An electron is accelerated from rest through a potential difference of 200 V. The de Broglie wavelength associated with this electron is _____ nm. (Rounded off to 2 decimal places) (Planckβs constant = $6.6 Γ 10^{-34} J s, 1eV=1.6 Γ 10^{-19} J$, mass of an electron = $9.1Γ10^{-31} kg$)