Two conductors have the same resistance at $0^{\circ }C$ but their temperature coefficients of resistance are \displaystyle\alpha_{}

and alpha_

\displaystyle.{T}{h}{e}{r}{e}{s}{p}{e}{c}{t}{i}{v}{e}{t}{e}{m}{p}{e}{r}{a}{t}{u}{r}{e}{c}{o}{e}{f}{f}{i}{c}{i}{e}{n}{t}{s}{o}{f}{t}{h}{e}{i}{r}{s}{e}{r}{i}{e}{s}{\quad\text{and}\quad}{p}{a}{r}{a}{l}\le{l}{c}{o}{m}{b}\in{a}{t}{i}{o}{n}{s}{a}{r}{e}\ne{a}{r}{l}{y}