Exam-style question
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A potential divider circuit consists of two resistors, R1 = 4 Ω and R2 = 6 Ω, connected in series across a 12 V supply. Calculate the output voltage across R2. Scenario focus: a potential-divider sensor circuit, where the output voltage changes because resistance ratio changes.
Model answer
What a good answer should say
- The output voltage across R2 is 7.2 V.
Explanation
Why this works
The correct answer is The output voltage across R2 is 7.2 V.. In this version, the deciding idea is a potential-divider sensor circuit, where the output voltage changes because resistance ratio changes.
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.