(under subclass 200) Subject matter wherein the apparatus to sense and indicate the sensing of a magnetic field includes apparatus to measure the loss of energy of a cyclically varying magnetic field resulting from it passage through a magnetic material or through a material in which eddy currents are induced by the varying magnetic field.
SEE OR SEARCH THIS CLASS, SUBCLASS:
57, for mutual inductance tests to determine inductance which cause eddy currents.
113, for recording the result of an electrical measurement.
121, for a cathode-ray tube indication of an electrical measurement.
142, for the measurement of electrical real power.
451, for power loss testing of magnetic material by causing heat by passing cyclic current through the material and measuring the power which causes the heat.
