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7.2 The motor effect

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Question 5

An automatic watering system contains a valve controlled by an electromagnet. A spring holds an iron plunger in the position that stops the water. Pulling the plunger towards the electromagnet opens the valve.

Explain how the control circuit can open the valve and then stop the water flow.

[2]
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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