Gravitational Field vs. Electric Field

• Gravitational Field vs. Electric Field
  

Let us have your opinion about the attraction of an object.

The concept of  was introduced by Michael Faraday. The electrical field force acts between two charges, in the same way that the gravitational field force acts between two masses. We know about of the earth, i.e., the gravity (g = 9.8 m/s2), but where does this number come from? It comes from Newton's . It states that every matter which has a mass attracts other matters with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between the centers of gravity of the two matters. where: or (constant), me = mass of the earth (kg), mo = mass of an object (kg), and d = distance between the earth and the object (m). We already studied about gravitational force of an object on earth, which is F = m*g, where "m" is mass of the object and "g" is the gravity of the earth. Then, we can say that . Therefore, gravity (g) of the earth is , where "me" is the mass of the earth and "d" is its radius (we are talking about gravitational force on the surface of the earth.).

	The (E) is derived in the same way from the equation (see right)where: (constant), Q = electric force of one object (C), q = electric force of the other object (C), and d = distance between the two objects (m). However, electric field E is a little bit different from gravitational field g. Gravitational force depends on mass, whereas electric force does not depend on mass. Instead, electric force depends on charges on both objects. By rearranging the formula, we get: Electric field (E) for Q: Electric field for q:
	Let's divide the electric force (F) by charge q: Therefore, the electric field tells us the force per unit charge.

Section 2. Electric Field Line

	Electric field lines can be drawn using field lines. They are also called force lines.
	(Positive charge electric field)	The field lines are originated from the positive charge.	(Negative charge electric field)	The field lines end up at the negative charge.

A positive charge exerts out and a negative charge exerts in equally to all directions; it is sic. ymetrField lines are drawn to show the direction and strength of field. The closer the lines are, the stronger the force acts on an object. If the lines are further each other, the strength of force acting on a object is weaker.

vitational Field vs. Electric Field