How do I compute the resistance in ohms of a lead block 15 cm long and 0.10 cm2 in cross-sectional area. (ρ = 2.2 x 10-5 ohm-cm)

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06-05-2016
Physics

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How do I compute the resistance in ohms of a lead block 15 cm long and 0.10 cm2 in cross-sectional area. (ρ = 2.2 x 10-5 ohm-cm)

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taskmasters taskmasters · Answer 1 · 2016-05-16T20:28:29-04:00

taskmasters taskmasters

16-05-2016

Resistance is also dependent on the length of a wire where it is expressed as the product of the resistive force and the length of the wire over the cross-sectional area of the wire. Calculation are as follows:

R= pL / A
R = 2.2 x 10^-5 x 15 / 0.10
R = 3.3 x 10^-3 ohms

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