Exam-style question
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In the gravitational-potential graph scenario, a graph of gravitational potential against distance is interpreted for two radii. Which option best applies the AQA A-Level Physics objective to calculate work done moving charge through a potential difference. while avoiding describing potential as a force rather than energy per unit mass?.
- A.field-case-37: Apply Calculate work done moving charge through a potential difference. within Electric potential.
- B.field-case-37: Treat Electric potential as separate from Electric fields, so the measured field idea is not used.
- C.field-case-37: Choose a memorised equation without checking direction, sign, field geometry or units.
- D.field-case-37: Replace the A-Level fields reasoning with a broad GCSE label only.
Model answer
What a good answer should say
- The correct option is field-case-37: Apply Calculate work done moving charge through a potential difference.
- within Electric potential.
Explanation
Why this works
It is correct because it keeps the reasoning inside Electric potential and answers the approved learning objective: Calculate work done moving charge through a potential difference. The other options are weaker because they switch to the wrong fields concept, ignore the measured quantity, lose direction or sign information, or use a generic statement instead of A-Level Physics reasoning.
Common mistake
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