1.

When 5V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is \[2.5\times {{10}^{-4}}m{{s}^{-1}}\] If the electron density in the wire is \[8\times {{10}^{28}}{{m}^{-3}}s\], the resistivity of the material is close to

A. \[1.6\times {{10}^{-8}}\Omega \,m\]
B. \[1.6\times {{10}^{-7}}\Omega \,m\]
C. \[1.6\times {{10}^{-6}}\Omega \,m\]
D. \[1.6\times {{10}^{-5}}\Omega \,m\]
Answer» E.


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