We may define electrostatic potential at a point in an electrostatic field as the amount of work done in moving a unit positive test charge from infinity to that point against the electrostatic forces, along any path. Due to a single charge `q` , potential at a point distant `r` from the charge is `V = (q)/(4pi in_(0)r)`. The potential can be positive or negative. However, it is scalar quantity. The total amount of work done in bringing various charges to their respective postions from infinelty large mutual separations gives us the electric potential energy of the system of charges. Whereas electric potentail is measured in volt, electric potential energy is measured in joule. You are given a square of each side 1.0 metre with four charges `+1xx10^(-8) C, -2xx10^(-8)C, +3xx10^(-8)C` and `+2xx10^(-8) C` placed at the four corners of the square. With the help of the passage given above, choose the most approprite alternative for each of the following questions : Electric potentail and electric potential energyA. both are scalarsB. both are vectorsC. electric potential is scalar and electric potential energy is vector,D. electric potentail is vector and electric potential energy is scalar.