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7/24/2019 Question Paper BE-104
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Total No. of Question: 5}{Total No. of printed Pages: 2
BE-104B.E. I Semester Examination, PUT 2014
INDORE INSTITUTE OF SCIENCE TEC!NO"O#$Basi% E&e%tri%a&
E&e%troni%s En'ineerin'
Time: Three HoursMaximum Marks: !Note:i" #ns$er %&e
'uestions. (n ea)h 'uestion part #* +* , is )ompulsor- and parthas
(nternal ,hoi)e.ii" #ll parts of ea)h 'uestion are to /e attempted
at one pla)e.iii" #ll 'uestions )arr- e'ual marks* out of $hi)h
part # and + 0Max. 5! $ords")arr- 2 marks* part , 0Max. 1!! $ords"
)arr- marks* part 0Max. 3!! $ords")arr- marks.i&" 4x)ept
numeri)al* eri&ation* esign and ra$ing et).
UNIT I
1. a.ra$ the 6( )hara)teristi)s of pra)ti)al and ideal
&oltage and )urrentsour)es. (. 7tate and 4xplain superposition
and The&enin8s Theorem $ith the help ofan 4xample.
%.4sta/lish the relationship /et$een phase and line &oltages
in a 6phasestar )onne)ted )ir)uit. ).. etermine the )urrent (9 in
the )ir)uit using The&enin8s theorem.
ORind the total )urrent through Rin the gi&en )ir)uit.
UNIT II
2.#ns$er the follo$ing $ith referen)e to single phase
transformer:a. ;ustif- $ith reason the 9 $inding al$a-s kept near
to the )ore. #nd iron loss is)onstant.(.ra$ pharos diagram of
single phase transformer for di
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%.eri&e the expression for emf e'uation in transformer.). #
single phase transformer has 3!! primar- and 1!!! se)ondar- turns.
Thenet )ross se)tional area of the )ore is >! )m2. (f the
primar- $inding)onne)ted to 5! H? suppl- at 5!! * ,al)ulate0i" the
peak &alue of the @ux densit- in the )ore* 0ii" the &oltage
indu)ed in these)ondar- $inding.
OR4xplain open and short )ir)uit test of a single phase
transformer and gi&e theirsigni%)an)e.
UNIT III *. a e%ne: 7lip * s-n)hronous speed*
(. Ah- the single phase indu)tion motor is not self starting
%.e&elop the 4M e'uation for , ma)hine.
) ra$ the )onstru)tion of phase indu)tion ma)hine and
s-n)hronousma)hine.
OR
es)ri/e ,lassi%)ation of d) ma)hines and its appli)ations
UNIT I+ 4.a. ,on&ert the follo$ing.an / 0i" 012>"10 B 0 "
0ii" 0>.125" B 0 "10 0iii" 02" B 0 "2 0i&" 0+#"1>B 0 "2
0&"011"CB0 "1 0&i" 03."B0 "1>0&iii" 0#+"1>B 0 "10
(.Arite the s-m/ol and truth ta/le of all logi) gates. %. Ahat is
emorgan8s theorem = explain. ).ra$ the )ir)uit diagram for a half
adder. 4xplain it8s $orking $ith the helpof the true ta/le.
OR 4xplain the $orking of )ir)uit diagram of D67 and ;6E @ip
@op.=
UNIT +.a $hat do -ou understand /- intrinsi) and extrinsi)
semi)ondu)tor= (. ra$ 6( )hara)teristi)s of PN Fun)tion diode. %.
$hat do -ou understand /- transistor and its t-pes= ). ra$ and
explain input output )hara)teristi)s of ,+ ,, ,4 )on%guration=
OR4xplain:0i" +reakdo$n &oltage0ii" Enee &oltage0iii"
epletion la-er
LL THE BEST
Mid 7emester 4xamination6(ate: 1-r G1stsem
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7u/Fe)t: +4447u/Fe)t ,ode: +461!3Time: 2.!! hrs M#. M#DE7: 2!
M(N.
M#DE7:!Q616Write and Explain Kirchhoffs Laws . 2marksQ626 e%ne
Desistor *indu)tor and )apa)itor=2 marksQ6 6Explain the Source
Transformations with an example mark s Q636 State Superposition
theorem with a suitable example? marksQ656Determine the mesh
currents in the circuit shown in figure below
5 marks
Q6C6 ind the total resistan)e D* of the resistor ladder net$ork
sho$n in %gure/elo$:OR
5marksQ6 6 etermine the node &oltages in the )ir)uit sho$n
in %gure /elo$:
OR 5
marksQ6C etermine all mesh )urrent.
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