An electron and a proton are both initially at rest. Then, they are both accelerated across the same voltage. Assuming that the uncertainty in their position is given by their de Broglie wavelength, w

An electron and a proton are both initially at rest. Then, they are both accelerated across the same voltage. Assuming that the uncertainty in their position is given by their de Broglie wavelength, what is the ratio of the uncertainty in their momentum? Both particles are non-relativistic.