As discussed before, a gravitational field surrounds Earth or any object with mass. Another object with mass that is placed in this field will experience a gravitational force on it. In the same manner, an electric field surrounds a charged object. Another charged object placed in that field will experience a force. If a positive force creates the field then the force caused by the field on a negative force will be toward the source of the field. A positive charge will experience a force away from the source. The English physicist Michael Faraday (1791-1867) was the first to use the concept of a field to describe the electrostatic force.