The figure shows two different orientations of a proton in a magnetic field. Which orientation is at higher energy?
A) a
B) b
C) Both are at the same energy, and there is no other orientation at higher energy.
D) Both are at the same energy, but if the spin vector were perpendicular to the magnetic field the energy would be higher.
E) Both are at the same energy, but if the spin vector were perpendicular to the magnetic field the energy would be lower.

Question

The figure shows two different orientations of a proton in a magnetic field. Which orientation is at higher energy? 
A) a 
B) b 
C) Both are at the same energy, and there is no other orientation at higher energy. 
D) Both are at the same energy, but if the spin vector were perpendicular to the magnetic field the energy would be higher. 
E) Both are at the same energy, but if the spin vector were perpendicular to the magnetic field the energy would be lower.

Quizplus · Accepted Answer

The orientation shown in option B is at higher energy because it is aligned opposite to the direction of the magnetic field. In this orientation, the proton's magnetic moment is anti-parallel to the external field, resulting in high energy. Option A, on the other hand, shows the proton aligned parallel to the magnetic field and hence at a lower energy state. Option C and D are incorrect because there is a difference in energy levels based on the orientation of the proton's magnetic moment relative to the external field. Option E is also incorrect as a perpendicular orientation would have a different energy level, but it is not specified whether it would be higher or lower.

The Figure Shows Two Different Orientations of a Proton in a Magnetic