11.3 Exercise 13

An alpha-particle $\left(\right. m = 6.64 \times 10^{−27} \text{kg},$ $q = 3.2 \times 10^{−19} \text{C} \left.\right)$ travels in a circular path of radius 25 cm in a uniform magnetic field of magnitude 1.5 T. (a) What is the speed of the particle? (b) What is the kinetic energy in electron-volts? (c) Through what potential difference must the particle be accelerated in order to give it this kinetic energy?