Biomedical Engineering GATE 2024 Questions with Answer
Ques 27 Biomedical Instrumentation
A person standing one meter away from a 4000 curie radioactive source receives a lethal dose of radiation in about 5 minutes. At 3 meters away from the same source, the time in which he will receive the same lethal dose is _________ minutes. Give your answer rounded off to the nearest integer.
45 is the correct answer.
Ques 28 Biomedical Instrumentation
If a circular ultrasound transducer of radius a=8 mm operating at a central frequency of 1 MHz has a pressure beam pattern in a medium as given below:
P(r,0)∝sin(ka2/4r)
Here, k is the wave number, r is the axial distance from the transducer face, and the speed of sound in the medium is 1600 ms⁻¹. The reduction in intensity between r=8 cm and r=16 cm is _________ dB. Give your answer as a positive quantity.
6.02 is the correct answer.
Ques 29 Biomedical Instrumentation
The source in the figure is a current source and the circuit is in steady state. At t=0.57 seconds, the value of v in the circuit given below is _________ volts. Give your answer.
-0.43 is the correct answer.
Ques 30 Biomedical Instrumentation
The equivalent impedance, ZAB, in the circuit given below is _________ Ω. Give your answer rounded off to one decimal place.
1.5 is the correct answer.
Ques 31 Biomedical Instrumentation
The bandwidth of each ECG channel in an 8 channel ECG machine is 100 Hz. If a single ADC is used to digitize data from 8 ECG channels then the minimum ADC sampling rate is _________ Hz. Give your answer rounded off to the nearest integer.
1600 is the correct answer.
Ques 32 Biomedical Instrumentation
In the figure below, the diode is ideal. The current reading shown in the ammeter is _________ A. Give your answer rounded off to the nearest integer.
0 is the correct answer.
Ques 33 Biomedical Instrumentation
A bio-potential signal of 4 mV on the skin surface was fed to an amplifier with a differential gain of 2000. The noise in the signal is 1000 mV. If the amplifier output produces a noise output of 200 mV, the common mode rejection ratio of the amplifier is _________ dB. Give your answer rounded to the nearest integer.
46 is the correct answer.
Ques 34 Biomedical Instrumentation
In a motor nerve conduction velocity experiment, the distance between the distal and the recording sites is 4 cm and the distance between the proximal and the recording sites is 24 cm. The distal and proximal latencies were recorded as 6 ms and 10 ms, respectively. The nerve conduction velocity is _________ meters per second. Give your answer rounded off to the nearest integer.
40 is the correct answer.
Ques 35 Biomedical Signal Processing
A neurologist needs to observe the alpha wave in EEG recordings of a patient. The system block diagram with ideal filter blocks is shown below. Which one of the following design choices is correct?
Ques 36 Biomedical Signal Processing
A neurologist needs to observe the alpha wave in EEG recordings of a patient. The system block diagram with ideal filter blocks is shown below. Which one of the following design choices is correct?
Ques 37 Biomedical Signal Processing
Which of the following is/are TRUE for a surface electromyography (SEMG) signal of a muscle experiencing fatigue?
Ques 38 Biomedical Signal Processing
The impulse response of a digital filter is given by:
h[n]=δ[n]-δ[n-1]
If the input to the filter is x[n]=u[n], then ∑∞(n=-∞)y[n], where y[n]=x[n]*h[n] is _________.
Give your answer rounded off to the nearest integer.
1 is the correct answer.
Ques 39 Biomedical Signal Processing
In the figure below, the Fourier series of v(t), in volts, is given as:
v(t)=v0+2 cos(ω0t)+5 cos(3ω0t)+cos(5ω0t)
The capacitor is a short circuit for all AC signals. The power absorbed by the 12 Ω resistor is _________ W. Give your answer rounded off to the nearest integer.
1 is the correct answer.
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