Experiment: Testing A Variety of Objects for Magnetic Attraction
... Force between magnetic poles decreases as their separation increases. ...
... Force between magnetic poles decreases as their separation increases. ...
PHYS 242 BLOCK 5 NOTES Sections 27.1 to 27.7, 27.9 Consider a
... performing a vector integral of dF = I d l × B as in Example 27.8. A current loop forms a magnetic dipole. In a uniform external magnetic field, the net force on a magnetic dipole is zero, but there is a net torque. From Fig. 27.31a), F = IaB sin 90˚ = IaB. The magnitude of the torque on one tu ...
... performing a vector integral of dF = I d l × B as in Example 27.8. A current loop forms a magnetic dipole. In a uniform external magnetic field, the net force on a magnetic dipole is zero, but there is a net torque. From Fig. 27.31a), F = IaB sin 90˚ = IaB. The magnitude of the torque on one tu ...
Electric Motors
... Magnets are named for a region in Asia Minor known as Magnesia where people noticed that some rocks were attracted to one another. One of the earlier uses of magnets was in China in the early 11th century in compasses – the needle was made from magnesia, which acted as a magnet that automatically or ...
... Magnets are named for a region in Asia Minor known as Magnesia where people noticed that some rocks were attracted to one another. One of the earlier uses of magnets was in China in the early 11th century in compasses – the needle was made from magnesia, which acted as a magnet that automatically or ...
Activity: Magnets and Magnetic Fields
... How does the magnetic “behavior” of the materials compare to their electrical properties? Is the comparison simple (i.e. always the same rule)? ...
... How does the magnetic “behavior” of the materials compare to their electrical properties? Is the comparison simple (i.e. always the same rule)? ...
10.1 Permanent Magnets
... Faraday often read the books he bound. From these books, he became interested in science and began to repeat the experiments that he read about. He was particularly interested in electricity and chemistry. At age 21, he decided to pursue further education in science. At the age of 30, Faraday made h ...
... Faraday often read the books he bound. From these books, he became interested in science and began to repeat the experiments that he read about. He was particularly interested in electricity and chemistry. At age 21, he decided to pursue further education in science. At the age of 30, Faraday made h ...
equations
... q potential due to a point charge q with V = 0 at 4 o r Electric dipole (-q +q) V ...
... q potential due to a point charge q with V = 0 at 4 o r Electric dipole (-q +q) V ...
Teacher`s Notes - Electricity and Magnetism, Part 2 Electricity and
... 2. The discussion of magnetic poles starts with recognizing that each magnet has a north and a south pole. No matter how small the magnet is, it will have both poles. Students may be familiar with the idea of a compass which uses magnetism to tell directions. This is because our Earth is really a ve ...
... 2. The discussion of magnetic poles starts with recognizing that each magnet has a north and a south pole. No matter how small the magnet is, it will have both poles. Students may be familiar with the idea of a compass which uses magnetism to tell directions. This is because our Earth is really a ve ...
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.