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Chapter Page 1 Systems of Units and Standards
Movingcoil InstrumentsGeneral Theory
Commercial Movingcoil Instruments
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a.c. circuits a.c. potentiometer accuracy adjustment alternating alternating current ammeter arms arrangement B.Sc bridge bridge circuit calculated calibration capacitance capacitor circuit of Fig components connected in series constant construction control torque core corresponding current coil current transformer damping deflecting torque detector determined diagram dial direct current disc effect electrical electrodynamic electronic expression flux density frequency galvanometer gives hysteresis impedance indication inductor input iron lagging loop loss magnetic manganin measurement ment meter method moving coil moving-coil instruments moving-iron mumetal mutual inductance normally number of turns obtained oscillator oscillograph output parallel phase angle phasor pointer position potential potential divider power factor primary produced proportional quadrature r.m.s. values ratio error reactance reading rectifier resistor resonance rotation scale screen secondary series resistance shown in Fig shunt slide-wire specimen spindle standard suitable supply switch tube unit vane variable variation voltage transformer voltage-coil voltmeter watt-hour meter wattmeter wave-form winding zero