Basic Electrical Measurements |
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Page 244
... shield connected to one end of the resistor , as shown in ( b ) . There is capacitance from the resistor to the shield , but this is definite in amount and is independent of any other objects placed near the resistor . There is ...
... shield connected to one end of the resistor , as shown in ( b ) . There is capacitance from the resistor to the shield , but this is definite in amount and is independent of any other objects placed near the resistor . There is ...
Page 245
... shields . CAB A ΙΑ IB ( a ) B ( d ) ( b ) B ( ၁ ) B ICBG CBC B CAB ICB CBG ( f ) ( e ) FIG . 12-1 . Control of stray capacitance by shielding . ( a ) Unshielded resistor . ( b ) Resistor with shield . ( c ) Equivalent circuit of ( b ) ...
... shields . CAB A ΙΑ IB ( a ) B ( d ) ( b ) B ( ၁ ) B ICBG CBC B CAB ICB CBG ( f ) ( e ) FIG . 12-1 . Control of stray capacitance by shielding . ( a ) Unshielded resistor . ( b ) Resistor with shield . ( c ) Equivalent circuit of ( b ) ...
Page 420
... shield to shield it from the effect of stray magnetic fields . The damping is provided by two vanes , shown at the bottom , which FIG . 17-17 . Electrodynamometer instrument mechanism . ( Cour- tesy of Weston Electrical Instrument ...
... shield to shield it from the effect of stray magnetic fields . The damping is provided by two vanes , shown at the bottom , which FIG . 17-17 . Electrodynamometer instrument mechanism . ( Cour- tesy of Weston Electrical Instrument ...
Contents
DEVELOPMENT OF THE ELECTRICAL UNITS | 1 |
EXPERIMENTAL PROCEDURES ERRORS | 13 |
AIDS TO COMPUTATION | 39 |
Copyright | |
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accuracy adjustment alternating current ammeter amount ampere arrangement balance battery bridge circuit burden C₁ calibration capacitance capacitor cent comparison component computed condenser connected constant construction convenient copper correct Courtesy critical damping current transformer curve decade deflection detector diagram dial dissipation factor effect electrical electrodes electrodynamometer equal equation factor field Figure flux frequency galvanometer gives impedance increase indicated inductor instrument insulating laboratory load magnetic Maxwell bridge measurements ment meter method number of turns ohmmeter ohms oscillator oscillograph parallel phase angle pointer potential transformer potentiometer primary quantity R₁ R₂ Radio range ratio arms reactance reading reference resistance resistor result rheostat scale search coil secondary sensitivity shield shown in Fig shows shunt slide wire standard cell switch temperature terminals thermocouple Thevenin's theorem tion torque unbalance units unknown vector voltage voltmeter wattmeter Wheatstone bridge winding zero