Bar Magnets

Animation 1

Animation 2


The above animations represent two typical bar magnets each with a North and South pole. The arrows represent the direction of the magnetic field.  The color of the arrows represents the magnitude of the field with magnitude increasing as the color changes from blue to green to red to black. You may drag either magnet,  double-click anywhere inside the animation to add a magnetic field line, and mouse-down to read the magnitude of the magnetic field at that point.


Which animation correctly depicts properly labeled magnets?  


Instructor Resources

Reference: See Giancoli-PA: 20-1, Giancoli-SE: 27-1.
Answer: Animation 2. This problem is a slightly more difficult extension of Exercise 7.2.3.
Script Author: Mario Belloni