O-LevelPhysicsElectricity5054/12 · May/June 2025 · Q281 Mark

A quantity is defined as the work done by a source in moving unit charge around a complete circuit. What is the quantity and what is its unit?

Aelectromotive force, N

Belectromotive force, V

Cpotential difference, N

Dpotential difference, V

✓ Correct answer

B: electromotive force, V

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2025 Paper 1 Variant 2, question 28.

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