Question

calculating the electric field acting on a proton so that proton remains stationary in space??​

Answer 1

Any nonzero electric field strength will apply a force to a proton according to F=e*E, e being the electric charge quantum and E the electric field strength, thereby changing it’s speed continuously.

To keep the proton stationary, ori at constant velocity, no field should be present at all.

I am assuming here the proton to be a classic particle, ignoring Heisenberg’s uncertainty principle, that states that the speed (or actually, momentum) can not be zero without creating an infinite uncertainty in it’s position.

Any nonzero electric field strength will apply a force to a proton according to F=e*E, e being the electric charge quantum and E the electric field strength, thereby changing it’s speed continuously.

To keep the proton stationary, or at constant velocity, no field should be present at all.

I am assuming here the proton to be a classic particle, ignoring Heisenberg’s uncertainty principle, that states that the speed (or actually, momentum) can not be zero without creating an infinite uncertainty in it’s position.

Answer 2

Any nonzero electric filed strength will apply a force to a proton according to F=e*E,e being the electric charge quantum and E the electric filed strength,thereby chanting its speed continuosly.

To keep the proton stationary,or at constant velocity,no filed should be present at all.