The mean free path of electrons in a metal is \[4\times {{10}^{-8}}\,m\]. The electric field which can give on an average 2 eV energy to an electron in the metal will be in unit of \[V{{m}^{-1}}\] [AIPMT (S) 2009]

• A. \[8\times {{10}^{7}}\]
• B. \[5\times {{10}^{-11}}\]
• C. \[8\times {{10}^{-11}}\]
• D. \[5\times {{10}^{7}}\]