Question

A water molecule in a vacuum is attracted to a region with an E field of 10^6 V/m. What is the kinetic energy of this molecule in this field (expressed in eV)?

Answer 1

$A=qU=qEd,$

$A_q=Ed,$

$d\approx 10^{-9},$

$A_q=10^6\cdot 10^{-9}=10^{-3}~eV.$