Electronic Instrumentation - Jun 2014

Electronics & Communication (Semester 3)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) Explain with a neat block diagram of TRUE RMS voltmeters.(10 marks) 1 (b) Convert a basic D'Arsonval movement with an internal resistance of 50Ω and a full scale deflection current of 2mA into a multi range DC voltmeter with voltage range of 0-10V, 0-50V, 0-100V and 0-250V. Connect the multiplier resistance in series with D'Arsonval movement.(10 marks) 2 (a) With a neat block diagram, explain the successive approximation DVM.(10 marks) 2 (b) With a neat block diagram, explain the digital frequency meter.(10 marks) 3 (a) With a neat block diagram, explain the general purpose CRO.(10 marks) 3 (b) With a neat block diagram, explain the typical CRT connections.(10 marks) 4 (a) With a neat block diagram, explain the digital storage oscilloscope.(10 marks) 4 (b) With a neat block diagram, explain the sampling oscilloscope.(10 marks) 5 (a) With a neat block diagram, explain the working principle of pulse generator.(10 marks) 5 (b) With a neat block diagram, explain the working principle of function generator.(10 marks) 6 (a) With a neat block diagram, explain the Wien's bridge to measure the frequency.(10 marks) 6 (b) With a neat block diagram, explain the Wagner's earth connections.(10 marks) 7 (a) Explain the construction and working of LVDT.(10 marks) 7 (b) Explain the construction and working thermistor, what are the salient features of it.(10 marks)

Explain the following with relevant sketch:

8 (a) Photo electric transducer.(7 marks) 8 (b) Piezo electro transducer.(6 marks) 8 (c) RTD.(7 marks)