Question

determine the resistance of a copper wire having a length of 1 km and diameter 0.5 mm Plz answer this...

Answer 1

Answer:

R = 85 $\omega$

Explanation:

Given:

Length = L=  1km= 1000m

Diameter = D= 0.5mm = 5 × 10^-4 m  

Radius = R = 2.5 × 10^-4 m

Area = A = 22/7 × (2.5 × 10^-4)²

Formula:

R = (resistivity × length)/Area of cross section

R = (1.72 × 10^-8 × 1000)/ 22/7 × 6.25 × 10^-8

R = (1.72 × 7000/22 × 6.25) ohm

R = 85 ohm

hope helpful ❤

Answer 2

Answer:

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