On the best method of demagnetizing iron in magnetic testing
Book details
- Title
- On the best method of demagnetizing iron in magnetic testing
- Publication year listed
- 1908
- Format
- Public domain eBook
- Reading access
- Free online reader; no registration required
- Source record
- View on Archive.org
About this book
On the best method of demagnetizing iron in magnetic testing
Year: 1908
The paper contains a number of curves and tables illustrating the behaviour of previously magnetised iron of various qualities under the action of demagnetising forces applied in various ways from a series of slow reversals up to reversals occurring at a frequency of 900 per sec. The object of the research was to ascertain the best way of demagnetising specimens of iron prior to ballistic measurement. With slow reversals demagnetisation of a previously magnetised specimen is complete if the maximum value of the demagnetising force is greater than a certain "critical demagnetising force." This "critical demagnetising force" is equal to a magnetising force H/sub 1/ which is just above that corresponding to the point of maximum permeability
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