizzes
• 21m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Magnetism Revision (Part 1)

This lesson revises the Magnetism subject knowledge common to both GCSE Combined Science and GCSE Physics and gives an opportunity to work through some exam style questions.

• 2 Quizzes
• 22m Video
• Presentation(PPT)
• Worksheet
• Transcript

### Magnetism Revision (Part 2)

This lesson revises the Magnetism subject knowledge unique to the GCSE Physics course and gives an opportunity to work through some exam style questions.

• 2 Quizzes
• 22m Video
• Presentation(PPT)
• Worksheet
• Transcript