Chapter 20, Problem 2MCP

A beam of protons is directed horizontally into the region between two bar magnets, as shown in Figure 20.47. The magnetic field in this region is horizontal. What is the effect of the magnetic field on the protons? (Hint: First refer to Figure 20.6c to find the direction of the magnetic field.)

Figure 20.47

Multiple-Choice Problem 2.

1. A.    The protons are accelerated to the left, toward the S magnetic pole.
2. B.     The protons are accelerated to the right, toward the N magnetic pole.
3. C.     The protons are accelerated upward.
4. D.    The protons are accelerated downward.
5. E.     The protons are not accelerated, since the magnetic field does not change their speed.