posted by lllllllll on .
If the length of a wire is doubled and its cross – section area decreased to half ,the resistivity of the wire becomes the same ( put true or false) pleas drwls
Resistivity ( ρ )doesn’t depend on the length and area; it depends on the properties of the substance and temperature. Resistance depends on ρ, L, and A as
R1= ρ •L/A