Science (086) — AI-generated practice question

Electric potential difference between two points in a circuit is defined as the work done to move a unit positive charge from one point to the other.

Formula:

$$V = \frac{W}{Q}$$

where $V$ = potential difference (in volts), $W$ = work done (in joules), and $Q$ = charge moved (in coulombs).

Its SI unit is volt (V). 1 V = 1 J C⁻¹.

Source: Chapter 11 – Electricity, Section 11.2 Electric Potential and Potential Difference

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• Definition + formula = 2 marks. Examiners award 1 mark each. Do not skip either part.
• The definition must include "unit charge" and "work done" — these are the key phrases.
• Writing the SI unit and its expansion (1 J C⁻¹) adds completeness and is expected in board answers.
• The formula $V = W/Q$ is Eq. (11.2) from the textbook — use exactly this form.