GATE Measurements and Control Systems: Bridges and Impedance Measurement – Previous Year Questions

7 GATE previous year questions on Bridges and Impedance Measurement (Measurements and Control Systems, Biomedical Engineering) with answers and explanations, from every paper.

1. GATE 2020 BM Q37 (2 marks, Multiple choice) – Four initially equal pressure-catheter resistors are arranged as shown. Pressure lengthens R₂,R₄ and increases cross-sectional area of R₁,R₃,…
2. GATE 2020 BM Q43 (2 marks, Multiple choice) – Match bridges P Maxwell,Q Kelvin double,R Hay,S Schering to applications K low-resistance measurement,L medium-Q coil inductance,M capacitance,N…
3. GATE 2022 BM Q19 (1 mark, Multiple choice) – For the balanced Owen bridge shown, find the unknown inductance Lₓ and resistance Rₓ.
4. GATE 2022 BM Q61 (2 marks, Numerical answer) – The shown catheter pressure sensor uses a diaphragm with four identical Wheatstone-bridge gauges. Each has nominal resistance 10 kΩ, gauge factor 40…
5. GATE 2023 BM Q22 (1 mark, Multiple choice) – Which bridge is NOT used for inductance measurement?
6. GATE 2023 BM Q64 (2 marks, Numerical answer) – A diaphragm full-Wheatstone-bridge strain transducer has R₁,R₄ in compression and R₂,R₃ in tension. Every resistor is 200 Ω unloaded and changes by 20…
7. GATE 2025 BM Q63 (2 marks, Numerical answer) – The Wheatstone bridge shown is initially balanced. Straining its cylindrical resistor Rstrain along length l produces Vout =10 mV for 1 V excitation.…