Chapter 4: Q19E (page 912)
In an experiment with comic rays, vertical beam of particles that have charges of magnitude 3e and mass 12 times the proton mass enters a uniform horizontal magnetic field of and is bent in a semicircle of diameter 95.0 cm , as in figure (a) find the speed of the particles and the sign of their charge. (b) Is it reasonable to ignore the gravity force on the particles? (c) How does the speed of particles as they enter the field compare to their speed as they exit the field.
Short Answer
(a) The speed of the particles is and the sign of their charge is negative.
(b) Yes, it is reasonable, on the particles gravitational force can be ignore.
(c) The speed of particles is constant.