The mean free path of conduction electrons in copper is about `4.0xx10 – InterviewSolution

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1.	The mean free path of conduction electrons in copper is about `4.0xx10^(-8) m`. The electric field which can give on the average `2.4 eV` energy to conduction electron in copper block is `axx10^(7) V m^(-1)`. What is the integer value of a?
Answer» Here, mean free path, `x=400xx10^(-8)m`. Energy acquired by electron before it collides with a copper ioN/Atom, `W=2.4 eV =2.4xx1.6xx10^(-19)J`. If E is the electric field applied, then force on electron due to electric field, `F=eE`. Workdone by electric field on electron, before it collides with a copper ioN/Atom is W= force xx mean free path`=eEx`

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