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13.2 Transformers and the National Grid

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Question 39
F

An ideal transformer has a primary potential difference of 230 V and a primary current of 0.20 A. It is assumed to be 100% efficient.

A student records a secondary potential difference of 23 V and a secondary current of 0.020 A. Only the secondary current has been recorded incorrectly.

By what factor must the recorded secondary current be multiplied?

[1]
A

100100100

B

101010

C

100010001000

D

100001000010000

Markscheme

13.2 Transformers and the National Grid Questions

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

108 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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