Exam Details
| Subject | Electrical Measurements And Measuring Instruments | |
| Paper | ||
| Exam / Course | B.Tech. VIEP- Electrical Engineering III (BTCSVI/BTECVI/BTELVI) | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2015 | |
| City, State | new delhi, |
Question Paper
Describe the difference between deflection and null type of instruments, giving suitable examples. Discuss about their accuracy, sensitivity and suitability for dynamic measurements.
State and explain the difference between moving iron and moving coil instruments with the help of a neat diagram.
A galvanometer with an undamped period of 9 seconds and a current sensitivity of 1 MA per scale division is connected to a search coil in a circuit of 4000 ohm resistance. Determine the flux linkage change in the search coil to produce a first swing of 100 divisions, if the logarithmic decrement is 0·2.
Describe the construction and working of a ballistic galvanometer with the help of a neat diagram.
Draw and explain the circuit of a Wheatstone bridge and derive the conditions of balance.
Derive the torque equation for an electrodynamometer type of wattmeter.
Describe the construction and working of an Earth tester. Explain how can it be used for measurement of resistance of an Earthing electrode.
Describe the constructional details and working of a single phase electrodynamometer type of power factor meter.
Derive the equation for balance in Maxwell's inductance-capacitance bridge. Draw the phasor diagram for balance conditions.
A Maxwell's capacitance bridge shown in Figure 1 is used to measure an unknown inductance in comparison with capacitance. The various values at balance are R2 =400 ohm, R3 =600 ohm, R4 =1000 ohm and C4=0.5 MF, Calculate the values of R1 and L1 and also calculate the Q factor of coil, if frequency is 1000 Hz.
<img src='./qimages/15542-5b.jpg'>
6. Describe the constructional details and principle of operations of a d'Arsonval galvanometer. Derive the expression for steady state deflection.
7. Describe briefly the different types of tests that are used for testing of magnetic materials.
8. Draw the block diagram of a general purpose C.R.O. and explain the functions of the following controls:
Intensity
Focus
Horizontal and Vertical Positioning
Synchronization
9. Write short notes on any two of the following:
Harmonic Analyzer
Current Transformer
Potential Transformer
10. Explain with the help of suitable diagram, how an AC potentiometer can be used for the following:
Calibration of Voltmeters
Calibration of Ammeters
Calibration of Wattmeters and Energy meters
Measurement of reactance of a coil
State and explain the difference between moving iron and moving coil instruments with the help of a neat diagram.
A galvanometer with an undamped period of 9 seconds and a current sensitivity of 1 MA per scale division is connected to a search coil in a circuit of 4000 ohm resistance. Determine the flux linkage change in the search coil to produce a first swing of 100 divisions, if the logarithmic decrement is 0·2.
Describe the construction and working of a ballistic galvanometer with the help of a neat diagram.
Draw and explain the circuit of a Wheatstone bridge and derive the conditions of balance.
Derive the torque equation for an electrodynamometer type of wattmeter.
Describe the construction and working of an Earth tester. Explain how can it be used for measurement of resistance of an Earthing electrode.
Describe the constructional details and working of a single phase electrodynamometer type of power factor meter.
Derive the equation for balance in Maxwell's inductance-capacitance bridge. Draw the phasor diagram for balance conditions.
A Maxwell's capacitance bridge shown in Figure 1 is used to measure an unknown inductance in comparison with capacitance. The various values at balance are R2 =400 ohm, R3 =600 ohm, R4 =1000 ohm and C4=0.5 MF, Calculate the values of R1 and L1 and also calculate the Q factor of coil, if frequency is 1000 Hz.
<img src='./qimages/15542-5b.jpg'>
6. Describe the constructional details and principle of operations of a d'Arsonval galvanometer. Derive the expression for steady state deflection.
7. Describe briefly the different types of tests that are used for testing of magnetic materials.
8. Draw the block diagram of a general purpose C.R.O. and explain the functions of the following controls:
Intensity
Focus
Horizontal and Vertical Positioning
Synchronization
9. Write short notes on any two of the following:
Harmonic Analyzer
Current Transformer
Potential Transformer
10. Explain with the help of suitable diagram, how an AC potentiometer can be used for the following:
Calibration of Voltmeters
Calibration of Ammeters
Calibration of Wattmeters and Energy meters
Measurement of reactance of a coil
Other Question Papers
Departments
- Centre for Corporate Education, Training & Consultancy (CCETC)
- Centre for Corporate Education, Training & Consultancy (CCETC)
- National Centre for Disability Studies (NCDS)
- School of Agriculture (SOA)
- School of Computer and Information Sciences (SOCIS)
- School of Continuing Education (SOCE)
- School of Education (SOE)
- School of Engineering & Technology (SOET)
- School of Extension and Development Studies (SOEDS)
- School of Foreign Languages (SOFL)
- School of Gender Development Studies(SOGDS)
- School of Health Science (SOHS)
- School of Humanities (SOH)
- School of Interdisciplinary and Trans-Disciplinary Studies (SOITDS)
- School of Journalism and New Media Studies (SOJNMS)
- School of Law (SOL)
- School of Management Studies (SOMS)
- School of Performing Arts and Visual Arts (SOPVA)
- School of Performing Arts and Visual Arts(SOPVA)
- School of Sciences (SOS)
- School of Social Sciences (SOSS)
- School of Social Work (SOSW)
- School of Tourism & Hospitality Service Sectoral SOMS (SOTHSM)
- School of Tourism &Hospitality Service Sectoral SOMS (SOTHSSM)
- School of Translation Studies and Training (SOTST)
- School of Vocational Education and Training (SOVET)
- Staff Training & Research in Distance Education (STRIDE)
Subjects
- Active Filter Design
- Advanced Control System
- Advanced Power Electronics
- Applied Electromagnetics
- Basics Of Electrical Engineering
- Computer Process Control
- Control System
- Digital Electronics
- Electric Energy Utilization
- Electrical And Electronics Engineering Materials
- Electrical Instrumentation
- Electrical Machine - I
- Electrical Machines - Ii
- Electrical Machines And Electronics
- Electrical Measurements And Measuring Instruments
- Electro Mechanical Energy Conversion - I
- Electro-Mechanical Energy Conversion - Ii
- Electro-Mechanical Energy Conversion-Iii
- Electromagnetic Theory
- Energy Auditing And Analysis
- High Voltage Engineering
- Industrial Drives
- Micro Controllers
- Microprocessor And Applications
- Network Theory
- Power Quality Issues And Remedial Measures
- Power System
- Power System - I
- Stochastic Control Systems
- Switchgear And Protection