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robhlee
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Is there a strength and/or field density difference between ring and disk magnets? I want to know which would create stronger eddy currents when dropped through a copper tube (which one would fall slower).
A current carrying ring does not behave the same as a disk magnet in all curcumstances. For example, if the current carrying ring is rotating then the ring will remain uncharged. However when a disk magnetc is rotating then the disk will have a non-zero charge distribution, although the net charge will remain the same. See proof I wrote and paced on my website at - http://www.geocities.com/physics_world/em/rotating_magnet.htmrobhlee said:what i am asking about is are there field line dynamics that can affect the effective induction.
A ring magnet is a circular magnet with a hole in the center, while a disk magnet is a circular magnet without a hole. The shape and size of the magnet affect its magnetic field and strength.
The strength of a magnet depends on various factors such as its size, shape, and material. Both ring and disk magnets can have different levels of strength depending on these factors, so one type cannot be universally considered stronger than the other.
Ring magnets are often used in motors, generators, and loudspeakers due to their strong magnetic field. Disk magnets are commonly used in magnetic recording devices, sensors, and magnetic clasps.
While both ring and disk magnets have similar properties, they are designed for different purposes and cannot be used interchangeably. The presence or absence of a hole in the center affects their magnetic field and uses.
The choice between using a ring magnet or a disk magnet depends on the specific application. Ring magnets have a stronger magnetic field, but disk magnets have a more uniform field. Ring magnets also have a larger surface area for contact, but disk magnets are more compact. Ultimately, the advantages and disadvantages will vary based on the intended use.