B.Sc-B.Sc Electronics 1st Sem EL1 - T1 - Principles of Analog Electronics(University of Pune, Pune-2013)
F.Y. B.Sc.
SEAT No. :
[Total No. of Pages : 3
ELECTRONIC SCIENCE
EL1 - T1 - Principles of Analog Electronics
(2008 Pattern) (Paper - I)
Time : 3 Hours] [Max. Marks : 80
Instructions to the candidates:
1) All questions are compulsory.
2) Draw neat labelled diagrams and symbols wherever necessary.
3) Use of logarithmic table & calculator is allowed.
4) Figures to the right indicate full marks.
Q1) Answer the following questions in brief :
a) Define :
i) Self inductance
ii) Mutual inductance
b) Draw circuit symbols of :
i) LDR ii) Preset
c) State two important specifications for capacitor?
d) Define ideal voltage and ideal current sources?
e) State Thevenin’s network theorem.
f) Draw I - V characteristics of :
i) Zener diode
ii) Switching diode
g) Define :
i) Ripple factor
ii) Peak inverse voltage
h) State any two applications of OPAMP.
Q2) Answer any Four of the following.
a) Write two important specifications of :
i) Switch &
ii) Fuse
b) Which are different types of signals used in Electronics? What are
parameters of symmetric square waves?
P.T.O.
c) Explain series LCR circuit? Obtain expression for resonance frequency Fr?
d) What is an opto coupler explain its working?
e) Explain in brief full wave voltage doubler circuit?
f) The arms of ‘T’ network has R1 = 4 ohm, R2 = 5 ohm, and R3 = 6 ohm
convert it into equivalent ‘p’ network.
Q3) Answer the following questions. (any Four) [16]
a) Explain in brief :
i) Types of PCBS &
ii) A standard cell?
b) Explain frequency response of low pass RC passive filter.
c) Draw an output I - V characteristics of BJT in CE mode.
Define :
- b current gain of BJT &
ii) Dynamic resistance.
d) Write comparison between photodiode and LED.
e) Draw block diagram of an amplifier? Define voltage gain and current
gain.
f) Verify the maximum power transfer theorem for the adjoining circuit.
RL1 = 12 ohm, RL2 = 20 ohm and
R L3 = 48 ohm
Q4) Answer any Four of the following : [16]
a) Explain in brief working of RC differentiator circuit?
b) Draw diagram of :
i) General purpose electromagnetic relay and
ii) Co - axial cable.
c) Explain construction of P - channel JFET?
d) Explain working of half wave rectifier circuit and draw corresponding
input and output waveforms?
[4317]-21 2
e) Compare performance of CB and CE mode BJT?
f) Obtain the equivalent circuit using Norton’s theorem for the following
networks.
Q5) Answer any Four of the following. [16]
a) Draw construction, I - V characteristics and explain working of SCR in
brief?
b) What are different methods of biasing a transistor? Which method is
prominently used & why?
c) State :
i) Kirchhoff’s current and voltage laws?
ii) Super position theorem.
d) Explain use of OPAMP as inverting amplifier and obtain an expression
for its voltage gain?
e) Explain with the help of an equivalent circuit working of UJT? Draw its
I-V characteristics?
f) Obtain an expression for voltage across capacitor in RC circuit when a
step signal is applied at its input?
| Earning: Approval pending. |
