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13.2 Transformers and the National Grid

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Question 2

A transformer in a school electronics laboratory is assumed to be 100% efficient. Its primary is connected to a 230 V alternating supply and carries a current of 0.30 A. The secondary potential difference is 46 V.

What is the secondary current?

[1]
A

0.060 A0.060\ \mathrm{A}0.060 A

B

1.5 A1.5\ \mathrm{A}1.5 A

C

0.30 A0.30\ \mathrm{A}0.30 A

D

69 A69\ \mathrm{A}69 A

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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