Question

A +2 nC charge is placed at a distance r from a –8 mC charge. If the charge experiences a force of 4.2 kN, what is the electric field intensity E at point P?

Answer 1

An electric field E at point P (or any other point) means that _if_ a "test charge" q is brought to that point, that "test charge" q will find a force F that is given by F = E q. Remember, tho', this is true only as a vector equation!