Methods of Electrical Measurement |
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Page 127
Clifford Thomas Baldwin. ing force H may be uniform round the ring . If the ... magnetizing windings L , Q may be connected to the d.c. supply by the switch ... force required for the specimen . The current is then reversed by S1 , thus ...
Clifford Thomas Baldwin. ing force H may be uniform round the ring . If the ... magnetizing windings L , Q may be connected to the d.c. supply by the switch ... force required for the specimen . The current is then reversed by S1 , thus ...
Page 134
... magnetizing winding A is entirely used in driving flux from P to Q in the ... force in use ( which is numeri- cally equal to the flux density in the air ... magnetizing current is reversed , or when one end of the potentiometer is moved ...
... magnetizing winding A is entirely used in driving flux from P to Q in the ... force in use ( which is numeri- cally equal to the flux density in the air ... magnetizing current is reversed , or when one end of the potentiometer is moved ...
Page 136
... magnetizing force H. Values of H for the coil are not calculated from the dimensions of the coil , which are difficult to measure with sufficient accuracy , but are obtained from a previous calibration of the coil . This calibration may ...
... magnetizing force H. Values of H for the coil are not calculated from the dimensions of the coil , which are difficult to measure with sufficient accuracy , but are obtained from a previous calibration of the coil . This calibration may ...
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Common terms and phrases
a.c. potentiometer a.c. Supply accuracy accurate adjusted alternating alternating current ammeter amperes anode arrangement B.Sc.II balance condition ballistic galvanometer beam bridge circuit bridge methods C₁ C₂ calculated calibrated capacitance cathode-ray tube charge circuit of fig components connected in series constant deflection detector determined dielectric dimensions direct current e.s. units effect electron electrostatic equal flux density frequency give Hence hysteresis I₁ impedance induced e.m.f. insulation L₁ l₂ large number loop M.K.S. unit magnetizing force measurement meter mutual inductance non-inductive resistance number of turns obtained ohms parallel phase angle plates possible potential difference potentiometer power factor primary standard R₁ R₂ reactance reading resonance reversed S₁ screen search coil self-inductance sensitivity shown in fig shunt slide-wire solenoid specimen suitable switch tance terminals Thévenin's theorem unknown p.d. usually V₁ V₂ valve voltmeter variable voltage voltmeter volts wattmeter Wheatstone bridge wire Y-plates zero