O-LevelPhysicsElectricity5054/12 · Oct/Nov 2019 · Q351 Mark

A hotplate on an electric cooker contains two identical resistors. The switch has three positions. position 1 The two resistors are connected in series to the mains supply. position 2 The two resistors are connected in parallel to the mains supply. position 3 Just one resistor is connected to the mains supply. Which positions correspond to the low, the medium and the high power settings?

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A1 (low) 2 (medium) 3 (high)

B1 (low) 3 (medium) 2 (high)

C3 (low) 1 (medium) 2 (high)

D3 (low) 2 (medium) 1 (high)

✓ Correct answer

B: 1 (low) 3 (medium) 2 (high)

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2019 Paper 1 Variant 2, question 35.

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