Good rate if it is correct.

N N After passing this course and learning about the fact that magnetic shielding material exists capable of repelling magnetic field lines, a man approaches you offering to sell you the patent for a "wonderful, funderful machine". The idea is, merely, this. A bar magnet is tied to an axle that is free to rotate on its own axis. Magnetic shielding material is placed around that bar magnet such that it is largely insulated from the exterior B-Field, with the exception of two small gaps allowing each pole to "see" outside quite well in one particular direction. The axle is then surrounded by a complete loop of very tall bar magnets, held in place, such that the north poles of these magnets resemble a continuous ring around the assembly and the south poles are exceeding distant. What should happen next is that the south pole of the magnet tied to the axel should, via the opening not insulated by magnetic shielding material, be attracted to the continuous ring of north poles on the exterior. Likewise, the north pole of the magnet is question should be repelled by it. The net result of these two off-axis force components should be to generate a torque, spinning the axle around. Given the continuous rotational symmetry of the situation this should continue eternally, creating a perpetual motion machine and an infinite free well of energy for the entire world. Use the tools of magnetic field analysis you have learned to dispel this notion. Hint: The nuances of magnetic shielding material are not the relevant point of duplicity in this scenario. There is, in fact, something more fundamentally incorrect about the analysis of how this device would function as presented above. N N After passing this course and learning about the fact that magnetic shielding material exists capable of repelling magnetic field lines, a man approaches you offering to sell you the patent for a "wonderful, funderful machine". The idea is, merely, this. A bar magnet is tied to an axle that is free to rotate on its own axis. Magnetic shielding material is placed around that bar magnet such that it is largely insulated from the exterior B-Field, with the exception of two small gaps allowing each pole to "see" outside quite well in one particular direction. The axle is then surrounded by a complete loop of very tall bar magnets, held in place, such that the north poles of these magnets resemble a continuous ring around the assembly and the south poles are exceeding distant. What should happen next is that the south pole of the magnet tied to the axel should, via the opening not insulated by magnetic shielding material, be attracted to the continuous ring of north poles on the exterior. Likewise, the north pole of the magnet is question should be repelled by it. The net result of these two off-axis force components should be to generate a torque, spinning the axle around. Given the continuous rotational symmetry of the situation this should continue eternally, creating a perpetual motion machine and an infinite free well of energy for the entire world. Use the tools of magnetic field analysis you have learned to dispel this notion. Hint: The nuances of magnetic shielding material are not the relevant point of duplicity in this scenario. There is, in fact, something more fundamentally incorrect about the analysis of how this device would function as presented above