Methods of Electrical Measurement |
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Page 41
... slide - wire the greater the accuracy - but the slide - wire becomes inconveniently long if any great accuracy is required . Accurate forms of the potentiometer overcome this difficulty by making the major portion of the slide - wire in ...
... slide - wire the greater the accuracy - but the slide - wire becomes inconveniently long if any great accuracy is required . Accurate forms of the potentiometer overcome this difficulty by making the major portion of the slide - wire in ...
Page 49
... slide - wire . In the case of the a.c. potentiometer , balance can only be obtained if the test and slide - wire p.d.s balance at every instant . This implies that the two alternating p.d.s must have the same magnitude , frequency ...
... slide - wire . In the case of the a.c. potentiometer , balance can only be obtained if the test and slide - wire p.d.s balance at every instant . This implies that the two alternating p.d.s must have the same magnitude , frequency ...
Page 53
Clifford Thomas Baldwin. in the “ quadrature " slide - wire , the e.m.f. Mol , induced in the secon- dary of M is a suitable exact value , e.g. 0-5 volt . By ... slide - wire is shunted and the resulting circuit THE A.C. POTENTIOMETER 53.
Clifford Thomas Baldwin. in the “ quadrature " slide - wire , the e.m.f. Mol , induced in the secon- dary of M is a suitable exact value , e.g. 0-5 volt . By ... slide - wire is shunted and the resulting circuit THE A.C. POTENTIOMETER 53.
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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