[مريم الكويتي]

F=kq1q2/r2 alqowa etha naga9na menha -q- ta36eenah elsheda elmajal E=kq/r2 we etha naga9na mn elsheda E - 1R ta36eenah farg eljohd V =kq/r sheraykoom ashal 6aregah le7efz el gawaneeen