Exam-style question
Try this first
A potential divider circuit has a total resistance of 25 Ω and a supply voltage of 50 V. What is the output voltage across a 10 Ω resistor? Scenario focus: an energy-bill context, where the explanation must distinguish electrical energy from potential difference.
- A.20 V
- B.15 V
- C.10 V
- D.25 V
Model answer
What a good answer should say
- 20 V
Explanation
Why this works
The correct answer is 20 V. In this version, the deciding idea is an energy-bill context, where the explanation must distinguish electrical energy from potential difference.
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.