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Apple's MagSafe tech—which allows you to snap an iPhone 12 or later to a slew of accessories, like chargers, holders, and desk setups—has been a great addition on the last few models of iPhone ...
MagSafe is a series of proprietary magnetically attached power connectors developed by Apple Inc. for Mac laptops. MagSafe was introduced on 10 January 2006, in conjunction with the MacBook Pro, the first Intel-based Mac laptop, at the Macworld Expo.
The MagSafe receptacle on iPhones, internally called MagSafe Attach, [6] uses magnets to align automatically and attach to a Qi charger, ensuring reliable charging. [ 7 ] [ 8 ] On October 18, 2021, Apple released the 3rd generation AirPods and an updated SKU of AirPods Pro with a bundled MagSafe charging case.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
MagSafe, a magnetic charging connector, has been replaced with USB-C charging. [155] Unlike MagSafe, which provided an indicator light within the user's field of view to indicate the device's charging status, the USB-C charger has no visual indicator. Instead, the MacBook Pro emits a chime when connected to power. [155]
The neodymium atom can have a large magnetic dipole moment because it has 4 unpaired electrons in its electron structure [14] as opposed to (on average) 3 in iron. In a magnet it is the unpaired electrons, aligned so that their spin is in the same direction, which generate the magnetic field.
Magnetic induction B (also known as magnetic flux density) has the SI unit tesla [T or Wb/m 2]. [1] One tesla is equal to 10 4 gauss. Magnetic field drops off as the inverse cube of the distance ( 1 / distance 3 ) from a dipole source. Energy required to produce laboratory magnetic fields increases with the square of magnetic field. [2]
During the 20th century, the maximum energy product of commercially available magnetic materials rose from around 1 MGOe (e.g. in KS Steel) to over 50 MGOe (in neodymium magnets). [4] Other important permanent magnet properties include the remanence ( B r ) and coercivity ( H c ); these quantities are also determined from the saturation loop ...
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