AQA Trilogy GCSE Science - Science
Mission Objectives
Describe the difference between step-up and step-down transformers and explain their uses in real-world applications
Explain what a transformer does and how they work
Explain how the ratio of the potential difference in the primary coil and secondary coils of a transformer is related to the ratio of turns of wire in the primary and secondary coils
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Words and meanings to learn
transformer
a device that uses electromagnetic induction to change the size of an alternating potential difference; it consists of a primary coil, a secondary coil and an iron core
primary coil
the coil in a transformer where the alternating current is first applied, producing a magnetic field in the iron core
iron core
a soft iron structure in a transformer that links the primary and secondary coils, focusing and strengthening the magnetic field for efficient energy transfer
induced potential difference
a voltage generated in a conductor when it is exposed to a changing magnetic field, as in a transformer or generator
secondary coil
the coil in a transformer where the induced potential difference is generated, transferring energy to the external circuit
Samantha is a dedicated and accomplished science educator with over 15 years of leadership experience in the field, coupled with a strong background in scientific analysis. She has a proven track record of strategically managing educational departments, driving operational efficiencies, and nurturing collaborative relationships with stakeholders.
Samantha previously served as the Head of Chemistry and Sixth Form Tutor, Ilkley Grammar School, Ilkley with extensive Key Stage 4 and 5 teaching experience and leadership. In addition to her teaching and leadership roles, she is also an examiner for AQA, providing her with valuable insight into assessment standards and exam specifications.
In her spare time, Samantha enjoys playing the accordion with her local orchestra and has recently taken up cricket, where she's enthusiastically honing her skills both on and off the pitch!
Transformers practical
Transformer core coils of different numbers of coils (it helps if these scale up in a 2:1 or 3:1 ratio), voltmeters, power packs and wires.
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