Two positive ions of the same mass, one singly charged and the other doubly charged, are a...

Two positive ions of the same mass, one singly charged and the other doubly charged, are accelerated from zero velocity through the same potential, Vacc, after which they travel through a deflection region of lengthL. Calculate the ratio θ2/θ1, where θ2 refers to the doubly and θ1, to the singly charged ion for the following cases: (a) deflection due to a uniform E field as shown; (b) deflection due to a uniform B field as shown; (c) deflection due to both E and B fields as shown. The deflection angles may be assumed small.