O-LevelPhysicsElectricity5054/11 · May/June 2014 · Q331 Mark

A single electrical component is placed inside a box. Two leads from the component emerge from the box. These leads are connected in series to an open switch S, a battery and an ammeter. The switch S is closed and the ammeter registers a current. For a few minutes, the size of the current gradually increases. What is the component inside the box?

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Acapacitor

Bfilament lamp

Cfixed resistor

Dthermistor

✓ Correct answer

D: thermistor

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2014 Paper 1 Variant 1, question 33.

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