# DV=Ed? When valid?

• I
Hello,

When exactly is ##\Delta V = Ed##? Wouldn't E need to be uniform for this to be true? And if for example we have a sphere and we would like to know the potential from the surface to a certain point, then wouldn't we have to assume that E is uniform everywhere i.e. constant to take it out of the integral?

Dale
Mentor
2021 Award
Wouldn't E need to be uniform for this to be true?
Yes, this is right.

mk9898
Ok thank you.