Methods of Electrical Measurement |
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Page 65
... Ballistic - galvanometer Method . The value of a mutual inductance may be determined by a ballistic galvanometer , utilizing a d.c. supply . If a current I , is reversed in the primary of the mutual inductance M , the instantaneous ...
... Ballistic - galvanometer Method . The value of a mutual inductance may be determined by a ballistic galvanometer , utilizing a d.c. supply . If a current I , is reversed in the primary of the mutual inductance M , the instantaneous ...
Page 68
... ballistic galvanometer when the condenser is discharged through it ( see p . 65 ) . These two equations enable C to be obtained provided V and the galvanometer constants are known . V may be obtained by a voltmeter or , preferably , by ...
... ballistic galvanometer when the condenser is discharged through it ( see p . 65 ) . These two equations enable C to be obtained provided V and the galvanometer constants are known . V may be obtained by a voltmeter or , preferably , by ...
Page 136
... ballistic galvanometer , or by operating the permeameter with a speci- men of known magnetic properties in place of the test specimen . The values of B in the specimen are measured by a B - coil in the manner described for ring ...
... ballistic galvanometer , or by operating the permeameter with a speci- men of known magnetic properties in place of the test specimen . The values of B in the specimen are measured by a B - coil in the manner described for ring ...
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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