NEW AQA Transformers GCSE Lesson

A fully resourced lesson designed for the new AQA GCSE specification, from an experienced author.
This lesson includes editable and PDF versions of:
• Power point presentation
• Worksheets with full sets of answers
• Technician’s sheet (fully resourced and illustrated)
• A VLE version of the presentation (with the answers removed)
In addition, it includes an optional self-marking Google Classroom Homework for those of you lucky enough to work in a school with Google Classroom set up.
Other lessons in this topic are available, as is the topic as a whole.
The first lesson “Permanent Magnets” is available free of charge so you can try before you buy.

Objectives covered:
Lesson 9: PHYSICS ONLY Transformers

• Explain how the effect of an alternating current in one coil in inducing a current in another is used in transformers.
• Explain how the ratio of the potential differences across the two coils depends on the ratio of the number of turns on each.
• Calculate the current drawn from the input supply to provide a particular power output.
• Apply the equation linking the potential differences and number of turns in the two coils of a transformer to the currents and the power transfer involved, and relate these to the advantages of power transmission at high potential differences.
• Describe Vs and Vp for a step-up and a step-down transformer.
• Describe the construction of a transformer.