Chapter 28
Magnetic Forces and Fields
![Magnetism](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13764.jpg)
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets…
![Magnetic Fields](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13765.jpg)
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force…
![Magnetic Flux](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/14092.jpg)
The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb).…
![Motion Of A Charged Particle In A Magnetic Field](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13767.jpg)
A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move…
![Magnetic Force On A Current-Carrying Conductor](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13768.jpg)
Moving charges experience a force in a magnetic field. Since the magnetic fields produced by moving charges are proportional to the current, a…
![Magnetic Force On Current-Carrying Wires: Example](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13769.jpg)
In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force…
![Torque On A Current Loop In A Magnetic Field](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13771.jpg)
The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed…
![The Hall Effect](https://jovecdn2.ccindex.cn/files/media/science-education/science-education-thumbs/13772.jpg)
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting…
![Enhancement of the Initial Growth Rate of Agricultural Plants by Using Static Magnetic Fields](https://jovecdn2.ccindex.cn/files/thumbs/53967_t.png)
Electronic devices and high-voltage wires induce magnetic fields. A magnetic field of 1,300-2,500 Gauss (0.2 Tesla) was applied to Petri dishes…
![A Paired Bead and Magnet Array for Molding Microwells with Variable Concave Geometries](https://jovecdn2.ccindex.cn/files/thumbs/55548_t.png)
A spheroid culture is a useful tool for understanding cellular behavior in that it provides an in vivo-like three-dimensional environment. Various…