Exam-style question
Try this first
In a potential divider circuit, if the resistance of R1 is doubled while R2 remains constant, what happens to the output voltage?.
- A.It doubles
- B.It halves
- C.It remains the same
- D.It increases by a quarter
Model answer
What a good answer should say
- It halves
Explanation
Why this works
The correct answer is It halves. This is correct because it applies the Current electricity idea named in the question, using the required quantities and units rather than mixing current, charge, potential difference, resistance, power, or energy.
The other options are less suitable because they use the wrong electrical quantity, an incompatible unit, or a rule from a different circuit context.
Common mistake
No common mistake is linked to this question yet.