# A copper wire has a length of 1.50 m and a cross sectional area of 0.240 mm2. If the resistivity of copper is 1.70 ✕ 10−8 Ω · m and a poten?

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- Anonymous5 months ago
I just want to give you a hint

A copper wire has a length L of 1.50 m and a cross sectional area A of 0.240 mm2. If the resistivity of copper ρ

cu is 1.70 ✕ 10^−8 Ω · m and a potential V of 10.0 mV volt is applied , what current I will flow through it?

copper resistivity ρcu = 1.70*10^−8 ohm*m = 17.0*10^-3 ohm*mm^2/m

wire resistance R = ρcu*L/A = 17*10^-3*1.50*10^3/240 = 0.106 ohm

I = V/R = 10/0.106 = 94.1 mA

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