engineering recuitment GATE IN Test Series 2023-24 Mock Test Electrical and Electronics Measurements Measurement of R/L/C Using Bridge Circuits Measurement of Resistance
The figure below shows the schematic diagram of a Wheatstone bridge values of the bridge elements. The battery voltage is 5V and its internal resistance is negligible. The galvanometer has a sensitivity of 10 mm/μA and internal resistance of 100 Ω.
If there is an unbalance in arm BC, i.e., the resistance of arm BC becomes 2005 Ω, then
1
Thevenin voltage across galvanometer is 2.77 mV
2
Thevenin resistance across galvanometer is 734 Ω
3
The galvanometer current is 4.62 μA
4
Galvanometer deflection is 33.2 mm