Biomedical Electronics MCQs January 8, 2026July 11, 2024 by u930973931_answers 50 min Score: 0 Attempted: 0/50 Subscribe 1. What is the fundamental frequency of a 50 Hz square wave? (A) 200 Hz (B) 100 Hz (C) 25 Hz (D) 50 Hz 2. Which of the following is not a characteristic of a perfect diode? (A) Infinite reverse current (B) High reverse breakdown voltage (C) Low forward voltage drop (D) Low reverse leakage current 3. What does EEG stand for in biomedical instrumentation? (A) Electromyography (B) Electroencephalography (C) Electrocardiography (D) Electron Energy Gain 4. The term ‘ECG’ refers to: (A) Electrocardiography (B) Electrocardiograph (C) Electrocardiogram (D) Electromyogram 5. Which component is typically used for signal amplification in biomedical instruments? (A) Zener diode (B) Operational amplifier (C) SCR (D) MOSFET 6. What is the unit of measurement for electrical resistance? (A) Volt (B) Henry (C) Ohm (D) Farad 7. Which of the following is not a method for non-invasive blood glucose monitoring? (A) Near-infrared spectroscopy (B) Impedance spectroscopy (C) Blood gas analysis (D) Optical coherence tomography 8. Which type of electrode is used for measuring the ECG signal? (A) Aluminum-aluminum oxide (B) Copper-copper sulfate (C) Zinc-zinc oxide (D) Silver-silver chloride 9. What is the typical wavelength range for visible light? (A) 200 – 400 nm (B) 400 – 700 nm (C) 700 – 1000 nm (D) 1000 – 2000 nm 10. Which of the following is used as a bio-signal electrode gel? (A) Silicon (B) Paraffin wax (C) Sodium chloride (D) Collagen 11. What does the acronym ‘MRI’ stand for? (A) Magnetic Resonance Instrument (B) Medical Radiation Instrument (C) Magnetic Resonance Imaging (D) Medical Resonance Imaging 12. Which of the following is a characteristic of capacitive transducers? (A) Low sensitivity (B) Low stability (C) High power consumption (D) High linearity 13. Which type of sensor is commonly used for measuring blood pressure non-invasively? (A) Piezoelectric sensor (B) Strain gauge (C) Thermistor (D) Sphygmomanometer 14. Which of the following is a biopotential electrode used for ECG measurement? (A) Thermocouple (B) Ag/AgCl electrode (C) Galvanometer (D) Photodiode 15. What is the purpose of a transducer in biomedical instrumentation? (A) To convert one form of energy into another (B) To process electrical signals (C) To provide power to the circuit (D) To protect the circuit from overvoltage 16. Which of the following is not a characteristic of an ideal op-amp? (A) Infinite input impedance (B) Infinite gain (C) Zero output impedance (D) Infinite bandwidth 17. Which type of filter is typically used to remove high-frequency noise from biological signals? (A) Band-pass filter (B) High-pass filter (C) Low-pass filter (D) Notch filter 18. What is the function of a strain gauge in biomedical applications? (A) To measure temperature (B) To measure humidity (C) To measure light intensity (D) To measure pressure 19. Which of the following is an example of a biopotential signal? (A) Blood flow rate (B) Body temperature (C) Muscle contraction (D) Respiratory rate 20. What is the typical range of frequencies for EEG signals? (A) 0.1 – 1 Hz (B) 1 – 10 Hz (C) 1 – 1000 Hz (D) 1 – 100 Hz 21. Which of the following is a feature of pulse oximeters? (A) Measure oxygen saturation (B) Measure blood glucose level (C) Measure blood pressure (D) Measure body temperature 22. What is the primary purpose of an A/D converter in biomedical instruments? (A) To convert analog signals to digital form (B) To display digital signals (C) To amplify analog signals (D) To convert digital signals to analog form 23. Which of the following is used to measure the electrical activity of the heart? (A) Spirometer (B) Oximeter (C) Electrocardiograph (D) Plethysmograph 24. Which type of sensor is commonly used for measuring temperature in biomedical applications? (A) Thermocouple (B) Photodiode (C) Piezoelectric sensor (D) Sphygmomanometer 25. What does the acronym ‘CT’ stand for in the context of medical imaging? (A) Catheterization Tomography (B) Cytological Tomography (C) Computerized Tomography (D) Chemical Tomography 26. Which of the following is an example of an active electrode used in biopotential measurements? (A) Copper electrode (B) Zinc electrode (C) Aluminum electrode (D) Silver-silver chloride electrode 27. What does the acronym ‘EMG’ stand for? (A) Electromagnetic Gain (B) Electromyography (C) Electrostatic Magnetism (D) Electrocardiographic Measurement 28. Which of the following is a non-invasive method for measuring blood pressure? (A) Intra-arterial catheter (B) Piezoelectric sensor (C) Sphygmomanometer (D) Strain gauge 29. Which type of electrode is used for recording brain activity in EEG? (A) Silver-silver chloride electrode (B) Platinum electrode (C) Gold electrode (D) Titanium electrode 30. What is the primary function of an impedance meter in biomedical applications? (A) Measure blood pressure (B) Measure oxygen saturation (C) Measure heart rate (D) Measure electrical resistance 31. Which of the following is a biopotential signal associated with the heart? (A) EMG (B) EOG (C) EEG (D) ECG 32. What is the purpose of a defibrillator in emergency medicine? (A) Measure blood glucose level (B) Measure blood pressure (C) Monitor brain activity (D) Treat cardiac arrhythmias 33. Which of the following is a characteristic of a capacitive transducer? (A) High sensitivity (B) Low power consumption (C) Low linearity (D) Low stability 34. What is the purpose of a pulse oximeter in clinical settings? (A) Measure blood pressure (B) Measure body temperature (C) Measure oxygen saturation (D) Measure heart rate 35. Which of the following is a biopotential signal associated with eye movements? (A) EOG (B) ECG (C) EEG (D) EMG 36. What is the function of a thermistor in biomedical instruments? (A) To measure pressure (B) To measure humidity (C) To measure light intensity (D) To measure temperature 37. Which of the following is a typical application of photoplethysmography (PPG)? (A) Measure blood glucose level (B) Measure blood pressure (C) Measure blood oxygen saturation (D) Measure heart rate 38. What is the primary function of a catheterization lab in medical diagnostics? (A) Perform angiography and stenting (B) Measure blood glucose level (C) Perform EEG monitoring (D) Perform CT scans 39. Which type of sensor is commonly used for measuring respiratory rate non-invasively? (A) Thermocouple (B) Respiratory belt (C) Piezoelectric sensor (D) Photodiode 40. What is the primary purpose of a flowmeter in biomedical applications? (A) Measure blood pressure (B) Measure blood flow rate (C) Measure oxygen saturation (D) Measure heart rate 41. Which of the following is a characteristic of an ideal voltmeter? (A) High loading effect (B) Low sensitivity (C) Infinite input impedance (D) Limited bandwidth 42. What does the acronym ‘PET’ stand for in medical imaging? (A) Positron Emission Tomography (B) Photo Emission Tomography (C) Proton Emission Tomography (D) Positron Emitting Tomography 43. Which of the following is a biopotential signal associated with muscle activity? (A) ECG (B) EMG (C) EEG (D) EOG 44. What is the typical frequency range of EMG signals? (A) 0.1 – 1 Hz (B) 1 – 10 Hz (C) 100 – 1000 Hz (D) 10 – 100 Hz 45. Which of the following is a characteristic of a photodiode used in biomedical applications? (A) High sensitivity to infrared light (B) High output impedance (C) Low response time (D) Low dynamic range 46. What is the primary function of an ECG monitor in healthcare settings? (A) Measure blood pressure (B) Measure oxygen saturation (C) Monitor heart activity (D) Monitor brain activity 47. Which of the following is a biopotential signal associated with brain activity? (A) EMG (B) ECG (C) EOG (D) EEG 48. What is the purpose of a transducer in ultrasound imaging? (A) To amplify ultrasound signals (B) To transmit and receive ultrasound waves (C) To process digital images (D) To display patient data 49. Which of the following is a characteristic of a strain gauge used in biomedical applications? (A) High sensitivity to temperature changes (B) High linearity (C) Low response time (D) Low mechanical robustness 50. What is the primary function of a pH meter in biomedical laboratories? (A) Measure blood pressure (B) Measure oxygen saturation (C) Measure heart rate (D) Measure pH level of solutions