When iron is placed in a magnetic field, the spins of the electrons in the iron have a tendency to do which of the following?
align in the opposite direction of the magnetic field
align perpendicular to the magnetic field
align in the direction of the magnetic field
remain stationary
You have a bar magnet lined up horizontally—that is, its north pole is at the right, and south pole is at the left. You cut the bar magnet in half, along the vertical axis. You end up with what?
two isolated south poles
two isolated north poles
two separate bar magnets, each with a north and south pole
at right, an isolated north pole, and at left an isolated south pole