Download DBATU B-Tech 1st Year 2018 May Basic Electronic Engineering 2 Question Paper

Download DBATU (Dr. Babasaheb Ambedkar Technological University) B.Tech First Year 2018 May Basic Electronic Engineering 2 Question Paper

DR. BABASAHEB AMBEDKAR TECHNOLOGICAL UNIVERSITY,
LONERE? RAIGAD? 402 103 ' *
Summer Semester Examination, May 2018
Branch: B. Tech. Semester II
Subject with Subject Code: Basic Electronics Engineering .7' . Marks 60
[EXE205] _. ?- V. . x
Date: 23 / 05 / 2018 i 7 / 1 Time.- 3 Hrs-
Instructions to the Students:
1 Each question canies 12 marks.
2 Attempt any ?ve questions of the following. -
3. Illustrate your answers with neat sketches,d1agram eta, whereVer necessary
4. If some part or parameter is noticed to be 111issi11g, you 111ay appropriately assume it and should
mention it clearly. ? _ ? . -
5. Use ofnon-programmable calculatqrs 153 allowed \ .. / ?L
Q.1. A] Describe essential features of the followmg bonds f l. _ V: _ 04
(a) Ionic bond ' " - ~, _ -
B] -th-:fmafepi515?eience point of View. 04
C] DifferehC'e,:.berveen.it?fyi5eendpkypexserhieendiictors. o4
Q.2. ? A]_:?f__Discuss the concept ofHole - ' 04
B]: The resmtmty 0f Cu is 1.72 X 10 8 ohm- 1n.Ca1cu1ate the mobility of 04
. electrons in' Cu GiVen that the number of electrons per unit volume is
10.41 X 1028/1113; ? '
y l ? JC?] Fermi energy for SIIVCI is 5 5 eV. Find out the energy for Which the 04
? probability 0f occupancy at 300 K 18 0.9.
Q3 1 ' i . Atterript ariyythree (if the followings
,- A], ..Exp1;e1ii1.?the:?t?tic ahd dynamic resisfance of a p?n junction diode. 04
I I 5 \ B] Explain the .V'vorking piiheiple of a voltage doubler circuit. 04
C] II Vlrpp 18 I0 V and Vdc IS 300 V F 1nd ripple fact01 (% ripple r) 04
, . g.gmte 0f)
0/? \n ??
HVULOEI?I'JJVJDI?JUJIOAD?I'IL?UJJJUJDUJU .Q 2
5 LIBRARY :1
? 18?
715? ?
. hhi I?B .

D]
.B]
C]
A]
B]
Distinguish between avalanche and zener mechanism.
Explain the concept of base?width modulation.
Design a ?xed bias circuit with R5 using silichohh transistor having hFE
= 100, Vcc is 12 V and dc bias conditions are VCE = 6V, Ic = 3mA. V35
= 0.7V.
Discuss the procedure of testing a?
unknown.
Attempt any two of the followings
inductance.
A Coil has a resistanc
very low frequene
percentage Chang
frequency of 10001312
06
06
06
04
04
04
3mm I buauuaouau