he figure, a charged particle moves into a region of uniform magnetic field B,goes through half a circle, and then exits that ion. The particle is either a proton or an electron (you must decide which). It spends 127 ns in the region. (a) What is the magnitude B ? (b) If the particle is sent back through the magnetic field (along the same initial path) but with 4.89 times its previous kinetic rgy, how much time does it spend in the field during this trip? OB

he figure, a charged particle moves into a region of uniform magnetic field B,goes through half a circle, and then exits that ion. The particle is either a proton or an electron (you must decide which). It spends 127 ns in the region. (a) What is the magnitude B ? (b) If the particle is sent back through the magnetic field (along the same initial path) but with 4.89 times its previous kinetic rgy, how much time does it spend in the field during this trip? OB