calculate the resistance of a copper wire 1km long and 0.50mm in diameter. lf the resistivity of copper is 1.7×10^-8
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Answer:
39.37Ohm
Explanation:
Length=1km=1000m
d=0.55mm=0.55x10^-3
resistivity=1.7x10^-8
R=ρL/A
R = ρL/πr^2
R = ρL/π(D/2)^2
put values
R = 1.7x10^-8 x 1000/ 3.14(0.55x10^-3/2)^2
R = 39.37
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