Measurement Errors and Uncertainty - Measurements and Control Systems - Biomedical Engineering Previous Year Questions

1

2021 · Biomedical Engineering · Measurements and Control Systems · Measurement Errors and Uncertainty

Biomedical Engineering (BM) 2021

As shown in the circuit below, a constant voltage source is connected to two ideal resistors.

The voltage drop across a resistor is measured using two different voltmeters V1 and V2 at five different time instances and the following values are recorded from V1 and V2.

Time instances	1	2	3	4	5
Readings on V1 (V)	2.479	2.483	2.495	2.508	2.511
Readings on V2 (V)	2.465	2.468	2.470	2.472	2.475

Which of the following is TRUE?

A

V1 is less accurate, V2 is more precise

B

V1 is more accurate, V2 is more precise

C

V1 is less accurate, V2 is less precise

D

V1 is more accurate, V2 is less precise

Open complete paper

2

2021 · Biomedical Engineering · Measurements and Control Systems · Measurement Errors and Uncertainty

Biomedical Engineering (BM) 2021

In a measurement process, groups A and B recorded 10 and 15 values, respectively. The arithmetic means and standard deviations of group A are μ_A = 35, σ_A = 0.4 and group B are μ_B = 38, σ_B = 0.6, respectively. The standard deviation for the combined set of group A and group B measurements is ____. (rounded off to two decimal places)

Check answer

Open complete paper

3

2022 · Biomedical Engineering · Measurements and Control Systems · Measurement Errors and Uncertainty

Biomedical Engineering (BM) 2022

Independent voltage measurements (\(\mu \pm \sigma\)) of three sensors where \(\mu\) and \(\sigma\) are the mean and standard deviation of the measurements, respectively are as follows: \(v_1 = 4.52 \pm 0.02 V\), \(v_2 = 4.21 \pm 0.20 V\), \(v_3 = 3.96 \pm 0.15 V\). The measurement uncertainty in \(v_1 + v_2 + v_3\) is ________ V (rounded off to two decimal places).

Check answer

Open complete paper

4

2023 · Biomedical Engineering · Measurements and Control Systems · Measurement Errors and Uncertainty

Biomedical Engineering (BM) 2023

A 20 mV DC signal has been superimposed with a 10 mV RMS band-limited Gaussian noise with a flat spectrum upto 5 kHz. If an integrating voltmeter is used to measure this DC signal, what is the minimum averaging time (in seconds) required to yield a 99 % accurate result with 95 % certainty?

A

0.1

B

1.0

C

5.0

D

10.0

Open complete paper

5

2024 · Biomedical Engineering · Measurements and Control Systems · Measurement Errors and Uncertainty

Biomedical Engineering (BM) 2024

The measured current through a device is 5 A, the voltage measured across the device is 20 V. The ammeter and the voltmeter used for these measurements have a measurement uncertainty of 1% each. The maximum error in estimation of impedance of the device is ________ mΩ. Give your answer rounded to the nearest integer.

Check answer

Open complete paper

6

2025 · Biomedical Engineering · Measurements and Control Systems · Measurement Errors and Uncertainty

Biomedical Engineering (BM) 2025

The Electroencephalogram (EEG) voltage measured by a test device is 2.4 μV, while the reference device measured it to be 3.0 μV. What is the percentage error of the test device?

A

25%

B

20%

C

10%

D

0.6%

Open complete paper

7

2026 · Biomedical Engineering · Measurements and Control Systems · Measurement Errors and Uncertainty

Biomedical Engineering (BM) 2026

A resistor with \(60 \pm 2\ \Omega\) resistance is part of a circuit. The voltage measured across this resistor is \(120 \pm 10\ \text{mV}\) (millivolts). The uncertainty in the estimation of the power dissipated by the resistor is __________ mW (milliwatts).
(Round off to one decimal place).

Check answer

Open complete paper