Exam-style question
Try this first
What happens to the energy stored in a capacitor when the potential difference across it is doubled? Scenario focus: field energy in a distinct A-Level Physics fields context; identify the field quantity, source, direction, and unit before selecting the answer.
- A.Energy is doubled
- B.Energy is quadrupled
- C.Energy remains the same
- D.Energy is halved
Model answer
What a good answer should say
- Energy is quadrupled
Explanation
Why this works
The correct answer is Energy is quadrupled. This is correct for Capacitance because the stem is testing field energy; 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.