Find the voltage drop (in volt) along a 93.4 meter long 10 gauge copper wire carrying acurrent of 72.5 A. The diameter of a 10 gauge wire is 2.5882 millimeters.

Question

Physics

Nehemiah Levy

11 July, 03:26

Find the voltage drop (in volt) along a 93.4 meter long 10 gauge copper wire carrying acurrent of 72.5 A. The diameter of a 10 gauge wire is 2.5882 millimeters.

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Allyson Hutchinson · Answer 1

Answer: 5.41 V

Explanation:in order to explain this result we have to use the Ohm law given by:

ΔV=R*I where R is the resistance which is equal R = ρ*L/A. ρ is the resistivity, L the length of the wire and A is the cross section. I is the current.

Then we have

ΔV=ρ*L*I/A = 1.68 * 10^-8 Ωm*93.4 m*72.5A/2.1 * 10^-5 m^2=5.41 V