GATE Measurements: Electrical bridges – Previous Year Questions

13 GATE previous year questions on Electrical bridges (Measurements, Instrumentation Engineering) with answers and explanations, from every paper.

1. GATE 2021 IN Q62 (2 marks, Numerical answer) – The bridge voltmeter reads zero with R 1=100\ , R 2=110\ , R 3=90\ , and R 1/R 2=R A/R B. The value of R 4 is .
2. GATE 2022 IN Q22 (1 mark, Multiple select) – In which of the following bridge(s) is the balancing condition frequency-independent?
3. GATE 2022 IN Q63 (2 marks, Numerical answer) – The bridge shown balances with R 1=100\ , R 2=210\ , C 2=2.9 μF, and R 4=50\ . The 2 kHz sine-wave generator supplies 10 V peak-to-peak. The value of…
4. GATE 2022 IN Q65 (2 marks, Numerical answer) – The Wheatstone bridge has R 1=1.5 k and R 2=R 3=R 4=1 k. Initially the switch is open and the voltage between C and D is V CD. Closing it at t=0…
5. GATE 2023 IN Q30 (1 mark, Numerical answer) – When the bridge given below is balanced, the current through the resistor Ra is mA (rounded off to two decimal places).
6. GATE 2023 IN Q54 (2 marks, Numerical answer) – Four strain gauges R A,R B,R C,R D, each nominally R, form the bridge shown. Under force, R A,R D increase by R and R B,R C decrease by R. The…
7. GATE 2024 IN Q39 (2 marks, Multiple choice) – In the bridge circuit shown in the figure, under balanced condition, the values of R and C respectively, are
8. GATE 2024 IN Q51 (2 marks, Numerical answer) – In the circuit shown, R=4.5 kΩ, R=1.5 kΩ, and the instrumentation amplifier INA is ideal. The equivalent resistance between A and B is kΩ (nearest…
9. GATE 2024 IN Q54 (2 marks, Numerical answer) – Consider the figure shown. For zero deflection in the galvanometer, the required value of resistor Rx is Ω (rounded off to nearest integer).
10. GATE 2025 IN Q45 (2 marks, Multiple choice) – The bridge in Figure (a) has the equivalent circuit in Figure (b). The values of R 1, R 2, and V C are
11. GATE 2025 IN Q56 (2 marks, Numerical answer) – The shown AC bridge has R=300\ , R 1=1000\ , R 2=500\ , L=30 mH, and detector D. At balance, excitation frequency is kHz (rounded to two decimal…
12. GATE 2025 IN Q61 (2 marks, Numerical answer) – The galvanometer G in the shown circuit has internal resistance 100 Ω. Its current I G is μA (rounded to the nearest integer).
13. GATE 2026 IN Q24 (1 mark, Multiple choice) – The Kelvin double bridge is used to measure valued resistances and has resistors in its construction.