Question

I am having trouble finding the potential difference between stuff.I mean can somebody help me visualise how you define potential at a point to be 0 and stuff

Answer 1

potential is always calculated relative to a certain reference.

Answer 2

So potential is said bringing something from infinity to that point only if potential is 0 at infinity?

Answer 3

In both cases infinity is regarded as our zero potential ... since it would work for both cases.
In one case the potential is negative while on the other potential is positive,