Five particles follow the paths shown in the figure as they pass through a magnetic field B, which is indicated by the dots or crosses in the figure. What can you conclude about the charge of each particle? (If your answers for charges of particles 1, 2, 3, 4, and 5, are, respectively, +, 0, +, -, 0 then enter: 20210 into the computer. 0 =0, - =1, + =2)


http://s1.postimage.org/loqnbxl07/0000000.gif

*** help me do it,
what I thought is 1- 2+ 3- 4+ 5-

01221 I got it :)