A chunk of iron is not usually magnetic, because A. the B fields of the atoms all line up B. the B fields of the atoms are randomly oriented, and cancel out C. its atoms do not have a B field D. electrons cannot move in its atoms

Describe how the magnetic domains in an unmagnetized iron rod will respond to the presence of a strong external magnetic field.  a. The domains will split into monopoles. b. The domains will tend to align with the external field. c. The domains will tend to orient themselves perpendicular to the external field.  d. The domains will tend to align so as to cancel out the external field.

A charge particle is undergoing uniform circular motion due to a constant magnetic field. Which of the following will increase the radius of the particle's circular path? A. decreasing its mass B. increasing its charge C. decreasing the magnitude of the ratio of its mass to charge D. increasing the magnitude of the ratio of magnetic field strength to speed E. decreasing the magnetic field strength.

What happens when you break a bar magnet in two? a.You get two separate poles. One piece will be the north pole, the other will be the south pole. b.You get two bar magnets. Each has a north and south pole. c. The poles discharge. The act of breaking the magnet allows the magnetic charge to move so as to cancel each other out the same way protons can cancel electrons with electric charge. d. You cannot have a magnet without two poles, so the pieces will no longer be magnetic.