University of Mumbai 2008-3rd Sem B.E Electrical and Electronics Engineering Basic Electronics - Question Paper
Basic Electronics Sem III May 2008
S*' Cl/ejCtJ JTT CtitO 0
t
Allsfag , VL-
Con. 2744-08.
Total Marks: 100
N.B. (]) Question No. 1 is compulsory. (2) Solve any four questions from remaining six questions.
(3) Assume suitable data wherever required.
I. a. When a pn-junction is forward biased, ihe barrier potential is wiped off, why? 04
b. Difference between BJT und FET 04
c. For the circuit of fig. determine the range of V( that will maintain VL ut 8 V and 04 not exceed the maximum power rating of the Zcner diode.
A&v
V.*
I
>BV *
9in P=400mW
Rt
0 22WJ
|
d. Sketch V0 for the network of fig. for the input shown. |
 |
04
io Kn M\-
T
Vo
3: 4
5.3 V/T
1 Vi
I
7.3 V
c. Define operating point of transistor. Whai do you understand by stabilization of 04 operating point?
Con. 2744-C09520-08. 2 2, / / 5}o
2. b. Draw the circuit diagram of a capacitor filter with FWR. Derive the expression 10 for ripple factor for such a circuit?
b. For the circuit shown in fig. determine 10
1, dx. output voltage 2. Rectification efficiency
3, piv 4. Output frequency.
t~V
uov
UHl
J
IO
10
|
1-W-1 | |
|
i |
k |
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3. a. Explain different types of biasing techniques used for BJT in detail,
b. For the circuit shown* determine the Ioqi lct> Vcep and Sico*
16V
4. Design a single stage CE amplifier to meet following specifkalions:-|AVI>100, S-10, fL=20Hz, Use Transistor parameters as hFEshfc220, h=2.51d2 neglect h,e and hoc*
20
10
10
08
12
5. a. Explain Hall effect and derive the equation for hall coefficient.
b. What is polarteatiim? Explain the types of polarization in details.
6. a. Give the methods used for biasing the JFET with operating point values.
b. Design a single Stage CS amplifier for audio frequency range using JFET for the voltage gain of 12. Use JFET parameters as Ids$~7itiA, Vp=-2.5V, griK,35600|imho, rd=50k0.
7. Write notes on
1) Types of capacitors
2) Difference between series and shunt regulator.
3) Solar cell and its applications.
20
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Attachment: |
| Earning: Approval pending. |
