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THE PERMANENT MAGNET MOVING COIL
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ac bridges accuracy and precision accurate adjustable resistor ammeter ampere analog average balanced Calculate Rr calibration capacitance components construction current going decade box deviation plot digital meter diode electrical equation Example full-scale deflection full-wave germanium given Half-wave hysteresis input impedance linear loading effect loading error loop loop current low resistances main resistor measured values measuring instrument ment meter movement meter resistance meter sensitivity midscale reading midscale resistance multiturn notation null detector number of significant Ohm's law ohms output impedance parallel ohmmeter PMMC meter PMMC movement pointer position potentiometer potentiometric circuits precision problem ranging resistor ratio reactance readability readout rectifier reference accuracy resis rotating scientific notation series ohmmeter shown in Figure shows shunt significant digits span supply voltage switch tance temperature tion true voltage units variable resistor Vave voltage drop voltage measured voltmeter Weston cell wiper