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7.2 The motor effect

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Question 5

A moving-coil earpiece in a hearing aid produces a test tone. The frequency and size of the alternating current in its coil can be adjusted.

The tone is changed to a higher pitch without changing its loudness.

What happens to the alternating current in the coil?

[1]
A

The frequency stays the same and the size of the current variation increases

B

The frequency stays the same and the size of the current variation decreases

C

The frequency increases and the size of the current variation stays the same

D

The frequency decreases and the size of the current variation stays the same

Markscheme

7.2 The motor effect Questions

  1. GCSE
  2. /Physics
  3. /7.2 The motor effect

90 exam-style questions on AQA GCSE Physics 7.2 The motor effect, covering 7.2.1 Electromagnetism, 7.2.2 Fleming's left-hand rule (HT only), 7.2.3 Electric motors (HT only), and 7.2.4 Loudspeakers (HT only). Each one has a worked solution and a mark scheme showing where the marks go.

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