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13.2 Transformers and the National Grid

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Question 40
F

A transformer is 100% efficient. Its secondary supplies 2.5 A at 24 V for 3.0 minutes.

How much energy is transferred to the primary circuit during this time?

[1]
A

180 J180\ \mathrm{J}180 J

B

1800 J1800\ \mathrm{J}1800 J

C

4320 J4320\ \mathrm{J}4320 J

D

10800 J10800\ \mathrm{J}10800 J

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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