M.Sc. (Semester II) (CBCS) Examination, 2017
PHYSICS (APPLIED ELECTRONICS)
ELECTRONIC INSTRUMENTATION
Day Date: Friday, 28-04-2017 Max. Marks: 70
Time: 10.30 AM to 01.00 PM
Instructions: Answer any five questions.
Questions 1 and 2 are compulsory.
Attempt any three from Q.3 to Q.7.
Figures to the right indicate full marks.
Use of nonprogrammable calculator is allowed.
Q.1 Choose correct alternatives: 08
It is ability of the sensor to indicate the same output over a period of
time for a constant input
Stability Resolution Impedance Error
A Peizo-electric crystal generates voltage when subjected to
force.
Electrical Mechanical Gravity All of the above
Potentiometer transducers are used for the measurement ofa)
Pressure Displacement Humidity Both and
With the increase in the intensity of light, the resistance of a
photoconductor cella)
Decreases Increases
Remains same Changes randomly
An rms reading voltmeter can accurately measure voltage ofa)
Sine waveforms Square waveforms
Saw tooth waveforms All of these
The Q-meter works on the principle ofa)
Parallel resonance
Series resonance
Both and
Neither series resonance nor parallel resonance.
Which term applies to the maintenance of a given signal level until
the next sampling?
Aliasing Holding
Shannon frequency sampling Stair-stepping
Isolation amplifier actually operates on the principle ofa)
Attenuation Filtering Clipping Amplification
Page 1 of 2
State True or False: 06
Passive transducer is based on principle of energy conversion.
LVDT is a non-linear transducer.
Thermistor has negative coefficient of temperature.
Negative feedback in amplifiers improves the stability.
Piezoelectric transducer can measure static pressure.
AC bridges are used for the measurement of inductance and
capacitance
Q.2 Write a short note on the following:
Velocity transducer 05
I to V converter 05
Features of Digital Multimeter 04
Q.3 What is meant by transducer? Give the factors to be considered for
selecting a transducer.
06
Discuss the transducer for the measurement of- 08
Furnace temperature
Linear displacement
Q.4 State and brief out the desirable characteristics of Isolation Amplifier. 06
What are the advantages and disadvantages of LVDT? Explain the
principle of operation and working of LVDT with a suitable diagram.
08
Q.5 Explain the peak detector circuit. Where it is used? 06
Explain with the circuit diagrams the log and antilog amplifiers 08
Q.6 Give a brief account of a digital frequency Meter 06
Explain in brief the Hall effect. 08
Q.7 State and explain the working principle of any TWO of the following:
Techometer 07
RMS Converter 07
Proximity Detector 07