Electromagnetism

Electricity and magnetism are inextricably linked.  Indeed the electric and magnetic forces were recognised very early on as different appearances of the same force.  In this topic we see how magnetic fields arise from electric currents, and how a current carrying wire produces a force when it interacts with a magnetic field.  This is at the heart of the electric motor.  There are motors of all sizes from little motors in toys to giant machines that propel ships and pump water in pumped storage schemes.

 

We go on to look at generator effect where a wire moved through a magnetic field generates a magnetic field.  We investigate Faraday's and Lenz's Laws.  We then look at the operation of an alternating current generator.

 

Then we investigate transformers which enable the bulk transfer of electrical energy around the country in the National Grid.

1. Magnetic Effect of an Electric Current

Tutorial 1

Magnetic Fields

Full Page

Go

Tutorial 2

Coils in a Magnetic Field

Full Page

Go

Tutorial 3

Force on Charges in a Magnetic Field

Full Page

Go

Tutorial 4

Flux, Flux Density, and Flux Linkage

Full Page

Go

2. The Generator Effect

Tutorial 5

Electromagnetic Induction

Full Page

Go

Tutorial 6

Simple AC Generators

Full Page

Go

3. The Transformer Effect

Tutorial 7

Transformers

Full Page

Go

Tutorial 8

Transmission of Electricity

Full Page

Go

Tutorial 9

Inductors (Extension material.   SQA Advanced Higher)

Full Page

Go

AS Data Sheet (.pdf file).  Click on the PDF icon.  Download it, print it off, and use it whenever you do a test. 

It will also make very good lavatory reading.  Knowing where a formula can be found will help you no end in the exam.

There is a more detailed treatment of Electromagnetism on my other website, which you can see HERE

Topic Test

Home