Question

A 2a current flows in a conductor which has 1×10^24 free electrons per metre.what is their average drift velocity

Answer 1

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Answer 2

Explanation :

Given that,

Current, I = 2 A

Number of electrons per unit length, $\dfrac{n}{l}=1\times 10^{24}$

We know that the drift velocity is given by :

$v_d=\dfrac{I}{neA}$

$v_d=\dfrac{2\ A}{10^{24}\times 1.6\times 10^{-19}\ C\times 1\ m}$

$v_d=1.25\times 10^{-5}\ m/s$

Hence, this is the required solution.