Question

Below are 3 pieces of cobalt metal . In each, four different magnetic domains are drawn. Each domain is labeled with an arrow indicating the direction of the magnetic field in that domain. Which of these bars of cobalt metal has a magnetic field?

O Bar A
O Bar B
O Bar C

Answer 1

Answer: B

Those two are the only ones with the lines in opposite directions. The lines are also going towards one another so there is a magnetic pull