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Uses of magnetism

Uses of magnetism

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Question 11

The table below shows parameters for a step-down transformer used in an electrical substation.

ParameterValue
Potential difference across primary coil275 000 V275\,000\text{ V}275000 V
Current in secondary coil2500 A2500\text{ A}2500 A
Potential difference across secondary coil33 000 V33\,000\text{ V}33000 V

Assuming the transformer is 100%100\%100% efficient, calculate the current in the primary coil of the transformer.

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Markscheme

Uses of magnetism Questions

  1. GCSE
  2. /Physics
  3. /Uses of magnetism

16 exam-style questions on OCR GCSE Physics Uses of magnetism. Each one has a worked solution and a mark scheme showing where the marks go.

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