Download PTU B-Tech ME 2020 Dec 3rd Sem 76420 Basic Electronics Engineering Question Paper

Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) Mechanical Engineering 2020 December 3rd Sem 76420 Basic Electronics Engineering Previous Question Paper

Roll No.
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech. (ME) (2018 Batch) (Sem.?3)
BASIC ELECTRONICS ENGINEERING
Subject Code : BTEC305-18
M.Code : 76420
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Write briefly :
1.
Differentiate between intrinsic and extrinsic semiconductors.
2.
Draw the reverse bias characteristics of a p-n junction.
3.
What do you mean by breakdown diode?
4.
Why CE configuration is widely used in amplifier circuits?
5.
What is adder or summing amplifier?
6.
What do you mean by stabilization?
7.
Why the input terminals of an op-amp are named as inverting input and non-inverting
input?
8.
Convert (7D2.1A)16 to its decimal equivalent.
9.
Which gates are called used as universal gates and why?
10. Convert (101010.10)2 to octal.
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SECTION-B
11. Explain the phenomenon of formation of depletion layer in the p-n junction.
12. A single phase full-wave rectifier uses two diodes, the internal resistance of each being
20. The transformer rms secondary voltage from center tap to each end of secondary is
50 V and load resistance is 980. Find :
a) The mean load current
b) Rms load current
c) Output efficiency
13. The emitter current IE in a transistor is 3 mA. If the leakage current ICBO is 5A and
= 0.95. Calculate the collector and base current.
14. Draw the block diagram of internal construction of op-amp and explain the function of
each block in detail.
15. Minimize the following using K-map :
f(A,B,C,D) = m(0,2,4,6,8,10,12,14)
SECTION-C
16. a) Simplify the following Boolean equation and realize the same using a combination of
AND, OR, NOR gates :
Y ( A B)( A C)(B C)
b) Explain the construction and working of RS-flip flop.
17. a) Show that using Boolean algebra and De Morgan's theorems :
Y Z W X Z W XY Z WY Z Z
b) Explain the working of inverting summer amplifier.
18. Write short notes on any two :
a) Differentiator
b) Voltage divider bias circuit
c) Photo diode
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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