engineering recuitment GATE IN Test Series 2023-24 Mock Test Electrical and Electronics Measurements Measurement of R/L/C Using Bridge Circuits Basic Galvanometer
A highly sensitive galvanometer can detect a current as low as 0.1 nA. This galvanometer is used in a Wheatstone bridge as a detector.
Each arm of the bridge has a resistance of 2 kΩ. The input voltage applied to the bridge is 20 V. Calculate the smallest change in resistance which can be detected.
1
50 μΩ
2
20 μΩ
3
40 μΩ
4
80 μΩ