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Physics Current Electricity Level: High School

Number 10 copper wire (radius = 1.3mm) is commoly used for electrical installation in homes .What is the voltage drop in 40 m of #10 copper wire if it carries a current of 10A? (The resistivity of copper is 1.7 x 10-8 ohm.m .)

a. 1.3 V

b. 0.77 V

c. 0.50 V

d. 0.13 V