Exam-style question
Try this first
A capacitor is charged to a potential difference of 6 V and stores 18 C of charge. What is its capacitance?.
- A.3 F
- B.12 F
- C.18 F
- D.6 F
Model answer
What a good answer should say
- 3 F
Explanation
Why this works
We use the formula C = Q / V. Substituting the values gives C = 18 C / 6 V = 3 F.
Thus, the capacitance is 3 farads.
Common mistake
No common mistake is linked to this question yet.