Electronic Instruments and Measurements - Dec 2015

Electronics & Telecomm. (Semester 3)

TOTAL MARKS: 80
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Assume data if required.
(4) Figures to the right indicate full marks.

Attempt any four:

1 (a) Significance of four and half digit display.(5 marks) 1 (b) Discuss megger for measurement of very high resistance.(5 marks) 1 (c) Explain working of strain gauge and its application in load measurement.(5 marks) 1 (d) Explain working of thermocouple and mention its range.(5 marks) 1 (e) Explain error in measurement and methods of error minimization.(5 marks) 1 (f) A galvanometer with a 1 mA full scale deflection and an internal resistance of 500 Ω is to be used as voltmeter, find series resistance for 1 and 10 v ranges.(5 marks) 2 (a) Draw and explain working of capacitive transducer for level measurement.(10 marks) 2 (b) Draw neat block diagram of CRO and explain its functioning comment on role of delay line in CRO.(10 marks) 3 (a) Discuss DSO with the help of block diagram along with various modes of operation also explain its applications.(10 marks) 3 (b) Explain LVDT and define its application in displacement measurement.(10 marks) 4 (a) Explain Heterodyne type waves analyser and its applications.(10 marks) 4 (b) Draw and explain Weighted resistor type DAC for 3 bits input taking suitable example.(10 marks) 5 (a) Draw and explain Schering bridge and derive expression for measurement of capacitance.(10 marks) 5 (b) Define power and energy and explain working of a single phase energy meter.(10 marks) 6 (a) Draw ad explain Wheatstone bridge and derive expression for measurement of resistance.(10 marks) 6 (b) Explain flash type 3 bit ADC with the help of block diagram and comment on its speed.(10 marks)