When 5 V potential difference is applied across a wire of length 0.1 m,

Question:

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

  1.  $1.6 \times 10^{-6} \Omega \mathrm{m}$

  2. $1.6 \times 10^{-5} \Omega m$

  3.  $1.6 \times 10^{-8} \Omega \mathrm{m}$

  4. $1.6 \times 10^{-7} \Omega \mathrm{m}$


Correct Option: , 2

Solution:

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