College Physics 10th Edition by Raymond Serway,Chris Vuille

تمرين 67

A 50.0-g sample of a conducting material is all that is available. The resistivity of the material is measured to be 11 × 10 8 · m, and the density is 7.86 g/cm 3. The material is to be shaped into a solid cylindrical wire that has a total resistance of 1.5 . (a) What length of wire is required (b) What must be the diameter of the wire