Download AKTU B-Tech 1st Sem 2015-2016 EC 101 Electronics Engineering Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU)) B-Tech 1st Semester (First Semester) 2015-2016 EC 101 Electronics Engineering Question Paper

Printed Pages : 7 . 1258 EC-101
(Following Paper ID and Roll No. to be filled' 1n your
Answer Book)
Roll No. ?
B.TECH.
(SEM. 1) THEORY EXAMINATION, 2015-16
ELECTRONICS ENGINEERING
[Time:3 hours] {Total Marks:100]
Note:AIl sections are compulsory. '_
1800
SECTION-A
Attempt all 'parts All parts can'y equal marks. Write answer
of all part in short . ? (2x10;20)
.(a) What is the purpose Of Delay block in CRO?
(b) De?ne slew rate of an OPAMP.
(Q) Why Si. is preferred ov?r Ge for manufacturing of
electronic devices. ?
(d) In JFET IDSS_ 6mA VP =-3V biased at V0 S=~2V.
. * Determine the value of g ?
(6) De?ne Op- -Amp and Draw its block diagram.
I (1) ? P.T.O.

(1) Explain Common Collector con?guration in case
OfNPN transistor. ? ' (ii) For the network of Figure 2, determine the range
. (g) Explain ohmic region ofthe JFET. ' of Vi that will maintain VL at 20 V without exceeding
? ? the maximum current rating of 60 mA.
(h) What do you understand by ?cut?in? voltage of a
diode?
. . . . . . . a
(l) thferenttate between determmlsttc and random T \M h. 5
4- mg V1 (
signals. ' ? V- . +
. t I hgum $1
(j) De?ne need of unity gain ampli?er using an ' +-
OpAmp. _ t '5 '
? SECTION-B
Figure 2
Attempt any ?ve questions from this section.(10x5=50)
2. (i) Detennin V0, and draw the outputwaveform ofthe ?t ' 3_ (i)
Determ' V ' '
given network ofFigure 1 . ? i me 0 end ID for the network of Flgure 3. ,
?V
1800 ' (2) V _ EC-101
1800 (3)
P.T.O. '

1800
(ii) Sketch V0 for the network of Figure 4 for the input
shown.
H0.
For the voltage divider con?guration ofFigure 5 determine
rc,AV,Zin and 20. ?
Figure 4
EC-lOl
1800
Explain the following with the help of necessay diagrams
using an Op-Amp.
(i) Adder
(ii) Integrator
(i) Enumerate with the help of a block diagram, ofvarious
elements involved in Digital Multimeter to measure
the various range of Voltage and Current.
(ii) Explain Differential ampli?er in two mode of
operation.
(i) Determine the output voltage of an op-amp for input
voltages ofVil=100V and Vi2=120V. The ampli?er has
a differential gain of A d:4000 and the value ofCMRR
15:
(a) 150 (b) 103
(ii) Find V0 for the circuit shown in Figure 6
zoom '
?M
stzv
yI-l V
(5) p.10.

8. With the help of a neat block diagram, explain the working
ofa CRO and describe the method of measurement of phase
and frequency using CRO.
9. Explain with the help of a neat diagram working and
characteristic curve of Ramp type digital voltmeter.
?SEC'I?ION-C
(15x2=30)
Attempt any two questions from this section.
Explain the workihg and characteristic ofTunnel diode
with the help of a neat diagram.
10. (i)
(ii) Describe with the help of circuit diagram, working of
avoltage multiplier. ?
Explain construction working and characteristics
of P-channel Enhacement type MOSFET.
11. (i)
- (ii) Draw and explairt the input and output characteristics.
1800 (6) EC-101
For the common collector con?guration in Figure 7,
determine 1?, Iv Vt, V03.
12. (i)
61 OK
51 OK
4 Figure 7 _
(ii) Determine Zi, Zn and Av for the circuit of Figure 8. if '
IDSS=12mA, Vp=-6V, and Yo=40 microSiemen.
1800 ' ~ ? (7)