calculate the resistance of 2km long copper wire of radius 2mm (resistivity of copper is 1.72×10 to the power 8
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Hi Friend !!!!
Here is ur answer !!!
length = 2km
= 2000m
Radius = 2mm
= 2×10^-3m
Area = πr²
= 3.14 × 0.002 × 0.002
= 0.00001256
= 1.256×10^-5
Resistance = resistivity ×length /area
= 1.72×10^8×2×10³/1.256×10^-5
= 1.72×2×10^6/1.256
= 2.7388 × 10^6
Hope it helps u : )
Here is ur answer !!!
length = 2km
= 2000m
Radius = 2mm
= 2×10^-3m
Area = πr²
= 3.14 × 0.002 × 0.002
= 0.00001256
= 1.256×10^-5
Resistance = resistivity ×length /area
= 1.72×10^8×2×10³/1.256×10^-5
= 1.72×2×10^6/1.256
= 2.7388 × 10^6
Hope it helps u : )
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