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

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Question 27
H

A student states that a step-up transformer increases the power supplied to a circuit. Why is the student wrong?

[1]
A

A transformer reduces the power, because energy is stored in the iron core

B

A transformer reduces the power, because the secondary current is smaller

C

A transformer cannot change power, because the coils are joined by the core

D

A transformer cannot increase power, because output cannot exceed input

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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