trra230_234_script_20151002_1
... north poles of two magnets together, they will not want to come together. Instead, they will repel each other. The same thing happens if you try to point two south poles together. If, however, you bring the north pole of one magnet close to the south pole of another, they will attract each other and ...
... north poles of two magnets together, they will not want to come together. Instead, they will repel each other. The same thing happens if you try to point two south poles together. If, however, you bring the north pole of one magnet close to the south pole of another, they will attract each other and ...
Exercise 4
... until the middle of the 19th century, physicists widely believed that EM waves could exist in a vacuum. Further, they did not connect EM waves to light, even though some of them suspected that there would be a connection. The magnetic field of a coil of current-carrying wire Equipment needed: a coil ...
... until the middle of the 19th century, physicists widely believed that EM waves could exist in a vacuum. Further, they did not connect EM waves to light, even though some of them suspected that there would be a connection. The magnetic field of a coil of current-carrying wire Equipment needed: a coil ...
Electromagnetic Induction
... this dangerous? •Emf = Blv = (5.0 x 10-5 T) (70m) (280 m/s) = 1.0volt •Could such a potential difference be used to reduce the aircraft’s need for fuel? ...
... this dangerous? •Emf = Blv = (5.0 x 10-5 T) (70m) (280 m/s) = 1.0volt •Could such a potential difference be used to reduce the aircraft’s need for fuel? ...
polikarpov - 4th International Sakharov Conference on Physics
... Fourth International Sakharov Conference on Physics 18 May, 2009, Moscow ...
... Fourth International Sakharov Conference on Physics 18 May, 2009, Moscow ...
Force between magnets
Magnets exert forces and torques on each other due to the complex rules of electromagnetism. The forces of attraction field of magnets are due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that make up the material. Both of these are modeled quite well as tiny loops of current called magnetic dipoles that produce their own magnetic field and are affected by external magnetic fields. The most elementary force between magnets, therefore, is the magnetic dipole–dipole interaction. If all of the magnetic dipoles that make up two magnets are known then the net force on both magnets can be determined by summing up all these interactions between the dipoles of the first magnet and that of the second.It is always more convenient to model the force between two magnets as being due to forces between magnetic poles having magnetic charges 'smeared' over them. Such a model fails to account for many important properties of magnetism such as the relationship between angular momentum and magnetic dipoles. Further, magnetic charge does not exist. This model works quite well, though, in predicting the forces between simple magnets where good models of how the 'magnetic charge' is distributed is available.