Exam-style question
Try this first
In a circuit, the total energy supplied by the battery is 240 J and the total charge that flows is 10 C. What is the potential difference across the circuit? Scenario focus: an energy-transfer example using charge and potential difference, where joules are required as the final physical quantity.
Model answer
What a good answer should say
- The potential difference across the circuit is 24 V.
Explanation
Why this works
The correct answer is The potential difference across the circuit is 24 V.. In this version, the deciding idea is an energy-transfer example using charge and potential difference, where joules are required as the final physical quantity.
That makes the correct option the one that uses the appropriate electricity quantity and unit, while the distractors either swap related circuit quantities or apply a rule from the wrong circuit situation.
Common mistake
No common mistake is linked to this question yet.