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Measurement of d c and a c current
Digital voltmeters and digital
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A-weighted accuracy acoustic ampliﬁer analysis angle applied average balance condition beam beta beta particles calibration capacitance capacitor cell cent condenser microphone counting rate crystal deﬁned density detection detector effect electrical electrons elements emission emitted energy equivalent circuit error factor ﬁeld ﬁlm ﬁlters ﬁxed ﬂaw ﬂow ﬂuctuations ﬂuorescent ﬂux frequency gamma rays gauge Geiger counters given impedance inductance inductor input instrument ionization chamber lamp liquid magnetic material measurement method Nal Tl neutrons noise non-destructive testing operation optical oscillator particles phase photomultiplier probe produced proportional counter pulse radiation radioactive source range reﬂected refractive refractive index resistance resistors response sample scintillation counter scintillator semiconductor sensitivity shown in Figure signal sound pressure sound-level meters speciﬁc spectral standard suitable surface technique temperature thermal thickness torque transducer tube typical ultrasonic voltage voltage coil voltmeter wattmeter wave waveform wavelength X-rays