Exam-style question
Try this first
A circuit has a total potential difference of 12 V and the total resistance is 4 Ω. Calculate the current flowing through the circuit. Scenario focus: a current-measurement example, where the response must not confuse amps with volts or ohms.
Model answer
What a good answer should say
- The current flowing through the circuit is 3 A.
Explanation
Why this works
The correct answer is The current flowing through the circuit is 3 A.. In this version, the deciding idea is a current-measurement example, where the response must not confuse amps with volts or ohms.
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.