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A given wire of resistance 10ohms has a length of 5m and a cross sectional area of four multiple by ten raise to power minus three meter square.Calculate the conductivity of the wire (ssce June 1995)

Respuesta :

Answer:

[tex]\sigma = 125 siemens/m[/tex]

Explanation:

Resistance, R = 10 ohms

Length, l = 5 m

Cross Sectional Area, A = 4 x 10⁻³ m²

Resistivity, [tex]\rho = \frac{RA}{l}[/tex]

[tex]\rho = \frac{10 * 4 * 10^{-3}}{5} \\\rho = 0.008 \Omega -m[/tex]

Conductivity = 1/Resistivity, i.e [tex]\sigma = 1/ \rho[/tex]

[tex]\sigma = 1/0.008\\\sigma = 125 siemens/m[/tex]

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