Magnetic Levitation
Magnetic Levitation - Related Videos
04:10
Detection of Rhesus Factor in Human Blood Samples using Magnetic Levitation
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2025
This video demonstrates the detection of the Rhesus (Rh) factor in blood samples using a magnetic levitation instrument. The magnetic field aligns and levitates beads and blood cells based on density. Treating the samples with anti-Rh antibodies results in intermediate-density bead-cell complexes' formation, allowing for the differentiation of Rh-positive and Rh-negative red blood cells.
07:42
Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics
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Cited by 11 •
2017
We present a magnetic levitation technique coupled with automated imaging and analysis in both a smartphone-compatible device and a device with embedded imaging and processing. This is applied to measure the density distribution of cells with two demonstrated biomedical applications: sickle cell disease diagnosis and separating white and red blood cells.
05:25
Quantification of Cellular Densities and Antigenic Properties using Magnetic Levitation
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Cited by 3 •
2021
This paper describes a magnetic levitation-based method that can specifically detect the presence of antigens, either soluble or membrane-bound, by quantifying changes in the levitation height of capture beads with fixed densities.
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...
08:19
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
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Cited by 2 •
2021
A fast and reliable technique is proposed to control the shape oscillations of a single, trapped acoustic bubble that is based on coalescence technique between two bubbles. The steady-state, symmetry-controlled bubble shape oscillations allow analysis of the fluid flow generated in the vicinity of the bubble interface.
FAQs
Stable magnetic levitation requires positional stability, not merely an upward force. In an electromagnet-based arrangement, a feedback system detects changes in position and adjusts field strength to help maintain the intended location. With superconducting materials, magnetic flux pinning can maintain stability when suitable conditions are present, linking levitation behavior to material properties.
Different magnetic sources provide different control characteristics. Permanent magnets create a fixed magnetic field, whereas electromagnets can vary field strength. Superconductors add flux pinning, which can help maintain a stable arrangement under suitable conditions. Comparing these approaches helps explain why a system may prioritize simplicity, active adjustment, or material-dependent stability.
The outcome depends on the relationship between magnetic forces, gravity, field strength, and object position. A field must provide enough support for the object's weight, while changes in position may require the field to respond. In systems using electromagnets, feedback can compensate for such changes; superconducting systems depend on suitable conditions for flux pinning.
A basic demonstration selects a magnetic source, places the object within the intended field region, and establishes conditions in which magnetic forces support its weight. The observer then examines whether the position remains stable. If electromagnets are used, a feedback system can adjust field strength during the demonstration to maintain the levitated position.
Magnetic levitation supports low-friction bearings, contactless transport, and high-speed maglev trains. Avoiding direct physical contact can reduce friction-related effects and allow motion or support without conventional contact between surfaces. These applications show how controlling magnetic fields can translate a physics principle into precision engineering systems and transportation technologies.
Magnetic levitation connects several areas of physics and materials science, including magnetic field behavior, force balance, stability, energy transfer, and the properties of superconducting materials. Experiments and applications provide ways to examine how fields support objects and how control systems or material conditions influence outcomes, making the topic useful for both demonstrations and precision engineering.