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13.2 Transformers and the National Grid

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Question 36
F

A transformer is 100% efficient. The input power is 72 W and the secondary potential difference is 12 V.

What is the secondary current?

[1]
A

0.17 A0.17\ \mathrm{A}0.17 A

B

60 A60\ \mathrm{A}60 A

C

6.0 A6.0\ \mathrm{A}6.0 A

D

864 A864\ \mathrm{A}864 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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