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Use a magnetic recording tape bulk demagnetizer if you don't have in you
lab a high
inductance coil air core coil, e.g. the coil for a Busch apparatus. (a
ferromagnetic
core will ensure demagnetization). Use a Variac if it doesn't have enuff L to
prevent overheating. Put a ball next to the core (or the open end of the
coil) with
max. safe current. remove slowly, then shut off pwr.
bc who had to demagnetize a shadow mask this way.
David Abineri wrote:
> The steel spheres in the Newton's Cradle I have are now magnetized be
> being too close to a powerful magnet. While this produces some
> interesting variations of the cradle's normal operation, I would prefer
> non magnetic spheres.
>
> Is there a convenient way to demagnetize a sphere?
>
> Thanks, David Abineri
>
> --
> David Abineri
> dabineri@choice.net
>
> This posting is the position of the writer, not that of SUNY-BSC, NAU
or the AAPT.
This posting is the position of the writer, not that of SUNY-BSC, NAU or
the AAPT.