electric and gravitational field

Gravitational Field:

It is the gravitational force per unit test mass m_o  and is represented by g

                                                g = F/m_o                                              

Ø   This field is static, because the source of the field i.e. the mass of the gravitating body is constant

Ø   This field is also uniform meaning that g is same (in direction and in magnitude) for all the points

 This field is independent of the magnitude of test mass m_o (because the small mass m_o will not disturb the distribution of  the mass of gravitating body.
Electric Field:

This field is independent of the magnitude of test mass m_o (because the small mass m_o will not disturb the distribution of  the mass of gravitating body.The space around a source charge where a test charge can experience an electric force is called the electric field. The electric field at a point in the vicinity of source is the electric force F_o experienced by the test charge q_o at that point divided by the charge q_o.  The direction of electric field E is the same as the direction of electric force F_e because q_o is a positive scalar quantity.Units of the electric field in SI units is Newton/Coulomb (N/m) and some time it may also be given as volt/meter V/m