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Basic Electronics Engineering (BXE)* Question Paper - May 18 - First Year Engineering (Semester 1) - Pune University (PU)
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Basic Electronics Engineering (BXE)* - May 18
First Year Engineering (Semester 1)
Total marks: 50
Total time: 2 Hours
INSTRUCTIONS
(1) Figure to the right indicate full marks.
(2) Neat diagrams must be necessary whenever necessary.
(3) Assume suitable data if necessary.
1.a.
Define rectifier circuit and mention its types. Draw and explain any one with waveforms.
(6 marks)
00
1.b.
Draw a circuit diagram of CE amplifier. State the function of each component.
(6 marks)
00
OR
2.a.
Explain the construction of Enhancement type N-channel MOSFET.
(6 marks)
00
2.b.
Draw and explain voltage multiplier circuit.
(6 marks)
00
3.a.
Find output voltage of an Op-amp circuit shown in fig. Below,
(6 marks)
00
3.b.
Draw 2 input Ex-OR gate , write logic equation and implement using basic logic gates.
(6 marks)
00
OR
4.a
Draw and explain circuit diagram of astable multivibrator using IC 555. Write equation for frequency of oscillation.
(6 marks)
00
4.b.
Draw block diagram of microprocessor and microcontroller.
(6 marks)
00
5.a.
Draw and explain block diagram of Digital thermometer. Mention two application.
(7 marks)
00
5.b.
Compare active and passive transducer.
(6 marks)
00
OR
6.a.
Explain in detail :
(7 marks)
00
i) Construction if DIAC
ii) characteristics of DIAC.
iii) Modes of operation.
6.b.
Explain in detail , the selection criteria for transducer.
(6 marks)
00
7.a.
Explain the elements of communication system with the help of block diagram.
(7 marks)
00
7.b.
Write a note on co-axial cable and optical fibre cable with neat structural diagram.
(6 marks)
00
OR
8.a.
Explain the basic structure of mobile phone system.
(6 marks)
00
8.b.
A Carrier signal 20sin(2π x 104t) is used to modulating signal 10sin(2π x 103t). Determine the modulation index fir the modulated wave and draw the frequency spectrum for AM wave.
(7 marks)
00
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