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7.3 Induced potential, transformers and the National Grid (HT only)

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Question 16

A transformer in a low-voltage lighting system is 100% efficient. The primary coil has 2000 turns and the secondary coil has 100 turns. The current in the secondary coil is 4.0 A. What is the current in the primary coil?

[1]
A

20 A

B

80 A

C

0.20 A

D

4.0 A

Markscheme

7.3 Induced potential, transformers and the National Grid (HT only) Questions

  1. GCSE
  2. /Physics
  3. /7.3 Induced potential, transformers and the National Grid (HT only)

96 exam-style questions on AQA GCSE Physics 7.3 Induced potential, transformers and the National Grid (HT only), covering 7.3.1 Induced potential (HT only), 7.3.2 Uses of the generator effect (HT only), 7.3.3 Microphones (HT only), and 7.3.4 Transformers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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