A uniform wire of length `1` and radius `r` has resistance `100 Omega`. it is recast into a thin
Channel: Doubtnut
Date: 2020-08-30

A uniform wire of length `1` and radius `r` has resistance `100 Omega`. it is recast into a thin  wire of (i) length `2l` (ii) radius `r//2`. Calculate the resistance of new wire in each case.