O-LevelPhysicsElectricity5054/12 · Oct/Nov 2014 · Q221 Mark

A positively charged rod is held close to an earthed metal sphere.. What describes the charge on the metal sphere?

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AIt is negative because electrons are attracted towards the rod.

BIt is neutral because electrons are attracted towards the rod and protons are repelled.

CIt is neutral because it is earthed.

DIt is positive because protons are repelled by the rod.

✓ Correct answer

A: It is negative because electrons are attracted towards the rod.

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2014 Paper 1 Variant 2, question 22.

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