Calculate the resistance of a wire 1.0km long and 0.50mm diameter if the resistivity of Copper is 1.7*10^-8ohms meter
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Given,
Length of wire is 1.0km or we can say 1000m
Diameter of wire is 0.50mm or we can say 0.5 × 10^-3 m
Resistivity is 1.7×10^-8
Now resistance = resistivity × l/a
= (1.7×10^-8 × 1000)/0.5×10^-3
= 3.4×10^-2 ohm
Length of wire is 1.0km or we can say 1000m
Diameter of wire is 0.50mm or we can say 0.5 × 10^-3 m
Resistivity is 1.7×10^-8
Now resistance = resistivity × l/a
= (1.7×10^-8 × 1000)/0.5×10^-3
= 3.4×10^-2 ohm
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