Exam-style question
Try this first
A capacitor has a capacitance of 5 µF and is charged to a potential difference of 12 V. What is the energy stored in the capacitor? Scenario focus: inverse-square reasoning in a distinct A-Level Physics fields context; identify the field quantity, source, direction, and unit before selecting the answer.
- A.0.36 mJ
- B.0.30 mJ
- C.0.24 mJ
- D.0.12 mJ
Model answer
What a good answer should say
- 0.36 mJ
Explanation
Why this works
The correct answer is 0.36 mJ. This is correct for Capacitance because the stem is testing inverse-square reasoning; 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.