| l I I I 1 o e e i o o e : I a a 9 i. a I | I I e e e L o | I a l e | n Outof Paper | o o 1 ' l in Both Regions 9 a a d: ' e e I _ V_,.. | - | | mg I a o c Q a e a I I e e e L a a a i I RegionII 1 i Region I 1' An ion of mass m and charge of known magnitude q is observed to move in a straight line through a region of space in which a uniform magnetic eld B points out of the paper and a uniform electric eld E points toward the top edge of the paper, as shown in region I above The particle travels into region II in which the same magnetic eld is present, but the electric eld is zero. In region 11 the ion moves in a circular path as shown (a) Indicate on the diagram below the direction of the force on the ion at point P2 in region II. Reg ion I Region II (b) Is the ion positively or negatively charged? Explain clearly the reasoning on which you base your conclusion. (e) Indicate and label clearly on the diagram below the forces which act on the ion at point P] in region I. Region I I Region II (d) Find an expression for the ion's speed v at point P1 in terms ofE and US _______.____.___.____