Final answer:
The work done by the electric field on a proton moving towards increasing electric potential depends on the charge of the proton and the change in electric potential. It can be positive or negative depending on whether the electric potential increases or decreases as the proton moves.
Step-by-step explanation:
The work done by the electric field when a proton is moved towards the direction of increasing electric potential depends on the charge of the proton and the change in electric potential. The work done is given by the equation W = qΔV, where W is the work done, q is the charge of the proton, and ΔV is the change in electric potential.
If the electric potential increases as the proton moves, then ΔV is positive and the work done by the electric field is positive. This means that the electric field is doing positive work on the proton. Conversely, if the electric potential decreases as the proton moves, then ΔV is negative and the work done by the electric field is negative. This means that the electric field is doing negative work on the proton.