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13.2 Transformers and the National Grid

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Question 8

There is an alternating current of 12 A in the primary coil of a transformer.

There is an alternating current of 3 A in the secondary coil of the transformer.

The transformer is 100% efficient.

The size of the potential difference (voltage) across the secondary coil is:

A

four times the size of the voltage across the primary coil

B

one-quarter the size of the voltage across the primary coil

C

four times the size of the current in the primary coil

D

one-quarter the size of the current in the primary coil

Markscheme

13.2 Transformers and the National Grid Questions

  1. GCSE
  2. /Physics
  3. /13.2 Transformers and the National Grid

28 exam-style questions on Edexcel GCSE Physics 13.2 Transformers and the National Grid, covering 13.2.1 Transformers and induction, 13.2.2 The transformer turns-ratio equation, 13.2.3 The National Grid, 13.2.4 The transformer power equation, and 13.2.5 Advantages of high-voltage transmission. Each one has a worked solution and a mark scheme showing where the marks go.

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