Biomedical Electronics MCQs

1. : What does an ECG machine measure?
(A) Brain activity
(B) Heart’s electrical activity
(C) Lung capacity
(D) Blood pressure

2. : Which biomedical device is used to deliver insulin automatically to diabetic patients?
(A) Defibrillator
(B) ECG machine
(C) Infusion pump
(D) Insulin pump

3. : What is the main purpose of a pacemaker?
(A) Measure blood glucose
(B) Control heartbeat
(C) Assist breathing
(D) Record brain waves

4. : EEG stands for:
(A) Electrocardiogram
(B) Electroencephalogram
(C) Electrogastrogram
(D) Electronic Ear Graph

5. : Which sensor is used to measure blood oxygen saturation?
(A) ECG sensor
(B) Thermistor
(C) Pulse oximeter
(D) EMG sensor

6. : What does EMG measure?
(A) Eye movement
(B) Muscle electrical activity
(C) Brainwaves
(D) Temperature

7. : Which type of electrode is commonly used in ECG?
(A) Carbon electrode
(B) Silver-silver chloride electrode
(C) Gold-plated electrode
(D) Copper electrode

8. : What is the function of a defibrillator?
(A) Detect heart murmur
(B) Monitor blood pressure
(C) Restore normal heartbeat
(D) Measure lung volume

9. : A spirometer is used to:
(A) Measure electrical resistance
(B) Measure lung function
(C) Measure heart rate
(D) Monitor EEG

10. : Biomedical signals are typically:
(A) Digital
(B) High voltage
(C) Analog and low amplitude
(D) Binary

11. : Which amplifier is commonly used in biomedical signal acquisition?
(A) Differential amplifier
(B) Power amplifier
(C) Audio amplifier
(D) Operational amplifier

12. : What is the frequency range of EEG signals?
(A) 0.5 to 100 Hz
(B) 100 to 500 Hz
(C) 1 to 10 kHz
(D) 0.01 to 0.5 Hz

13. : What type of noise is commonly found in biomedical signals?
(A) Thermal noise
(B) 50/60 Hz power line interference
(C) RF noise
(D) Shot noise

14. : The biopotentials measured by ECG are primarily due to:
(A) Skin resistance
(B) Muscle activity
(C) Ion exchange in the heart
(D) Nerve impulses in the brain

15. : Which of the following is a non-invasive diagnostic technique?
(A) ECG
(B) Biopsy
(C) Surgery
(D) Blood sampling

16. : Which of the following blocks external noise in ECG circuits?
(A) Transformer
(B) Band-pass filter
(C) Notch filter
(D) Diode

17. : Which component is crucial for signal isolation in patient monitoring systems?
(A) Resistor
(B) Opto-isolator
(C) Capacitor
(D) Transistor

18. : What is telemetry in biomedical electronics?
(A) A type of sensor
(B) Remote transmission of data
(C) Electrical impedance matching
(D) Magnetic field measurement

19. : Which biomedical signal is typically used for sleep studies?
(A) ECG
(B) EMG
(C) EEG
(D) EOG

20. : Which system measures blood flow using sound waves?
(A) X-ray
(B) CT scan
(C) Doppler ultrasound
(D) MRI

21. : What is the function of an infusion pump?
(A) Monitor glucose
(B) Provide artificial respiration
(C) Deliver controlled medication doses
(D) Record brain activity

22. : Artifact in biomedical signals refers to:
(A) A normal pattern
(B) A medical device
(C) Unwanted interference
(D) Useful data

23. : What does the P-wave in an ECG represent?
(A) Atrial depolarization
(B) Ventricular depolarization
(C) Atrial repolarization
(D) Ventricular repolarization

24. : Biomedical signal processing is important for:
(A) Signal distortion
(B) Noise amplification
(C) Signal analysis and feature extraction
(D) Data encryption

25. : The term ‘electrode gel’ is used to:
(A) Insulate the electrodes
(B) Lubricate sensors
(C) Reduce impedance between skin and electrode
(D) Increase voltage gain