Exam-style question
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If a capacitor has a capacitance of 10 µF and is charged to a potential difference of 5 V, how much energy is stored in the capacitor? Scenario focus: transformers in a distinct A-Level Physics fields context; identify the field quantity, source, direction, and unit before selecting the answer.
- A.0.125 mJ
- B.0.25 mJ
- C.0.5 mJ
- D.0.75 mJ
Model answer
What a good answer should say
- 0.125 mJ
Explanation
Why this works
The correct answer is 0.125 mJ. This is correct for Capacitance because the stem is testing transformers; 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.