Calculate the resistance of 1km long copper wire of radius 1mm resistivity of copper is 1.72into minus 8 ohmm
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Given length of copper wire = 1 km = 1000 m
radius = 1 mm = 0.001 m
Resistivity of copper = 1.72 * 10^-8 ohm m
Resistance = resistivity * length/area
= 1.72 * 10^-8 * 1000/π (0.001)²
= 5.472 ohm
The resistance of copper = 5.472 ohm (nearly)
radius = 1 mm = 0.001 m
Resistivity of copper = 1.72 * 10^-8 ohm m
Resistance = resistivity * length/area
= 1.72 * 10^-8 * 1000/π (0.001)²
= 5.472 ohm
The resistance of copper = 5.472 ohm (nearly)
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