GATE Sensors and Bioinstrumentation: Biopotentials and Electrodes – Previous Year Questions
15 GATE previous year questions on Biopotentials and Electrodes (Sensors and Bioinstrumentation, Biomedical Engineering) with answers and explanations, from every paper.
- GATE 2020 BM Q22 – How many electrodes are used to record a standard 12-lead ECG?
- GATE 2020 BM Q36 – A mammalian nerve cell initially rests at −80 mV. A drug lowers intracellular K⁺ from 150 to 55 mmol/L while external K⁺ is unchanged. Use R=8.315…
- GATE 2020 BM Q65 – A cell is driven by current i(t)=u(t). Its linear membrane model has impulse response h(t)=Ae-t/u(t), with A=−34 V/s and τ=3 ms. Find membrane-voltage…
- GATE 2021 BM Q48 – Compared with ECG amplifiers, surface-EMG amplifiers have which typical characteristics?
- GATE 2022 BM Q30 – Which statements about biomedical electrical measurements are true?
- GATE 2022 BM Q43 – In the shown Einthoven frontal ECG triangle, augmented lead vectors bisect bipolar lead vectors. At the R-wave peak, cardiac vector M has magnitude 5…
- GATE 2023 BM Q34 – At a given time, a cardiac dipole of magnitude 3 mV is oriented at −45° to the horizontal axis. Assuming Einthoven frontal-plane configuration, find…
- GATE 2023 BM Q61 – For a membrane at 27°C, use the Goldman–Hodgkin–Katz equation to find the magnitude of membrane potential in mV to one decimal. Ion concentrations…
- GATE 2024 BM Q45 – To isolate alpha EEG, the diagram cascades ideal high-pass cutoff fh,low-pass cutoff fl,then ADC sampling at fs. Which choice works?
- GATE 2024 BM Q49 – Which changes are typical in surface EMG during muscle fatigue?
- GATE 2024 BM Q58 – An ECG channel has bandwidth 0.5–100 Hz. A single ADC digitizes eight channels. Find the minimum aggregate sampling rate in Hz, nearest integer.
- GATE 2025 BM Q28 – In a human ECG, atrial repolarization is usually masked by which component?
- GATE 2025 BM Q31 – A low-pass filter with 250 Hz cutoff is NOT suitable for recording which signal?
- GATE 2026 BM Q43 – An EEG PSD has band-average values (μV²/Hz): 0.4–4 Hz:3; 4–8:4; 8–13:8; 13–30:5; 30–100:3. The noise floor is 2 μV²/Hz. Find the alpha-band SNR in dB…
- GATE 2026 BM Q44 – Match ECG waveforms X,Y,Z in Panel 1 with (i) normal condition, (ii) atrial flutter, (iii) atrioventricular block.