Basic Electrical Measurements |
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Page 86
... specimen , such as a condenser or a length of cable , can be discharged after the test measurement . Figure 4-27 indicates a measurement being made on a sample of insulating material in sheet form . A full - sized metal disk is used as ...
... specimen , such as a condenser or a length of cable , can be discharged after the test measurement . Figure 4-27 indicates a measurement being made on a sample of insulating material in sheet form . A full - sized metal disk is used as ...
Page 378
... specimen material has high permeability , but may become important under other conditions . There is always some ... specimen , respectively , and μo is the permeability of free space ( 4 × 10-7 in the MKS system ) . ( The " apparent ...
... specimen material has high permeability , but may become important under other conditions . There is always some ... specimen , respectively , and μo is the permeability of free space ( 4 × 10-7 in the MKS system ) . ( The " apparent ...
Page 384
... Specimen H Coll Clamping Shoe FIG . 16-13 . Diagram of the magnetic circuit of the Fahy simplex permeameter . 100 , so that the galvanometer is practically direct reading . The permeameter as shown can be used for fields up to 300 ...
... Specimen H Coll Clamping Shoe FIG . 16-13 . Diagram of the magnetic circuit of the Fahy simplex permeameter . 100 , so that the galvanometer is practically direct reading . The permeameter as shown can be used for fields up to 300 ...
Contents
DEVELOPMENT OF THE ELECTRICAL UNITS | 1 |
EXPERIMENTAL PROCEDURES ERRORS | 18 |
AIDS TO COMPUTATION | 41 |
Copyright | |
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a-c bridge accuracy adjustment alternating current ammeter amplifier arrangement balance battery bridge circuit C₁ calibration capacitance capacitor cent comparison component computed condenser connected constant construction convenient copper correct Courtesy critical damping current transformer curve cycles decade deflection depends detector diagram dial dissipation factor effect electrical electrodynamometer equal equation error factor field Figure flux frequency galvanometer give impedance indicated inductance 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 range ratio arms reading reference resistance resistor result rheostat scale secondary sensitivity shielding shown in Fig shows shunt slide wire standard cell switch temperature terminals thermocouple Thevenin's theorem tion torque unbalance unknown usually volt voltage voltmeter volts wattmeter Wheatstone bridge winding zero μα