Exam-style question
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In the capacitor-field mapping scenario, parallel plates are used to map a uniform electric field. Which option best applies the AQA A-Level Physics objective to use Q = CV in capacitor calculations. while avoiding treating electric potential as the same as electric field strength?.
- A.field-case-34: Apply Use Q = CV in capacitor calculations. within Capacitance.
- B.field-case-34: Treat Capacitance as separate from Capacitance, so the measured field idea is not used.
- C.field-case-34: Choose a memorised equation without checking direction, sign, field geometry or units.
- D.field-case-34: 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-34: Apply Use Q = CV in capacitor calculations.
- within Capacitance.
Explanation
Why this works
It is correct because it keeps the reasoning inside Capacitance and answers the approved learning objective: Use Q = CV in capacitor calculations. 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
No common mistake is linked to this question yet.