Chapter 28, Problem 064 GO The figure gives the potential energy U of a magnetic dipole...
Chapter 28, Problem 064 GO The figure gives the potential energy U of a magnetic dipole in an external magnetic field , as a function of angle φ between the directions of B and the dipole moment. The vertical axis scale is set by Us 2.1 x 10-4 J. The dipole can be rotated about an axle with negligible friction so as to change φ. Counterclockwise rotation from φ = 0 yields positive values of φ, and clockwise rotations yield negative values. The dipole is to be released at angle φ = 0 with a rotational kinetic energy of 6.8 × 10-4 J, so that it rotates counterclockwise. To what maximum value of φ will it rotate? U(10-4J) 180 -180 Number Units