Physics
Scientific paper
Sep 1929
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1929natur.124..371t&link_type=abstract
Nature, Volume 124, Issue 3123, pp. 371-372 (1929).
Physics
7
Scientific paper
IN the Journalde Physique et le Radium for April 1928, Prof. N. Minorsky describes observations he has made on the behaviour of a mercury arc in a magnetic field under low gas pressure. Under certain experimental conditions he found that the arc moved in a direction opposite to that which should be expected from the electrodynamical laws governing the movement of a conductor carrying current in a magnetic field, and proposes a space charge theory to explain this phenomenon. His theory is based upon the assumption that by the combined effects of collisions and the magnetic field, the electrons in the arc-stream are made to travel in the electrodynamic sense around the annular space in which his arc is drawn, and will thereby establish a negative space charge on the opposite side of the arc. The action of this space charge on the positive ions of the arc is assumed to cause the arc to move in the direction observed. It will be realised that this theory requires a circular or at least a closed path for the arc to move along.
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