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

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Question 26

A moving-coil microphone records two sounds from an electronic warning buzzer. For the second sound, the maximum induced current is smaller, but the current completes the same number of cycles in a fixed time.

What happens to the sound from the first recording to the second recording?

[1]
A

The loudness is unchanged and the pitch decreases.

B

The loudness increases and the pitch is unchanged.

C

The loudness decreases and the pitch is unchanged.

D

The loudness decreases and the pitch increases.

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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