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Electricity, magnetism and electromagnetism
Quick questions on Electromagnetic induction, generators and transformers - CCEA GCSE Physics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is the transformer equation?Show answer
Transformers are vital in the National Grid: step-up transformers raise the voltage for transmission (reducing energy lost as heat in the cables), and step-down transformers lower it again for safe use in homes.
What is q1?Show answer
State two ways to increase an induced voltage. [2 marks]
What is q2?Show answer
Why must a transformer use alternating current? [1 mark]
What is q3?Show answer
A transformer has primary and secondary turns. Is it step-up or step-down? [1 mark]
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