Question

A wire of initial length L₀ and radius r₀ has a measured resistance of 2 Ohms. The wire is drawn under tensile stress to a new uniform radius of r = 0.2r₀. What is the new resistance of the wire? Assume the radius and the length of the wire can change (Assume the radius and the length of the wire can change)

3375 Ohms

69444Ohms

1875Ohms

1250Ohms

Answer 1

Initially, length is to and realius ro. Volarme & [ ho ho rew, redius, de a 0.200. deb, new Volonne should be conabant. length is to Paru 2 و با و کار (0.200² ne ho 0.04futea .و با to R2 ul 0-04 R 142 2 R Ro * P 2 313 LO Roethe e is the resistiverity of the material. 뮴 letter 0.2% oldu 004 RE 0904 20-04 = 1258 02. (last option) 0.04 Х هتل