Exam-style question
Try this first
Which statement best defines potential difference in an A-Level current-electricity answer?.
- A.Potential difference is energy transferred per unit charge, measured in volts.
- B.Potential difference is charge transferred per second, measured in amperes.
- C.Potential difference is resistance multiplied by time, measured in ohms.
- D.Potential difference is power transferred per kilogram, measured in watts.
Model answer
What a good answer should say
- The correct option is Potential difference is energy transferred per unit charge, measured in volts.
Explanation
Why this works
The other options confuse potential difference with current, force, resistance, power, or a missing-unit answer.
Common mistake
No common mistake is linked to this question yet.