2.4.65 - Potential difference

Use potential difference V = W/Q.

Use - potential difference to connect the rule to the data and decision in the question.

This matters because - potential difference determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - potential difference to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Potential difference is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.