determine the resistance of a copper wire having a length of 1 km and diameter of 0.5mm.plzz explain this sum to me with detail calculations No Shortcuts at all
Answers
Answered by
18
Hello user
We know that..
R = (resistivity × length)/Area of cross section
1km = 1000m
.5 mm = 5 × 10^-4 m
So, radius = 2.5 × 10^-4 m
So area = 22/7 × (2.5 × 10^-4)^2
From the information in the question, we get
R = (1.72 × 10^-8 × 1000)/ 22/7 × 6.25 × 10^-8
R = (1.72 × 7000/22 × 6.25) ohm
R = 85 ohm
We know that..
R = (resistivity × length)/Area of cross section
1km = 1000m
.5 mm = 5 × 10^-4 m
So, radius = 2.5 × 10^-4 m
So area = 22/7 × (2.5 × 10^-4)^2
From the information in the question, we get
R = (1.72 × 10^-8 × 1000)/ 22/7 × 6.25 × 10^-8
R = (1.72 × 7000/22 × 6.25) ohm
R = 85 ohm
tanishq7363:
10^-4=?
Similar questions