Physics - Practical physics Question with Solution | TestHub

A standard cell of$1.08\mathrm{ }\mathrm{V}$is balanced by the potential difference across$90\mathrm{ }\mathrm{c}\mathrm{m}$of a$1$meter, long wire supplied by a cell of emf$2\mathrm{V}$through a series resistor of resistance$2\mathrm{ }\mathrm{\Omega }$. If the internal resistance of cell in the primary circuit is zero then the resistance per unit length (in$\mathrm{\Omega } {\mathrm{m}}^{-1}$) of potentiometer wire is