So far, we know a few things about electric potential energy. For example, we know the change in electric potential energy is equal to the negative internal work in a system.
The work in the system as a charge q moves between points A and B is
Wᵢₙₜ = -ΔUE = qEd,
where in this case, electric field E and distance d are parallel.
Using the relationship between electric potential difference and electric potential energy difference, we find the electric potential difference is determined by
V=-E→*Δ(r)→
where E is a uniform electric field, and Δr is a displacement between two points in that field.
If the electric field and the displacement are parallel, and the displacement is of length d, the electric potential difference between points A and B is then the following.
ΔV = -Ed
and P₂, where P₁ is 4.50cm to the right of P₂ ?
