Question: 1. A null - type Wheatstone bridge is used to accurately measure the resistance of a nickel resistance thermometer during calibration procedure. The circuit

1. A null - type Wheatstone bridge is used to accurately measure the resistance of a nickel resistance thermometer during calibration procedure. The circuit shown below is used. Given R1 = 123.7 Q, R2 = 127.4 Q. The thermometer is inserted as Rx and R3 is adjusted until the galvanometer reads OV. At this point R3= 117.30. Calculate the resistance of the thermometer. Itotal R1 11 A 12 R3 R2 G B RX

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