The area of cross-section length and density of a piece of a metal of atomic weight `60` are `10^-6 m^2`, `1.0 m` and `5xx10^3 kg//m^3` respectively,every atom contributes one free electron. (Given Avogadro number `=6xx10^23//mol)`. Find the drift velocity of electrons in the metal when the current of `16A` passes through:A. `2mm//s`B. `2 cm//s`C. `20 cm//s`D. none of these

The area of cross-section length and density of a piece of a metal of

1.	The area of cross-section length and density of a piece of a metal of atomic weight `60` are `10^-6 m^2`, `1.0 m` and `5xx10^3 kg//m^3` respectively,every atom contributes one free electron. (Given Avogadro number `=6xx10^23//mol)`. Find the drift velocity of electrons in the metal when the current of `16A` passes through:A. `2mm//s`B. `2 cm//s`C. `20 cm//s`D. none of these
Answer» Correct Answer - A `I="ne"Av_(d)…..(i)` `m=5xx10^(3)xx10^(-6)xx1=5xx10^(-3) kg=5 gm` putting all values is equation `(1)` `16=5xx10^(28)xx1.6xx10^(-19)xx10^(-6)xxV_(d)` `V_(d)=2 mm//s`

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