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

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Question 30

A transformer in the power supply for an illuminated sign is 100% efficient. There are 250 turns on the primary coil and 2500 turns on the secondary coil. The current in the secondary coil is 0.030 A. What is the current in the primary coil?

[1]
A

0.0030 A

B

0.30 A

C

0.030 A

D

10 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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