Exam-style question
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What is the energy stored in a capacitor with a capacitance of 2 F charged to a potential difference of 10 V? Scenario focus: gravitational fields in a distinct A-Level Physics fields context; identify the field quantity, source, direction, and unit before selecting the answer.
- A.100 J
- B.20 J
- C.50 J
- D.200 J
Model answer
What a good answer should say
- 100 J
Explanation
Why this works
The correct answer is 100 J. This is correct for Capacitance because the stem is testing gravitational fields; the chosen option keeps the field quantity, source interaction, direction, and unit consistent.
The alternatives are weaker because they mix gravitational, electric, magnetic, orbital, or transformer ideas, or they attach the right number to the wrong physical meaning.
Common mistake
No common mistake is linked to this question yet.