calculate the resistance of a copper wire 1 km long and 0.50 mm diameter if the resistivity of copper is 1.7 × 10power _8 ohm m
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Resistance = Resistivity × Length/Area
R= (1.7×10^-8)(1×10^3)/ pi×(0.5×10^-3)^2÷4
Resistance= 86.6 ohms
R= (1.7×10^-8)(1×10^3)/ pi×(0.5×10^-3)^2÷4
Resistance= 86.6 ohms
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