Shown in the gure below is a device used to detect the presence and sign of charge placed on a small ball. The small and very low mass ball (m = 0.00085 kg) is suspended by a string. When an electric eld (E = 925 Newtons/Coulomb) is applied in the direction shown in the figure, the ball shifts to one side making an angle 9 = 17.4 degrees. Electric Field I I I I I I , I I I I I I I I I I I Determine the sign of the charge on the ball: Negative Positive Neutral J Determine the tension in the string: T = .08729 X Newtons Determine the charge on the ball: Q = 2.822e-5 x Coulombs Dude! Did I or did I not ask you to be careful with signs? Prof H NOTE: Be careful with the sign of the answer in the final part of the