Science (086) — AI-generated practice question

Electric potential difference is defined as the work done to move a unit charge from one point to another in an electric circuit.

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

SI unit: Volt (V)

Definition of 1 volt: The potential difference between two points is said to be 1 volt when 1 joule of work is done in moving a charge of 1 coulomb from one point to the other.

$$1 \text{ V} = 1 \text{ J C}^{-1}$$

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

---

• This is a standard 2-mark question; examiners expect: (1) the definition with formula, and (2) the SI unit with its definition.
• Always write the formula $V = W/Q$ — it shows understanding and often carries a mark.
• "1 V = 1 J C⁻¹" is a frequently tested one-liner; include it when defining the unit.
• Do not confuse potential with potential difference — the question asks about the difference between two points.