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A transformer diagram with a square iron core. The primary coil on the left has 1600 turns and is connected to a 240 V a.c. mains electricity supply. The secondary coil on the right has 80 turns and is connected to an output device.

An alternating current (a.c.) transformer is used to power an electronic device as shown.

a.

What material is used to make the core of the transformer? Give the reason for using this material.

[2]
b.

Determine the current in the secondary coil when the power output of the transformer is 9.0 W9.0\text{ W}9.0 W.

The transformer is 100%100\%100% efficient.

[4]

Induced potential, transformers and the National Grid (physics only) (HT only) Questions

Practise AQA GCSE Physics Induced potential, transformers and the National Grid (physics only) (HT only) with exam-style questions for Foundation and Higher tier. 15 questions covering Induced potential (HT only), Uses of the generator effect (HT only), Microphones (HT only), and Transformers (HT only), matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

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Induced potential, transformers and the National Grid (physics only) (HT only) Questions

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