l. A proton of speed 2. 0 X 105m/s enters a region of uniform magnetic eld, E = 1. 2 i T. (a) What is the magnitude of the minimum possible magnetic force on the proton, and what are the possible physical conguration(s) for this situation? (b) What is the magnitude of the maximum possible magnetic force on the proton, and what are the possible physical conguration(s) for this situation? (c) How would your answers to (a) and (b) differ if the particle were an electron? 2. A doublycharged sodium ion (N a\") has velocity 1; = 1. 2 i 2. 5 kAkm/s when it enters a region where the magnetic eld is E = 2. 0 j + 3. 0 IEmT. What is (a) the force on and (b) the magnitude of the acceleration of the sodium ion? 3. An experiment is devised so that particles start at rest, travel through a region of potential difference AV, then enter a region of uniform magnetic field g. The eld is perpendicular to the initial velocity of the particle. (a) Describe the path of the particle once it enters the magnetic eld. (b) Three different particles are sent through this experiment: a proton (mass mp and charge +e), a deuteron (mass 2mm charge +3), and an alpha particle (mass 4mm charge +26). Find the radii of the paths of the deuteron and the alpha particle in terms of the proton's cyclotron radius rp