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13.2 Transformers and the National Grid

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Question 45
F

A transformer is 100% efficient. Its secondary supplies an appliance that transfers 18 kJ of energy in 2.0 minutes.

The primary potential difference is 250 V.

What is the primary current?

[1]
A

0.60 A0.60\ \mathrm{A}0.60 A

B

0.036 A0.036\ \mathrm{A}0.036 A

C

3.6 A3.6\ \mathrm{A}3.6 A

D

36 A36\ \mathrm{A}36 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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