Electrical Materials CH4 Quiz

Electrical resistivity is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current. It is commonly represented by ($\rho$) in $\Omega\cdot m$.

Electrical conductivity is the reciprocal of electrical resistivity, and measures a material's ability to conduct an electric current. It is commonly represented by ($\sigma$) in S/m.

The resistance between the opposite parallel faces of a solid cube of material is related to resistivity as $R = \rho \times \frac{l}{A}$, where $R$ is the resistance, $\rho$ is the resistivity, $l$ is the length of the conductor in m, and $A$ is the cross-sectional area of the conductor in $m^2$.

<p>A low resistivity indicates a material that readily allows the movement of electric charge.</p> Signup and view all the answers

<p>Conductance is the reciprocal of resistance and is represented by ($G = \frac{1}{R}$). Conductivity ($\sigma$) is related to conductance as $\sigma = \frac{1}{\rho}$.</p> Signup and view all the answers