Exam-style question
Try this first
Which of the following statements is true regarding resistance in a circuit?.
- A.Resistance is independent of wire length
- B.Resistance increases with cross-sectional area
- C.Resistance decreases with increasing length
- D.Resistance increases with increasing length
Model answer
What a good answer should say
- Resistance increases with increasing length
Explanation
Why this works
Resistance in a conductor is directly proportional to its length. According to the formula R = ρ(L/A), as the length (L) increases, resistance (R) also increases, assuming resistivity (ρ) and cross-sectional area (A) remain constant.
Common mistake
No common mistake is linked to this question yet.