Give some important and summary about Demagnetization magnets

When a magnetized magnet is exposed to a strong magnetic field that is set up in opposition to the magnet's magnetization, a portion of the magnet may become demagnetized. 

This demagnetization essentially reduces the magnet's effective field, and the magnet's performance suffers as a result.

The field strength required for the demagnetization must be of opposite polarity (reversing) to the magnetization field strength H sat, hence -H c. The demagnetization with reversing field H c only works on a magnetized material sample of simple, symmetrical geometry. Technical parts with irregular geometry and made of materials with different magnetic properties (for example hardened parts) must be demagnetized.

Explanation:

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i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

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