Letter | Published:

Frictional Torque of an Axial Magnetic Suspension

Naturevolume 140pages3031 (1937) | Download Citation

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Abstract

A VERTICAL needle of iron suspended in vacuo by the co-axial field of a solenoid theoretically may have infinitesimal frictional torque against axial rotation. The purpose of the present note is to report an observed value of this frictional torque.

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References

  1. 1

    Holmes, F. T., Phys. Rev., 51, 689 (1937).

  2. 2

    Reported by F. T. Holmes at meeting of the Va. Acad. Sci., May 7, 1937.

  3. 3

    Beams, J. W., Weed, A. J., and Pickels, E. G., Science, 78, 338 (1933).

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Author information

Affiliations

  1. Rouss Physical Laboratory, University of Virginia

    • F. T. HOLMES
    •  & J. W. BEAMS

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DOI

https://doi.org/10.1038/140030b0

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