Exam-style question
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What effect does increasing the length of a wire have on its resistance, assuming the cross-sectional area and material remain constant?.
- A.Resistance decreases.
- B.Resistance remains the same.
- C.Resistance increases.
- D.Resistance fluctuates.
Model answer
What a good answer should say
- Resistance increases.
Explanation
Why this works
The correct answer is Resistance increases.. 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.