Are the number of positive charges and negative charges in the universe a constant?
Charge conservation is the principle that electric charge can neither be created nor destroyed. The quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved. The principle was first discovered by Benjamin Franklin. In practice, charge conservation is a physical law that states that the net change in the amount of electric charge in any volume of space is exactly equal to the net amount of charge flowing into the volume minus the amount of charge flowing out of the volume. In essence, charge conservation is an accounting relationship between the amount of charge in a region and the flow of charge into and out of that same region. Mathematically, we can state the law as a continuity equation: Q(t_2)= Q(t_1) + Q_{IN} – Q_{OUT}. Q(t) is the quantity of electric charge in a specific volume at time t, Q_{IN} is the amount of charge flowing into the volume between time t_1 and t_2, and Q_{OUT} is the amount of charge f
