Question

7)

a)How can a charged test particle be used to determine the electric field at a point P caused by a charged source object located nearby?

b)what is the distinction between the electric potential difference in an electric field and the electric potential at any point in the field?

Answer 1

1)The electric field is a vector field which consists of a distribution of vectors, The electric field can be defined at some point near the charged object by placing a positive point test charge q0 at that point and calculating the ratio of the vector force F acting on the test charge to the magnitude of this charge:

2)When a Coulomb of charge (or any given amount of charge) possesses a relatively large quantity of potential energy at a given location, then that location is said to be a location of high electric potential. And similarly, if a Coulomb of charge (or any given amount of charge) possesses a relatively small quantity of potential energy at a given location, then that location is said to be a location of low electric potential.