top of page
Physics-and-Maths-Tuition-with-Sarah-logo
A Level Physics Tutor

Transformers

Introduction
 

Transformers are electrical devices that use electromagnetic induction to increase or decrease alternating voltages. They play a vital role in the National Grid by allowing electrical energy to be transmitted efficiently over long distances with minimal power loss. In this topic, students learn how transformers operate, how voltage depends on the number of turns in each coil, and why transformers are essential in modern electricity distribution.
 

AQA A Level Physics Specification: 3.7.4.5 Transformers
 

What You Need to Know
 

  • Describe the structure and operation of a transformer.

  • Explain that transformers operate using electromagnetic induction.

  • State that transformers require an alternating current (AC) supply.

  • Apply the transformer equation relating potential difference and the number of turns in each coil.

  • Distinguish between step-up and step-down transformers.

  • Explain the conservation of energy in an ideal transformer.

  • Calculate transformer efficiency where appropriate.

  • Explain why transformers are used to reduce energy losses during electricity transmission.
     

Downloadable Topic Pack
 

Transformers Topic Pack Exam Questions and Answers
 

This downloadable resource contains carefully selected AQA A Level Physics exam questions covering transformer operation, step-up and step-down transformers, efficiency, electromagnetic induction and electricity transmission, together with fully worked solutions designed to strengthen understanding and improve exam performance.
 

Related Topics
 

Enquire Now

Testimonials

Success Stories

Gurpreet S

Claire T.

With Sarah's help my daughter managed to gain an A* in her Physics A Level exams (almost 100% on paper 2!) and was able to gain entry to UCL. We are so proud and cannot thank Sarah enough.

Sarah transformed my daughter's approach to Physics. Her examiner insight was invaluable for boosting her final GCSE grade from a 7 to a 9.

S. Ahmed

Professional and encouraging, Sarah's expert coaching helped my son gain admission to Cambridge to study Natural Sciences. Highly recommended.

James R.

The small group sessions are fantastic. They provided the targeted exam practice and confidence my twins needed to excel.

See more testimonials HERE

bottom of page