Advanced Electrical Measurements |
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Page 15
... resistance measurements , portable and variable standards of resistance , built up of wire - wound coils and ... standard resistance of the same order of magnitude , impelled by the same electromotive force , are compared , and the ...
... resistance measurements , portable and variable standards of resistance , built up of wire - wound coils and ... standard resistance of the same order of magnitude , impelled by the same electromotive force , are compared , and the ...
Page 24
... standard , S1 is any resistance , not necessarily accurately known , but near enough to the value of S to give a balance near the center of the slide wire , and C is a third resistance , fairly ac- curately known , of about 100 times ...
... standard , S1 is any resistance , not necessarily accurately known , but near enough to the value of S to give a balance near the center of the slide wire , and C is a third resistance , fairly ac- curately known , of about 100 times ...
Page 27
... standard resistance . Con- sider the circuit of Fig . 10 . The voltmeter is first connec- ted directly across the line , reading Vo , then in series R V FIG . 10. Resistance measurement by the voltmeter method . with the resistance ...
... standard resistance . Con- sider the circuit of Fig . 10 . The voltmeter is first connec- ted directly across the line , reading Vo , then in series R V FIG . 10. Resistance measurement by the voltmeter method . with the resistance ...
Contents
CHAPTER IOBSERVATIONAL DATAGRAPHICAL REPRE | 1 |
CHAPTER IIMEASUREMENT OF RESISTANCE | 14 |
Measurement of Specific Resistance | 20 |
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a₁ accuracy adjustment alternating current ammeter ampere amplifier apparatus as shown balance ballistic galvanometer battery calibration capacitance cathode centimeter charge circuit coil compute condenser conductors connected constant correction couple Courtesy of Leeds current flowing cycle D'Arsonval damping decrease determined dial direct current discharge electrical electrometer electromotive force electrons electrostatic equal equation errors EXPERIMENT filament flux frequency gauge high resistance instrument ions junction K₁ known laboratory Leeds and Northrup low resistance manometer maximum McLeod Gauge mercury metal meter method millimeters mutual inductance needle obtained ohms oscillator plate current Plot a curve position potential difference potentiometer precision measure pressure proportional pyrometer quadrants quantity R₁ R₂ ratio reading rheostat sensitivity shown in Fig shunt slide wire standard cell standard resistance switch temperature thermocouple torque unit unknown usually V₁ vacuum tube variable velocity voltage voltmeter volts wave length Wheatstone bridge zero