Fundamentals of Electrical Measurements |
Contents
Chapter | 9 |
Movingcoil InstrumentsGeneral Theory | 43 |
Commercial Movingcoil Instruments | 67 |
Copyright | |
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a.c. circuits a.c. potentiometer a.c. source accuracy adjustment alternating alternating current ammeter arms arrangement B.Sc bridge bridge circuit C₁ C₂ calculated calibration capacitance capacitor cathode-ray tube circuit of Fig components constant construction control torque core corresponding current coil current transformer damping deflecting torque determined diagram dial direct current disc effect electrical electrodynamic electron electrostatic flux density frequency galvanometer give hysteresis i₁ impedance indication inductor input lagging load loss M₁ magnetic manganin measurement ment meter method milliammeter moving coil moving-coil instruments moving-iron mumetal mutual inductance normally number of turns obtained oscillation oscillograph parallel phase angle pointer position potential divider power factor primary produced proportional quadrature r.m.s. values R₁ R₂ reactance reading rectifier resistor rotation scale screen secondary series resistance shown in Fig shunt slide-wire specimen spindle standard suitable supply V₁ valve-voltmeter vane variable variation vector voltage transformer voltage-coil voltmeter watt-hour meter wattmeter winding zero