(a) A charge particle travelling along positive x direction with speed `V_(x)` enters a region of width having a uniform electric field E in positive y direction. A screen is kept, at a distance `D (gtgtl)` from the region of the field, in yz plane. Find the y co-ordinate of the point where the particle strikes the screen. Charge and mass of the par- ticle is + q and m respectively.
(b) The electric field in the region is replaced with a uniform magnetic field B in negative z direction. Now calculate the y co-ordinate of the point on the screen where the particle hits it. Assume deflection due to field to be small and `Dgtgtl.`
(c) Now the field region is filled with a uniform electric (E) and magnetic field (B) both directed in positive y direction. A beam of protons and some other positive ion enters the region trav- elling along x direction. The particles hit the screen along two curved paths. Explain. Draw the two curves in yz plane and point out which one represents the protons.
