Electronics Measurement & Instrumentation 2022 Question Paper — Gover…
The 2022 Electronics Measurement & Instrumentation previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Electronics Measurement & Instrumentation
- Course: Electronic Measurement & Instrumentation
- Branch: E&C Engineering
- Year: 2022
- Paper: end-term
- Duration: 180 minutes
- Total marks: 75
Instructions
- Attempt five questions in all, selecting at least two questions from each section.
- All questions carry equal marks.
Questions
Section - A
- Q1. 1.a. Explain the concept of instrumentation and measurement. How they are interrelated? b. Explain the loading effect of series instruments in detail with their relevant expression. [15 marks]
- Q2. 2.a. It is desired to measure the value of voltage across $50\text{ }\text{k}\Omega$ resistor as shown in fig.1 by connecting a $100\text{k}\Omega$ resistance in series. Both the voltmeters have 0-50V range. Find: i. Reading of each voltmeter. ii. The error in which the reading expressed as %age of true value. For the circuit shown in fig.1: b. What are the different types of error in measurement? How the statistical analysis can be done? [15 marks]
- Q3. 3.a. The following data are expected to follow a linear relationship of the form $y = ax+b$. Obtain the best linear relation in accordance with the least square analysis and calculate the standard deviation. [Table data provided: $X_i$: 0.9, 2.3, 3.3, 4.5, 5.6, 6.7; $Y_i$: 1.1, 1.6, 2.6, 3.2, 4.0, 5.0; $\sum X_i=23.4$, $\sum Y_i=17.5$, $\sum X_i Y_i=83.95$, $\sum X_i^2=114.62$] b. Explain with neat diagram the working of AC voltmeter using rectifiers. [15 marks]
- Q4. 4.a. Explain with neat diagram and waveform, the working of True RMS voltmeter. b. A basic d'Arsonval meter movement with internal resistance of $R_m=100\,\Omega$ and a full scale current $1m = 1\text{mA}$ is converted into a multirange d.c voltmeter with ranges of 0-10V, 0-50V, 0-250V and 0-500V. Design a multirange voltmeter and find the resistance range. [15 marks]
Section - B
- Q5. 5.a. Explain the working of Piezo electric effect transducer with neat diagram. b. Explain with neat diagram and waveform the working of LVDT transducer. [15 marks]
- Q6. 6.a. Explain the concept of Thermistors, its working and construction and types in detail. b. A thermistor has a resistance of $3980\,\Omega$ at $0^\circ\text{C}$ and $794\,\Omega$ at $50^\circ\text{C}$. calculate the constant a and b. Also calculate the range of resistance in case the temp changes from $40^\circ\text{C}$ and $100^\circ\text{C}$. [15 marks]
- Q7. 7.a. Explain the concept of lissajous pattern in CRO.Find the frequency ratio for the following patterns as shown in fig. 2 For the patterns shown in fig.2: b. Explain briefly various digital display devices. [20 marks]
- Q8. 8. Write notes on: a. Harmonic distortion Analyzer b. Graphical Information Systems [20 marks]