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O-LevelPhysicsMagnetism5054/11 · Oct/Nov 2014 · Q361 Mark

Why is a reed relay used in a switching circuit?

Ato switch on a small current using a large current

Bto switch on a small voltage using a large voltage

Cto switch on a large current using a small current

Dto switch on a large voltage using a large current

✓ Correct answer

C: to switch on a large current using a small current

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About this question

Topic: Magnetism, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2014 Paper 1 Variant 1, question 36.

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