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An engineering student is designing a miniature piezoelectric energy-harvesting system to power a remote wireless sensor.

  • The piezoelectric element generates an alternating potential difference of 0.40 V0.40\text{ V}0.40 V.
  • The sensor's power-management circuit requires a minimum input potential difference of 5.0 V5.0\text{ V}5.0 V to activate.
  • The step-up transformer designed for this system has a secondary coil with 1200 turns1200\text{ turns}1200 turns.

Calculate the number of turns required on the primary coil of this transformer to achieve the required voltage step-up.

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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

  1. GCSE
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  3. /Induced potential, transformers and the National Grid (physics only) (HT only)