Mechanical Measurements by Electrical Methods |
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accuracy adjustment air-gap alternating current amplifier application armature arms balance bridge circuit calibration capacitance capacitor change in resistance coil connected constant construction convenient coupled current flowing cycles per second deflection described designed detecting detector device diaphragm direct current effect electric circuit electric gaging electromotive force Electronic employed Engineering error exciting current filament frequency gaging circuits gaging element gaging systems galvanometer heat impedance increase indicating instrument inductance-ratio induction balance installed instru magnetic circuit magnitude material measuring mechanical ment metallic method movement moving mutual inductance ohmic resistance operation ordinarily oscillator oscillograph output phase photoelectric pick-up piezoelectric plate possible potential potentiometer pressure primary element produced R-C coupled R₁ R₂ ratio reactance rectifying resistance element resistor resonant Scientific Instruments sensitivity shown in Fig shunt slide-wire specimen strain gage temperature tion tube unbalance variable-inductance variable-resistance vibration voltage wave-form Wheatstone bridge wire