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SOME METALLURGICAL FACTS AND THEIR RELATIONSHIP TO THE MAGNETIC
DETERMINATION OF THE MAGNETISATION CURVE AND THE HYSTERESIS
THE BURROWS DOUBLE
aa contacts alloy amperes atom carbide carbon cast iron Chapter chromium cobalt coefficient coercive force compensating coils condenser constant cooling corresponding current rings cycle deflection demagnetisation diameter direction discharge eddy current effect Electrical electro-magnetic energy ergs per c.c. exciting coil ferromagnetic flux density fluxmeter force H frequency galvanometer throw gauss H curve heat hysteresis loop increase induced e.m.f. induction density intensity of magnetisation length lines per sq magnet steel magnetic circuit magnetic field magnetic flux magnetic induction magnetisation curve magnetising coil magnetising current magnetising force magnetising solenoid magnetometer needle magnitude manganese means measured molecules netising nickel non-magnetic number of turns obtained paramagnetic permalloy permanent magnet permeability pole pure iron remanence resistance reversing switch rope saturation search coil self-demagnetising force shown in Fig solenoid winding specimen straight line switches Sws temperature tungsten values of H volts wattmeter whilst wire yoke zero