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13.2 Transformers and the National Grid

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Question 29
F

A power station supplies electricity at 25 kV25\ \mathrm{kV}25 kV. The transmission cables operate at 400 kV400\ \mathrm{kV}400 kV. A local distribution network operates at 11 kV11\ \mathrm{kV}11 kV.

Transformer X connects the power station to the transmission cables. Transformer Y connects the transmission cables to the local distribution network.

Which description of X and Y is correct?

[1]
A

X is step-up; Y is step-down.

B

X is step-up; Y is step-up.

C

X is step-down; Y is step-up.

D

X is step-down; Y is step-down.

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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