Ultraviolet radiations of \[6.2\,eV\] falls on an aluminium surface (work function \[4.2\ eV\]). The kinetic energy in joules of the fastest electron emitted is approximately [MNR 1987; MP PET 1990; CBSE PMT 1993; Pb. PMT 2001; BVP 2003; Pb. PET 2004]

• A.            \[3.2\times {{10}^{-21}}\]      
• B.            \[3.2\times {{10}^{-19}}\]
• C.            \[3.2\times {{10}^{-17}}\]      
• D.            \[3.2\times {{10}^{-15}}\]