Magnetic Poles
Magnetic Poles - Related Videos
08:57
Introduction to the Power Pole Board
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2023
Source: Ali Bazzi, Department of Electrical Engineering, University of Connecticut, Storrs, CT. DC/DC converters are power electronic converters that convert DC voltages and currents from a certain level to another level. Typically, voltage conversion is the main purpose of DC/DC converters and three main types of conversion exist in a single converter: stepping up, stepping down, and stepping up or down. Among the most common step-up converters are boost converters (Refer to this collections...
01:24
Pole and System Stability
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2024
The transfer function is a fundamental concept representing the ratio of two polynomials. The numerator and denominator encapsulate the system's dynamics. The zeros and poles of this transfer function are critical in determining the system's behavior and stability. Simple poles are unique roots of the denominator polynomial. Each simple pole corresponds to a distinct solution to the system's characteristic equation, typically resulting in exponential decay terms in the system's response.
10:04
Magnetic Fields
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2023
Source: Yong P. Chen, PhD, Department of Physics & Astronomy, College of Science, Purdue University, West Lafayette, IN Magnetic fields can be generated by moving charges, such as an electrical current. The magnetic field generated by a current can be calculated from the Maxwell equation. In addition, magnetic objects such as bar magnets can also generate magnetic fields due to microscopic dynamics of charges inside the material. Magnetic fields will exert magnetic force on other moving...
14:21
Dissection of Organizer and Animal Pole Explants from Xenopus laevis Embryos and Assembly of a Cell Adhesion Assay
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Cited by 2 •
2007
This video demonstrates the technique used for preparation of organizer and animal pole explants from Xenopus laevis embryos, including the use of the eyebrow knife - a specialized dissection tool made of one's eyebrow. The protocol for assembling an adhesion assay is also given, which probes for the presence of key adhesion molecules present on the surface organizer or animal pole cells that are critical for proper development.
07:33
Quantifying Mixing using Magnetic Resonance Imaging
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Cited by 5 •
2012
Magnetic resonance imaging (MRI) provides a powerful tool to evaluate the effectiveness of process equipment during operation. We discuss the use of MRI to visualize mixing in a static mixer. The application is relevant to personal care products, but can be applied to a broad range of food, chemical, biomass and biological fluids.
FAQs
The poles mark regions where the magnet’s organized magnetic moments produce especially strong and clearly directed magnetic-field behavior. This concentration makes the field’s directional pattern most apparent at the north and south ends. Examining these regions helps physicists relate a magnet’s internal organization to its external dipole field and to the forces observed between magnets.
Magnetic poles occur as opposing north and south regions within the dipole pattern of an ordinary magnet. Field lines emerge from the north pole and enter the south pole outside the magnet, rather than beginning or ending at an independently observed magnetic charge. This contrasts with electric-charge behavior and explains why simply dividing a magnet does not establish an isolated pole.
Their attraction and repulsion follow the directional interaction of magnetic fields. Opposing pole types attract, while matching pole types repel, because each pole’s field interacts with the field produced by the other magnet. This principle provides a practical way to identify pole orientation and underlies the directional behavior used in devices that depend on controlled magnetic interactions.
Magnetic poles arise from the organization of magnetic moments within a material. When those moments produce a coordinated magnetic state, the material exhibits the opposing regions and dipole field associated with a magnet. Materials physics studies this relationship to connect microscopic organization with measurable pole strength, field direction, and the larger magnetic behavior of the material.
A compass aligns with Earth’s magnetic field, so its response reveals a preferred field direction rather than merely pointing toward an arbitrary location. The interaction between the compass magnet and Earth’s field produces the alignment used for navigation and measurement. This application connects the behavior of small magnetic poles with geomagnetism, the study of Earth’s magnetic environment.
These applications rely on the interaction between magnetic fields and the directional behavior of poles. Motors and generators use magnetic interactions to support energy conversion, while sensors detect magnetic conditions and imaging systems use magnetic fields to produce information about a subject. Studying pole behavior therefore connects basic physics with engineering systems and scientific measurement.