Engineering BE Electronics and Computer Science Sem 3 December 2018 2018 Electronics Instruments And Measurements Question Paper - Mumbai University | munotes
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Semester-end · December 2018
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Questions asked in this paper
- Figures to the right indicate full marks & every sub-question from Q.2 to Q.6 has
-
Q1 ATTEMPT ANY FOUR (04) :
- (a) Define the following dynamic characteristics of instruments & mention for which types of measurements they have to be considered?
- (1) Speed of Response
- (11) Lag
- (b) Draw a neat circuit diagram of LCR — Q meter & explain its operating
- (c) Explain the function of delay line in cathode ray oscilloscope (CRO) with
- (d) Describe operating principle of heterodyne wave analyzer with a neat
- (e) With a neat diagram, explain the principle of digital time measurement
- (f) Describe in brief, the classification types of transducers
-
Q2 (a) The true value of the voltage across a resistor in a circuit is 10 V when it is calculated by mathematical analysis. Measuring the same voltage by six different random individuals (but all with the same digital multimeter) gives the following results as shown :
- (i) Calculate the percentage error for the fourth observation Paper Subject Code: 51305 Electronics Instruments and Measurements
- (ii) Calculate the accuracy for the second observation
- (iii) Determine the precision of the fifth observation
- (iv) Calculate the standard deviation (o) for the above observations
- (v) Calculate the average deviation (davg) for the above observations
- (b) Draw a neat labeled circuit diagram of Wien Bridge & derive the mathematical expression for the unknown AC source frequency
-
Q3 (a) Explain the basic cathode ray oscilloscope (CRO) with neat labeled block diagram & describe all its individual sections briefly
- (b) Explain how Lissajous patterns figures are used for measurement of an 20 unknown frequency & phase shift using a cathode ray oscilloscope (CRO) with
-
Q4 (a) With neat labeled block diagram, describe the construction & operation of a ramp type digital voltmeter (DVM) with appropriate waveforms
- (b) With neat labeled block diagram, describe the spectrum analyzer
-
Q5 (a) Write note on the linear variable differential transformer (LVDT) with reference to its construction, operation mentioning its applications. 0
- (b) Explain the ultrasonic level measurement transducer with a neat block diagram with respect to construction & operation
-
Q6 (a) Describe the rotameter transducer for the measurement of flow with a neat diagram. What are its advantages & disadvantages ?
- (b) How. are thermistors (thermally sensitive resistors) different from the resistance temperature detectors (RTD) although both of them use same operating principle of converting temperature variations (AT) into resistance variations (AR) ? Describe construction, operation, characteristics & applications of thermistors with neat sketch wherever necessary
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