Question Paper: Basic Electronics Engineering (BXE) : Question Paper May 2014 - First Year Engineering (Semester 2) | Pune University (PU)

Basic Electronics Engineering (BXE) - May 2014

First Year Engineering (Semester 2)

(1) Solve Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6, Q.7 or Q.8
(2) Assume suitable data, if necessary.

Answer any one question from Q1 & Q2

1 (a) Explain Voltage tripler and quadrupler circuit.(6 marks) 1 (b) Explain input output characteristics of CE amplifier.(6 marks) 2 (a) Explain working principle of photo diode with characteristics. Why photodiode is operated in reverse biased mode when used as a optical detector.(6 marks) 2 (b) Explain Drain Characteristics of an n-channel enhancement type MOSFET.(6 marks)

Answer any one question from Q3 & Q4

3 (a) Draw the circuit diagram and write the output equation for
i) Inverting summer with three inputs
ii) Ideal differentiator.
(6 marks)
3 (b) Explain the operation of Multiplexer and Demultiplexer(6 marks) 4 (a) Draw three pin IC voltage regulator. Define load and Line regulation.(6 marks) 4 (b) Implement the following with minimum number of NAND gates.
i) y=AD+CB
ii) z=A(B+CD)
(6 marks)

Answer any one question from Q5 & Q6

5 (a) Explain with block diagram Digital Thermometer.(7 marks) 5 (b) Explain construction of SCR.(6 marks) 6 (a) Explain various criteria used to select a transducer.(7 marks) 6 (b) Explain Characteristics of DIAC.(6 marks)

Answer any one question from Q7 & Q8

7 (a) Give advantages, disadvantages and applications of Co-axial cable.(6 marks) 7 (b) Explain the block diagram of GSM system.(7 marks) 8 (a) Define Modulation index with reference to AM and FM. Draw AM waveform for overmodulation case.(6 marks) 8 (b) Write a note on Optical Fiber and explain how light travels through a fiber.(7 marks)

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