Physics

Problem

Which of the following correctly relates the resistance

R

of a uniform wire to its resistivity

\rho

, length

l

, and cross-sectional area

A

? a)

R = \dfrac{A}{\rho l}

R = \rho \dfrac{l}{A}

R = \dfrac{\rho}{lA}

R = \dfrac{l}{\rho A}