Electrical and Electronics Measurements Measurement of R/L/C Using Bridge Circuits Measurement of Resistance
In a Kelvin's double bridge, two set of readings are taken when measuring a low resistance, one with the current in one direction and the other with direction of current reversed. This is done to:
1
Eliminate the effect of contact resistance
2
Eliminate the effect of resistance of leads
3
Correct for changes in battery voltage
4
Eliminate the effect of thermo-electric effects