Science of Sun activity
... Keep in mind electricity is just another form of electromagnetic radiation When a current (EMR) moves or flows, it creates a magnetic field Electric current is the source of magnetism. ...
... Keep in mind electricity is just another form of electromagnetic radiation When a current (EMR) moves or flows, it creates a magnetic field Electric current is the source of magnetism. ...
magnetism - Earth and Environmental Sciences
... Immediately upon closing the switch, Faraday noticed a brief flicker of current in the secondary coil, but none thereafter. As the magnetic field was being established in the iron ring (i.e., when the field lines were moving), a current was induced in the secondary coil. However, once the magnetic f ...
... Immediately upon closing the switch, Faraday noticed a brief flicker of current in the secondary coil, but none thereafter. As the magnetic field was being established in the iron ring (i.e., when the field lines were moving), a current was induced in the secondary coil. However, once the magnetic f ...
Electromagnetic Induction Notes
... wrapped and a secondary coil is wrapped • Step up transformer – secondary has more loops than primary so voltage increased in secondary (increases voltage) • Step down transformer – secondary has less loops than primary so voltage decreased in secondary (decreases voltage) ...
... wrapped and a secondary coil is wrapped • Step up transformer – secondary has more loops than primary so voltage increased in secondary (increases voltage) • Step down transformer – secondary has less loops than primary so voltage decreased in secondary (decreases voltage) ...
SUPERCONDUCTING MATERIALS
... magnetic field, and the train is levitated by the repulsive force between these magnetic fields. The magnetic field in the train is produced by either electromagnets or by an array of permanent magnets The repulsive force in the track is created by an induced magnetic field in wires or other conduct ...
... magnetic field, and the train is levitated by the repulsive force between these magnetic fields. The magnetic field in the train is produced by either electromagnets or by an array of permanent magnets The repulsive force in the track is created by an induced magnetic field in wires or other conduct ...
Magnetic Modelling – basic concepts
... The earth is surrounded by a magnetic field, which is believed to be generated by electrical currents in the liquid part of the earth’s core (Fowler, 1994). The shape of the earth magnetic field is very close to that of a bar magnet and the magnetic field lines are vertical close to the magnetic pol ...
... The earth is surrounded by a magnetic field, which is believed to be generated by electrical currents in the liquid part of the earth’s core (Fowler, 1994). The shape of the earth magnetic field is very close to that of a bar magnet and the magnetic field lines are vertical close to the magnetic pol ...
Producing Electric Current
... When the coil is fixed and the magnet rotates, the current is the same as if the coil rotates and the magnet is fixed. Construction of a generator in a power plant Electromagnets contain coils of wire wrapped around ...
... When the coil is fixed and the magnet rotates, the current is the same as if the coil rotates and the magnet is fixed. Construction of a generator in a power plant Electromagnets contain coils of wire wrapped around ...
Poster
... Magnetic resonance imaging (MRI) is based on the principle of Nuclear Magnetic Resonance (NMR), first discovered in 1938. This has been developed into a clinical and research tool that has been used on humans since the 1980s. The MRI technique has advantages over other imaging modes in its lack of i ...
... Magnetic resonance imaging (MRI) is based on the principle of Nuclear Magnetic Resonance (NMR), first discovered in 1938. This has been developed into a clinical and research tool that has been used on humans since the 1980s. The MRI technique has advantages over other imaging modes in its lack of i ...
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.