The most general way of calculating the value of the vector electric field at a certain point P is given by the formula E = k times Integral of (dq/r² times unit vector). That means you break the charge distribution into infinitesimal elements dq and vectorially add the contributions of each at that point P. 1. But right now I'm studying calculus and trying to figure out what kind of integral is this? Is it a line integral, an area integral or a volume integral? It doesn't seem to be any of these, since I'm just adding values at a single point. 2. And is it a definite or indefinite integral?