Abstract
MEASUREMENT of magnetic field strength due to current in a coil is usually made by changing the current and observing the voltage induced in a search coil or in the coil itself. This voltage is proportional to the rate at which the magnetic flux varies and it fluctuates in magnitude and direction, if the field pulsates or alternates. For rapid flux alternations a galvanometer will show no deflexion, but a steady reading can be obtained if the galvanometer connexions are reversed as the induced current reverses. The deflexion is then a measure of the magnetic field under observation. A practical application of this method is the measurement of voltage induced in a relay by the operation of a neighbouring relay.
Article PDF
Rights and permissions
About this article
Cite this article
MAGNETIC FLUXMETER. Nature 150, 355–356 (1942). https://doi.org/10.1038/150355b0
Issue Date:
DOI: https://doi.org/10.1038/150355b0