8.nd the resistance of variable cross section wire having radious small section a large section b. And length of wire L. (resistivity of wire is given rho)
![A wire has variable cross-sectional area. The cross-sectional area at Y is double that at X. - YouTube A wire has variable cross-sectional area. The cross-sectional area at Y is double that at X. - YouTube](https://i.ytimg.com/vi/RytKxIKAOT4/maxresdefault.jpg)
A wire has variable cross-sectional area. The cross-sectional area at Y is double that at X. - YouTube
![Calculate the area of cross-section of a wire if its length is 1.0 m its resistance is 23 Ω - YouTube Calculate the area of cross-section of a wire if its length is 1.0 m its resistance is 23 Ω - YouTube](https://i.ytimg.com/vi/3hzXtQ94uvc/sddefault.jpg)