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O-LevelPhysicsMagnetism5054/11 · Oct/Nov 2010 · Q371 Mark

The diagram shows an alarm system in which the switch S is shown closed. What happens when the switch S is opened?

Diagram for this question, from the exam paper

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Airon drops, bell rings

Biron drops, bell stops ringing

Ciron moves up, bell rings

Diron moves up, bell stops ringing

✓ Correct answer

A: iron drops, bell rings

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About this question

Topic: Magnetism, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2010 Paper 1 Variant 1, question 37.

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