O-LevelPhysicsElectricity5054/12 · May/June 2020 · Q341 Mark

A metal lightning conductor is placed on the top of a tall building. The conductor is connected to Earth. When a charged cloud passes over the building, the metal lightning conductor becomes positively charged. What happens to the lightning conductor to produce a positive charge at its top?

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AElectrons move downwards and protons move upwards in the conductor.

BOnly electrons move in the conductor.

COnly protons move in the conductor.

DProtons in the air attach themselves to the conductor.

✓ Correct answer

B: Only electrons move in the conductor.

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2020 Paper 1 Variant 2, question 34.

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