Exam-style question
Try this first
In a parallel circuit, two resistors R1 = 12 Ω and R2 = 3 Ω are connected. What is the total resistance? Scenario focus: a parallel-branch circuit, where the answer must use the reciprocal resistance relationship.
- A.2.4 Ω
- B.4 Ω
- C.15 Ω
- D.9 Ω
Model answer
What a good answer should say
- 4 Ω
Explanation
Why this works
The correct answer is 4 Ω. In this version, the deciding idea is a parallel-branch circuit, where the answer must use the reciprocal resistance relationship.
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.