11.7 Exercise 49

Unreasonable results A charged particle having mass $6.64 \times 10^{−27} \text{kg}$ (that of a helium atom) moving at $8.70 \times 10^{5} \text{m}/\text{s}$ perpendicular to a 1.50-T magnetic field travels in a circular path of radius 16.0 mm. (a) What is the charge of the particle? (b) What is unreasonable about this result? (c) Which assumptions are responsible?