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 $8 \times {10^{28}}\,\,{m^{ - 3}},$ the resistivity of the material is close to :
$1.6 \times {10^{ - 6}}\Omega m$
$1.6 \times {10^{ - 5}}\Omega m$
$1.6 \times {10^{ - 8}}\Omega m$
$1.6 \times {10^{ - 7}}\Omega m$
Solution
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