Electronic Instruments and Measurements - Dec 2014

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 five:

1 (a) Why wave analyzer is known as frequency selective voltmeter?(4 marks) 1 (b) Define accuracy, precision and sensitivity with suitable example.(4 marks) 1 (c) General specifications of Digital Multi-meter.(4 marks) 1 (d) List various sensors for pressure and temperature along with their ranges.(4 marks) 1 (e) List name of bridges for RLC measurement with proper classification.(4 marks) 1 (f) Significance of three and half digit display.(4 marks) 2 (a) Explain working of strain guage and draw the expression for guage factor.(10 marks) 2 (b) Draw neat block diagram of CRO and explain its functioning, comment on role of sweep in CRO.(10 marks) 3 (a) Draw and explain Weighted resistor network type DAC for 3 bits input taking suitable example.(10 marks) 3 (b) Explain Kevin's double bridge and its application in very low resistance measurement.(10 marks) 4 (a) Explain dual slop integration type ADC with the help of block diagram and comment on its speed.(10 marks) 4 (b) Explain LVDT and define its application in displacement measurement.(10 marks) 5 (a) Explain Heterodyne type wave analyzer and its applications.(10 marks) 5 (b) Discuss DSO with the help of block diagram along with various modes of operation. Also explain its applications.(10 marks) 6 (a) Draw and discuss Maxwell Bridge and its application for measurement of inductance.(10 marks) 6 (b) Define Q factor and explain working of a Q meter for Q factor measurement.(10 marks)