Which statement correctly describes how a bar magnet should be placed on a globe to correctly align with earth's magnetic field?
a. place the magnet horizontally on the equator, with the south end facing south america.
b. place the magnet vertically on the equator, with the south end facing the the north pole.
c. place the magnet vertically on the equator, with the north end facing the north pole.
d. place the magnet horizontally on the equator, with the north end facing south america.