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

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Question 4
H

Figure shows a transformer.

Figure: A transformer with a primary coil and a secondary coil wound on opposite sides of an iron core

image

a.

The core of the transformer is made from iron. Give the reason why iron is used.

[1]
b.

Give the type of transformer shown in Figure.

[1]
c.

The potential difference across the primary coil is 20 V. Calculate the potential difference across the secondary coil. Use the equation VpVs=npns\displaystyle \frac{V_p}{V_s} = \frac{n_p}{n_s}Vs​Vp​​=ns​np​​

[3]
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)

40 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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