Electric Field - A Field of Force
An electric field is defined as being present in any region where a charged object experiences an electric force. This is a fancy way of saying that the only way we can tell if a field exists is to place a test charge at that spot and see if it feels a force. (In other words, it takes one to know one.) The animation below shows a stationary charge (Although we have no way of knowing it is charged until we bring in a test charge.) When a test charge is brought in...
