A student builds two identical electromagnets using
the same iron core. In the first, the wire is wound
clockwise; in the second, it is wound counterclockwise.
Both are connected to identical batteries. Which
observation is most likely?
A Both will have the same poles at corresponding
ends.
B Their magnetic strengths will differ, but poles
remain same.
C Their poles will reverse, though strength remains
same.
D Neither will act as a magnet.