Exam Details
| Subject | Electronic Measurement and Instruments | |
| Paper | ||
| Exam / Course | Diploma In Electronics And Communication Engineering (DECVI)/ Advanced Level Certificate Course In Electronics And Communication Engineering (ACEVI)/ | |
| Department | School of Engineering & Technology (SOET) | |
| Organization | indira gandhi national open university | |
| Position | ||
| Exam Date | June, 2016 | |
| City, State | new delhi, |
Question Paper
1. Objective Type Questions (Fill in the blanks/Choose the best/State true or false)
In measurement systems, which one of the following static characteristics is desirable?
Accuracy
Sensitivity
Reproducibility
All of the above
The input resistance of a CRO is of the order of
A quantity whose magnitude has a definite repeating cycle is called transient. [True/False]
The deviation of the true value from the desired value is called
The frequency range of moving iron instruments is
20Hz to 20kHz
10 Hz to 30 kHz
20 Hz to 300 kHz
0 to 125 Hz
In a CRT, the focusing anode is located before pre-accelerating anode. [True/False]
An oscilloscope has an input capacitance of 50 pF and a resistance of 2 MQ with a voltage divider ratio of 10. The parameters of high impedance probe are
C1 =5·55 pF, R1 =18 MQ
C1 3·33 pF, R1 9 MQ
C1 =11·1 pF, R1 =18 MQ
C1 5·55 pF, R1 9 MQ
2. What do you mean by the terms static characteristics and dynamic characteristics of an instrument Explain in brief the various static and dynamic characteristics· of an instrument.
Give the circuit diagram of a general rectifier type AC voltmeter and explain the operation of the same.
What is the function of a multiplier in a basic D'Arsonval movement converted DC voltmeter? Prove that the value of the multiplier required is given as
Rs=V/Im -Rm
where V full range voltage of the instrument, 1m= full scale deflection current, Rm iIltemal resistance of movement.
4. What are digital voltmeters (DVMs) List the operation and performance characteristics of a DVM. Explain the operation of a Ramp type DVM with the help of a neatly labelled block diagram and also list their advantages and disadvantages.
5. Give the block diagram of a general purpose Cathode Ray Oscilloscope (CRO). List the functions of various blocks. What is the advantage of using a negative high voltage supply?
Explain the operation of a passive voltage probe having high impedance. Give its circuit diagram and prove that
Vout Rin x Vin/Rin R1
Explain the operation of a Spectrum Analyzer with the help of a neatly labelled block diagram.
7. Write technical notes on any two of the following:
Digital Phase Meter
Analog Multimeter
AF Signal Generator
Vertical Deflection System
In measurement systems, which one of the following static characteristics is desirable?
Accuracy
Sensitivity
Reproducibility
All of the above
The input resistance of a CRO is of the order of
A quantity whose magnitude has a definite repeating cycle is called transient. [True/False]
The deviation of the true value from the desired value is called
The frequency range of moving iron instruments is
20Hz to 20kHz
10 Hz to 30 kHz
20 Hz to 300 kHz
0 to 125 Hz
In a CRT, the focusing anode is located before pre-accelerating anode. [True/False]
An oscilloscope has an input capacitance of 50 pF and a resistance of 2 MQ with a voltage divider ratio of 10. The parameters of high impedance probe are
C1 =5·55 pF, R1 =18 MQ
C1 3·33 pF, R1 9 MQ
C1 =11·1 pF, R1 =18 MQ
C1 5·55 pF, R1 9 MQ
2. What do you mean by the terms static characteristics and dynamic characteristics of an instrument Explain in brief the various static and dynamic characteristics· of an instrument.
Give the circuit diagram of a general rectifier type AC voltmeter and explain the operation of the same.
What is the function of a multiplier in a basic D'Arsonval movement converted DC voltmeter? Prove that the value of the multiplier required is given as
Rs=V/Im -Rm
where V full range voltage of the instrument, 1m= full scale deflection current, Rm iIltemal resistance of movement.
4. What are digital voltmeters (DVMs) List the operation and performance characteristics of a DVM. Explain the operation of a Ramp type DVM with the help of a neatly labelled block diagram and also list their advantages and disadvantages.
5. Give the block diagram of a general purpose Cathode Ray Oscilloscope (CRO). List the functions of various blocks. What is the advantage of using a negative high voltage supply?
Explain the operation of a passive voltage probe having high impedance. Give its circuit diagram and prove that
Vout Rin x Vin/Rin R1
Explain the operation of a Spectrum Analyzer with the help of a neatly labelled block diagram.
7. Write technical notes on any two of the following:
Digital Phase Meter
Analog Multimeter
AF Signal Generator
Vertical Deflection System
Other Question Papers
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