c) · 2020. 3. 23. · c) State Kirchoffs voltage and current laws. d) Mention star to delta conversion and delta to star conversion formula with proper diagram. Explain electrostatic

SPN NO.:

sT. xAVtER'S TECHNICAL INSTITUTE, MAHIM, MUMBAI 400016

DIPLOMA IN ETECTRONICS & TELECOMMUNICATION ENGINEERING

SEMESTER EXAMINATION - SUMMER 2017SEMESTER - I

Timeallowed:3hourF Marks - 80

lnstructions : -

1. Answer to the two sections must be written in separate Answer Book/s.

2. lllustrate your answers with neat sketches wherever necessary.

3. Use of Mathematical tables and Pocket calculators (non-programmable) is

permissible.

4. Figures to the right indicate full marks.

5. Assume suitable additional data, if necessary.:f ** rk*.i.** +**,a:k** r*,*:a .t * :t + * ** f* r*:t,!:i * +:F *:t + r**,** '*'**

Q. 1. Attempt any FOUR.

a) Define current voltage resistance and state its unit.

b) State ohm's law.

c) State Kirchoffs voltage and current laws.

d) Mention star to delta conversion and delta to star conversion formula with

proper diagram.

Explain electrostatic induction.

Define and mention the value and absolute permittivity and relative permittivity.

Q. 2. Attempt any TWO

a) State and explain voltage divider rule with diagram and state equation.

b) Explain Gauss Law.

c) State the Thevenin's Theorem and explain its analysis with an example.

Q. 3. Solve any TWO of the following :

a) Find current in 10o in the circuit given below'?- o -/t.-

16

e)

f)

L2

t2

*",fl*14,,'-b) Find current in 204 by KVL

\o-q tr.-r

lo-qc) Find the current in 25O by Superposition Theorem.

10v

Q.4. Attempt ani FOUR.

a) Explain the construction of a capacitor and list;the factors whichdefine capacitance of it.

b) What is an AC bridge and DC bridge, list theirtypes .

c) Which bridge network use for resistance measurement explain it with a

neat diagram.

d) State the Faraday's Law of electro magnetic induction.

e) Write a note on Dynamically induced emf.

f) List various parameters of magnetic field and explain any one of them.

Q.5. Attempt anyTWO.

a) Explain following terms and state its significance and its uniti) Capacitance

ii) Capacitive reactance

b) Give the comparison between electric and magnetic circuit.

c) Write a note on Maxwell induction bridge.

q. 6. Attempt any TWO

a) Write a note on :

i) BH Curve

ii) Hysteresis loop

b) Determine following parameters for the below given circuit.

i) total capacitance (ii) charge on capacitor

(where C1, C2, C3, C4, C5, C6, C7, C8 are lpf)

c) Draw the circuit diagram and explain the operation of Schering Bridge.

16

L2

t2

:t ri :* ri :l :l :t + :i :1.:F :1. rt + :t rF ,F ,a :F

ET-15113/Er-11113/Er-1O3BL-27 A77

SPN NO.:

ST. XAVIER,S TECHNICAL INSTITUTE, MAHIM, MUMBAI 400016DIPLOMA IN ELECTRONICS & TETECOMMUNICATION ENGINEER!NG

SrursreR ExAMtNATIoN - SUMMER 2o1zSEMESTER - II

Timeallowed:3hours Marks - 80

lnstructions : -

1. Answer to the two sections must be written in separate Answer Book/s.

2. lllustrate your answers with neat sketches wherever neceisary.

3. Use of Mathematical tables and Pocket calculators (non-programmable) is

permissible.

4. Figures to the right indicate full marks.

5. Assume suitable additional data, if necessary.***:* f :tt* ****:F,f *:f *** **+**:i:tri* 't.*

,i r*,t.*.* * 't****:**,t

.:1 .''a:,

Q. 1. Attempt any FOUR.

a) Find fl if siny - Ios @ +y)' tlr ' '

L6

bl Evaluate Ltry

c) tty - f(x) -d)

e)

f)

xB -32

#, show that f (y) = x

x7 -az9

Logx-Io92x-2

,lT+x -,1T4tvaluate ,lm -:--:-x+0 x

Differentiate sin-1 (cosr) w.r.t. rrind4l if v = tan-1 fl-cosr)dt ' \ sinr,/

Q. 2. Attempt any TWO.'

al lt x2 + y2 - 4xy, tindf2xL 2-z_ zb) Evatuate t%'- "--

cl tf f (x) = L , show that f{f V@)l} = x

Q. 3. Attempt any TWO.

a) Differentiate i! = e2' + xx +2x w.r.t. x

b) tt y - "rasiz-1r, show that (1 - x'z) jj - xff- mzy :

L2

Ltmx-2c) Evaluate :

t2

Q.4. Attempt any FOUR.

a) Find the maximum and minimum values of

!=x3-9x2+24x

16

b)

c)

Find the modflus and amplitude "f g1#A)

Find the values of a,b,c,d

forwhich l: "rll: 'rl= [; '.]

dt ,t A = l, i 3], *n., wo" "t mat ixis 42 - 4A?

e) Find the mode of the following distribution

f) Following are the mark of 10 students. Find the mode and median :

2s, 15, 23, 27, 14, 25, 23, 23, 2s, 22

Q. 5. Attempt any TWO

a) Find the point on the curve y = x2 - 6x * 8, where the tangent is

parallel to the X-axis.

b) Find the inverse ofthe matrix

rt23llz + 5l uy najoint Method.hs6l

c) Solve the following equations by Adjoint - lnverse method of matrices i3x+2Y =74x +3y - l0

Q. 6. Attempt any TWO.

a) Simplify using De Moive/s theorem :

(cos39 Iistn3?)a (cos49 -isin4?)s

b) Find the mode graphically by plotting a histogram

x 0-10 LO-20 20-30 30-40 40-50

f 12 15 17 9

c) Find the median graphically by plotting an ogive forthe following distribution

Expenditure @s) 0-10 LO-20 20-30 30-40 40-50

No. of machines T4 23 27 2l 15

t2

12 \-

ET - !527v tT -rlzt! EV - 7O3-O2M t7

X 0-10 LO-20 20-30 30-40 40-50 50-60 60-70 70-80

f 5 8 7 T2 28 20 10 10

:* ri***.t** **** *** ** *:t +

ST. XAVIER'S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016

ITiGGLTI pro*r, ,oossgsr, ,oosossg, ,oosrger, zq+eogsg

1J The answers should be examined by key words and not as word-to-word as given in themodel answer scheme.

2) The model answer and the answer written by candidate may vary but the examiner may tryto assess the understanding level ofthe candidate.

3) The language errors such as grammatical, spelling errors should not be given moreImportance [Not applicable for subject English and Communication Skills.

4) While assessing figures, examiner may give credit for principal components indicated in thefigure. The figures drawn by candidate and model answer niay vary. The examiner may givecredit for any equivalent figure drawn.

5) Credits may be given step wise for numerical probiems. In some cases, the assumed constantvalues ma\'' \rar\/ and there mav be some difference in the candidate's answers and modela n s\\:e r.

6) In case of some questions credit may be given by judgement on part of examiner of relevantanswer based on candidate's understanding.

7J F'or programming language papers, credit may be given to any other program based onequivalent concept.

o

:

l-

\i

ConfidentialAUTONOMOUS EXAMTNATTON - SUMMER / WTNTER - 20

Pragramme: DETE SEMESTER: flCourse Code: e f l< 2 )l lCourse Name: 13.* * , fl\^tLTime Allowed: 3 hours Maximum fub}rc, BT-'

Serial No.

of QuestionModel Answers Marks

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@, ST. XAVIER'S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016

PH O N E : 24455937 ; 24454559 ; 2445L96L; 2446O359

Serial No.


dy f /orn \A /r- +,.r'\ # l-1 I

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ST. XAVIER,S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016

P H O N E : 24455937 ; 24454559 ; 2445L9 6L; 2446O359

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( l-+ z)- ( t -^ A+4(e--b)=

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@ ST. XAVIER,S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016

P H O N E : 24455937 ; 2445 4559 ; 2445L9 6t; 2446O359

Serial No.


u0 z'/ ?

r)A /NU 2_

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dq t \r> 2-) - ,u G?^.- -C11d.\ U

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P H O N E : 24455937 ; 2445 4559 ; 2445 t9 6L; 2446O359

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-l

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t

(r)

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@ffi ST. XAVIER,S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016

P H O N E : 24455937 ; 2445 4559 ; 2445L9 6L; 24460359

Model Answers

dy

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P H O N E : 24455937 ; 2445 4559 ; 2445!9 6t; 24460359

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d.l I <. '_t- *''( 14 Lc-f 'n

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l-zL J

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P H O N E : 24455937 ; 2445 4559 ; 2445 t9 6L; 24460359

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P H O N E : 24455937 ; 2445 4559 ; 2445t9 6t; 2446O359

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Model Answers S..h*. - It3A1

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z- 6^ -

-zaV ^'. ^ l- e4 ivl.a-

-lP = 2Q-lR=

A. r"^-i ^; iM\.lrr.,* 4,t-

ST. XAVIER,S TECHNICAL INSTITUTTMAHIM CAUSEWAY, MUMBAI 4OO 016

P H O N E : 24455937 ; 2445 4559 ; 2445 L9 6L; 24460359

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Serial No.


r- *7l, i'- I vrn t^.ryta- \,1 a.) ),-\rr .n\ L5- Q,w z\ 1-2>4*.c'

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l,6o-lqqIr

i . -Tf,. b.l ^7- 6l v* i)..l I

(_)

flr L.* z-- ,+r '\ 1z+i )5-(

f,+ 2 + e, r-i. oi- z +3i-l ')

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y'-rLoi * / t () i- tl_

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lsn +t{C! qb*qa flo-1 )e a-+ qL 2 Lt12'cl C)t

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9,c + \c = O zu +3d =

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P H O N E : 24455937 ; 2445 4559 ; 2445 t9 6t; 2446O359

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Model Answers

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a =-3x-{ '"

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L

Xr)-re-^ D.+( Zz.,>1 (t 14 xr) +(e x4 ( I ^4,

x>\+f 2x t-) ( zx') t ( lxrzxr)+ (l r u 2x

Serial No.


l-t,+ a+ t. 2- +2+ t, 2--i_\42 -l(

2-+2=t\ 4+l+Q 4+2-+z-2-+ Lt+ z- L, .+ 2-t.L L +4t t U

q I .qfa-q.* )-l

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ST. XAVIER'S TECHNICAL INSTITUTE @MAHIM CAUSEWAY, MUMBAI 4OO 016

P H O N E : 24455937 ; 2445 4559 ; 2445L9 6t; 2445O359

Model Answers

t

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2€-lLz(Le )- lL- zo

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@ffi ST. XAVIER,S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016

P H O N E : 24455937 ; 24454559 ; 2445t9 5L; 2446O359

Serial No.

of Question

N=IC) Model Answers Marks

*4,..t ia.-, - i N \ r-6 crbs.n. Jto-'r - &r-,'\ ltA\2) Vz ''./

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3 -rt l*l

lAl = I L32-4 q s1 -zlL r +312- 4

5 f { 5 € I 13 € 3r

=. r e r*z-s) - -(r 2-*\t) + 3(rc" -r

(g

-fc9

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PH O N E : 24455937 ; 24454559 ; 2445L96L; 2446O359

Model Answers

Q,n c,tt l ,

= - i 7-3 =

r+s- a_11

= -lr<4 :;

@ ST. XAVIER'S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO 016

P H O N E : 24455937 ; 2445 4559 ; 2445L9 6L; 2446O359

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Serial No.


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rr tt .^rtt r-rf+tn 3 = ?

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ST. XAVIER,S TECHNICAL INSTITUTEMAHIM CAUSEWAY, MUMBAI 4OO O1-6

P H O N E : 24455937 ; 2445 4559 ; 2445t96L; 2446O359

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Model Answers

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P H O N E : 24455937 ; 2445 4559 ; 2445 19 6t; 2446O359

Model Answers

3o qo go 6o

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M.J".o.- = 25-

Documents

c) · 2020. 3. 23. · c) State Kirchoffs voltage and current laws. d) Mention star to delta conversion and delta to star conversion formula with proper diagram. Explain electrostatic