Exam-style question
Try this first
What is the formula for calculating resistivity?.
- A.R = rho L / A
- B.R = V / I
- C.R = I / V
- D.R = A / L
Model answer
What a good answer should say
- R = rho L / A
Explanation
Why this works
The formula for resistivity is R = rho L / A, where R is resistance, rho is resistivity, L is the length of the conductor, and A is the cross-sectional area. This relationship shows how resistivity is a material property.
Common mistake
No common mistake is linked to this question yet.