No. of Pr'x)ted I'ages : 15

tiililtililililtflilltltill

LrSlol 6r6i:.7

Ilegistel Nurnber

PART-III

|v(ur vn ejr$p stur6nfl66i

(n ) on$p$ p6ir6)LDurEp +Iuie#ls6ii

(b) paramagnetic io11s

(d) non-magnetic ions

2-o\g

30x1=30

-I .-)

Gp[Lb::o6irf1Time Allorved : 3 Hours l

el46,16d,q t

gdlr,.t '

Note :

7.

J-u ne-

ity',att=-t3- @5028

$u:frflueo / PHYSICS

(9,61$ Lorbgo +5,,r61ar er$ / Tamil & English Versions)

tp:q+...f"3c.* fgf; ge g e i =e e ffi? | 6 Lo ngp Lo g u 6 L, a,ns eir : 1s0

IMaximum Marks : 150

(1) g 6ir6irpg cr9ennriaqgLb eif u.lno u6!eurdl reirerpn er eiir L- p eo eor

erfl r nri $916 6lsneir6naq Lb. gs+Lr Lr$e5lerl gcop u9 gu Llileh eraoprisainsirarilr.:L-,l norrflu6 LL6irqurs$ Clprfl er9LiseqLo.

(2) S6LrLb eteueug orgLrq enLou9Jenrn Lor@GLo o119grolp!651r Lrurofir@$p

Gerain$ Lb. u rr.roeir er co qer g$ g 6 r einHci Lr u r 6inLr Oppq 6.

qt) Check the question paper for fairness of printing. II there is any lack of

iaimess, inform the Hall Supervisor imrnediateiv-

(2) Use Black or Blue inl to u,rile and pencil to draw diaglams.

ugltl-IIPART-l

(i) cx6o5n9gl o9lern6slggrigLb eS eo ru afl &s eq Lir.

r'' s- rrr-6i, orlla -cu -$ ;p pt pQU g a 3peu b.

(i) Ans\,,er all the questions.

(ii) Choose and $'rite the cofiect arswer.

Gro+f 6 rrqlonnolr Lrueirr@erg

(et)run an$g .gtuoflafr

(@) "".C1!G[r sn$g eruaflseir

N{aser material is :

(a) diamagrctic ions

(c) fenomagneiic ions

| 9OLrLl6 / l"um over

5028

2.

3.

2

GsgG5[G eq r,irbrr 6r.iJrL] 6nr

{,/ ;- '"'o eran + GD'r 6rr .,,J6ddera,(@) uleirgrrrLopp gl6dT BE6ID (n) qeop& o$lirsooonLr Gr neiirpeoeir'Ihe cathode lays ar. i

(a) a sheam of electrons (b) a stream of positive ions(c) a steam of unchar.gcd particles (d) same as canal rays

"'.Gr nanal r, 6olo666le6iJr Genpatenugairu rq gt Li q O6oD eoua$$ab goi ug eirdleosGor.s ir ,

{g)sr '61 616 'nLsiS6i, s 6. 61 6i-,e,661 +lgso a$;rigb(+)gru'iq rtrlg eorop$eb L6ir6n6op6filL lgeoperna $g6qqLb(Ai) eltrfq 619 eoro$pet L6ir6rTpEO +Loono @6dgLb('-t) alrireq LdlE errrs$$en Ldr6n6np65lL el$oLonaGorn 44elaugl

O6Dp6)rrocorr g(DdgLbAccordinB to Foucault and Michelson experiment the velo.ity of light in a rarer mediumis:(a) greater than in a denser medium(b) lesser than i11 a deiLser medium(c) equal to that in a d-.nser medium(d) either greater or lesser than in a denser medium

l. "vi'r"agtrc

a d uit gO +g)d6\-{i gaogrienen r5lerem. q

"./'8.P vet r+ 88 McV r!!/ 4ol MeVThe binding energv per nucleon of ,aFe56 nucleus is :

.(a) 8 8 A lev (b) 8E Mev (e) a93 MeV

5. GpLgGun L:rI-rL9uqeil zciron R-F 4leoeuauiileoe rlgolrBlgelgl :

(et I 6]Boflut;iirri 6n66nss6ir,/'€- i s S riG6l6rir ooi$ gerce#(@t) Clee6lul6uriii areaoo Lo$g Lir LUri. sr$liGleleiin eoi$i etooeuseir(") Cq-pp,q .+$nGerairi zeoru eeir$

=leoouseir'fhe R-F channel in a radio h.ansmittel oroduces :

(a) audio signalsr(r,. h:ql- req .Pa. . orre. \\orP-

borh rua'o .'l:I l.ro h.gh t-e.1u.rh) .d ,c. rad\e.(d) lorv frequeflc) carrier t^/aves

+pp6') :

( Fr,) 413 Mev

(d) 413 MeV

3

BO ClgrLi GS66oe6t *!$1d'r 9rri or[a#l :

t36T2r

(6) a:JLR

rtn'r=+Ji

iln

5028

6.

{er)O: } (€)a= *\iEQ {actor of sedes resonant cfucuit is :

G) a=+

(er) erorg @<noror

(gr/ir",,,c ,

(a) No unit(c) Nm2C 1

(.1) a:+(b) "

= iJ: (") a:

7. geirrileirglainr;b 6r6ridr 0.03 H Lo$u qeirrr ddr51rairrq or@Lb Seoedir{isrrurrAC &Edl6ir el$riGeuair 50 Hz eredci, dloing:ranrgu9ein dairiogLrq :

(er ) 3.14 () \ilg qz rt (61) 3o (r) 6.28 oI{ the frequency of AC ckcuit connected with an inductor oI inductance 0.03 H only is50 H7, rhpn mduclivp rea.la'r,. rs.(a) 3.14 O (b) e.42 o (c) 3 o (d) 6.28 O

8. 61en@rieurrL u[LrL] org!Gu 6eaiglLb r6ldn6$ 6rr,+ri Gsn@oofleirerainofld;ars u9 eiir glt6D(q [rtrg]?

(:t) Nc-1(r-r,) Nm

The unit oI d1e number of electric lines of force passing through a given area is :

&) NC1(d) Nm

9, rairGrfpLb Gefiuur@orpein grridu GpnrieLb:

(e) ClorerGerg c>r$)n6erl6llr Clanairr @19 sl6D€rr{E6d)61-f @taoem&s

ts% 1p4 Sl gta.o -9eir +o.eu erq ou$a p- 6rp

{Atg60p69 sr$ i'C1er air C)snamr paereoeu $ainu Gpnareueqsqgri;g$ $pLbL.lu€lgltru

( ) urjs, rj 6D.6r6nerl " Uor,.d6The mdn purpose o{ modulation is to :

(a) combine two waves of di{ferent frequencies

rb,,,quLe rar".rrpr.gof rhp.:ie- r.rre,r I rJr."a{ loh lrpouer.\ rnlor mrhor,rer long rll't'n, e. cifriie"L'1

(d) produce side bands

$me.#=EieEv?e6E"aE's$im | $lg;uqs / rurn over

5 028

1oil

11.

N ar6os (q6rip&6L!i$1u!lil reironenar :

(.ct ) 6l ur{i,a d "ir6!

r er$l idl ein er u oilseir

I+J elD Lrr.fiGnri e!trndlsGir -qrio,.-.8-. '^b;o Gp-06 ..6a6,( n ) dl d'rg1orerree,ir Gl r g Li r ndnaoLo eoi$lseirl-1 \,,. -.p .F ....or.1 , or.. trp-.. I

(a) imlrobile negatir..e ions(b) no mino ty cal.Iiers(c) immobile positive ions(d) holes as majodty ca iers

Clornei ' . drr: +odaer $ -q_ba Loo" jr

rg-r- q , sr- \4/b A ,A IcThe unit henry can also be written as :

(n) elarem$grn

(a) VsA 1 (b) 1\'b A 1 1c; es (.1) atl

12. 6l[ig n L-.]a rqo$$eir sladriGonener @laruGerafl rl-2.S2 A crofldu,

@ L.r I rga$$leoemri Clsnair@ gpab orrfleoeutilei aem66lrLrr@Lr G)r15u +leoro$orLi :

(€r ) 2.82 A <4G*; (6) 11.28 A ( Fr,) 21.76 AThe longest ,avelength that can be analysed by a rock salt crystal of spacing d :2.82 A'n t\e ff.: oroer is.r. ' 2.u-, A ,b' <.ol \ lt 28 { ,Jr 2t 7r, i

13. 6.er5lLB ggnu9el GpneirgLb 6pLrq X s$ri.""Grni_rnetflcir glpel erenorngClrpLrL:@6eirpg ?

(et) @teudJlai sruf p ererrirTreinaaid;r @u6o .+Dpdl6tgpgre- g oi'4eir e; L6il66'6in g urie +x j a5la 3,jg,6 ,,Gr.g b " ad 1- 6irs6i'l6irr $u da + jgalo 1jg\.,, g- 6.C h s@t * orLb G gThe energy oI a photon of charactedsti. X-ray ftom a Coolidge tube comes ftom :

(a) the kinetic energ_v of the 6.ee electrons of the target(b) the kinetic energy oI ions of the target(c) the kmeti. energv of the sh.iklng electrorl(d) an atomic hansition in the target

13 67 27

14. Gl rLrtlo 9tur6.11urrrigtir $palenL, GI$goironeoar:

(.4 ) pg;r,.neiroe {$d"-g,re6iTsciT$,,-s$iac ' P -sa!6isdr

I'he ionisaiion po\a-er is maximum for :

(a) neutrons

(c) 1-rays

(b) d - particles

(d) fi-particles

5028

(n,) 1.468

(d) 1.468

| $)19lrqo / Tum over

15. 1kg Sl6opu l6iT6Jr GIL.r rqci g:r(gcnglL:r116 +0p6Dr5 LonlpL,ru@LiGrng L(D6un(gd

+n_6n.2

@,r< rct. t 1€-. 'r l0'rl '6, ,l (Fr.) 3 x108 J

If 1 kg of a substance is fully converted into energy then the enelgy produced is I

(a) 9x1015J F) 9x10241 (c) 1l (d) 3 x lorJ l

lb. s@ grril $' 6ere$a'a!el - L eir-QLb p956)ilo :

,g$s Q- .r nD +l @)d &u 1a eoror ei9la on

(g/a, @L:rnrnor 9g)d6(E rQcncoer efleoan

(6) ergltic<q Steoameq o9laren

(n') GerLrlr egtBog o9eoenr

The explosion of an atom bomb is based on the pdflciple of :

(a); uicontrolled fissionreaction

(b) controlied fission reaction

(c) fusion reaction

(d) thermonuclearreaction

I?. Gg cn Gpn -r 6lfoonai6u ur6irL@Lb s-8'l-d6 gGarGrn'r'1 :

(ei) co6(r (e! ) Nu'o (0) F"5e \e'.j"The radio-isotope used in the h-eatment of skin diseases is :

(a) Co6u (b) Na2a (c) Fese (d) P32

18. 60' pffi66l6ndr613i Gsnoor$$fsnolr gafler9leusdu 6rd;,)r ulrrg]?

(.:\) 1.132 (+) 1.414 (gr) 1s

The refractive index of the mediurn fol the polarisir-rg angle 60" is :

(b) 1.4:t4 (c) t.5

uruR{*ka[ii s ol ai' @@ ffi r

(a) 1..732

5 023

19. ,iBC crdfip Lr6rrur6i,r slo6ilrLrrLq6;

(-er) es + c

(g) AB +BC+ cA

The Boolean expressiorl ABC can be sirnplitied as

craieoLoLrr$sLb:

(+)^ E a,1(rP7 A +B+(-

(b) finjte positive

(r:1) infinite

(b) A. B. a

(d) rt +E+c

(n)

t)

srn 1

3111I

AB+ C

AB+BC+CA

20. s LD dl6in6rr(gEp l uluElei renen Sg qni.,ai*(€Dag S)eorGu 500 pr.c

Liieirgnrr$cop Bori$g 6euru.l ru@ib Geraoeu:

l2/ "l rs o rbre orr Gp dg.trl Lo$ r

($t) euqLnqciren cr$n&gfl Lo$Lrq ('-r) 19 q6rq65l

The ra'ork done in movin8 500 pc charge between two points on equipotential surface15:

(a) zero

(c) finite negative

21. ad1696 s6r eir a .pa ofl$ . ren

( e1 ) sn r rig Gpirgpoclilo @6+9b(g) sin r 619 erpngpoorlen @t6d;19rb

(@) (er) Lopprb (+) +61- 6t[6iirr@Li)

l;;,1 L -s', t o;3Lb r+5 .aoe ar i$rg1

l_ S-ell.la* ul refrac.ton u .|.l i\:!]nr(a) directly proportional to sin i

(b) inversely proportional to sin r

(c) both (a) and (b)

Gl) independent of (a) arld (b)

13672-77 aoza

22. gfirdrr $erLb 6sna:nr pird irria LbO ugei;r dleiirgenr,Ii. +g,cin $aro egLorersnosLtl[)o Glng, elgd;r l6loirrgeor crroor :

lf the length of a copper wire has a certain r.esistance Il, then on .1oubln1g jts letlgth, itsslre.ilic tesistance:

rdlrr.il I betome -.+rvill rcmain the same

l4 r hl, 16 LDLi.rsr| a,Li]

1E\ I ,Ftr6ir(q LDLISI&IT(5LD

(a) r'iIlbe doubled

(c) \'ill become,l times

(-.tt ymA," ;5 rr.rcre ri]\gTf lDrI0]LlL ill

J2(.) \

(b)

(d)

23. e(D 6LL CE 6L:6&duQeir pGpp[ c)]6lricl6l]ain dotremlg$gr 6r.9&srb A_., erefldo, pnEq 616!LO €rSlnGelrain@ifl6n dteireriqg$pr 6lrq5ris6 r

r.+rf (.+) "[ a, J2(g)) \InCE single stage ampliJier, if the voltage gain at mid,fr.equencv is ANl, then the voltagegain at lower cut off ftequencJ' is :

,*+

G)+ (b) J2 AN{ (d) +24. eO Ltcn6rfl Lde grrr$$aig$g 2 m Ggraooelidl r,4eirqeue Gefleq ,100 Vm r.

i ilg, er n efldL, o.er -0eir 4a ri GsJ ol t.,J V - | o-6. .:er o. b

("+r) s0 cm (e) 4 cm t&f/t ", \n) 1.s mElechic fieid jntensitv is 400 Vm 1 at a r:listance of 2 m from a point ci.urge. It \^,ili be100 Vm 1 at a distance:(a) 50 cm (b) 4 cm (c) 4 m (d) 1.5 m

25. ;Lb8l+ *geifld @g$g1 qp++pge1g 6)ei'rGernir.garprd enerfl ur lfl u9 eirr rguq :

(.r ) qeu$anpp6

(6) pg"r- 61 6D 6riu-r rE 56ir

The part of the AC generator: thatcircuit is :

(a) field magret(') slip $1gs

(4) Glo16lurr(a)ffiassen

lru+ G]+rLrqLb Loirgpore

6! 6n6r.Lr LN

passes the cufient fi.om the cojl to the extemal

split ngs

blushes

(b)

(.t)

Ltdtwq*,.ri. r. ffi $wis$ g m6. es ffi r | $15-rqo / 1'urn over

5028

1,6. grg 4lerLrq gefidapeopu9dlrg$g erllofrnq cfeoene4 GlrpLrr@derrt1.6erLrrqgoirig r$ona $er goiarun ru;irr@$$ennc.r q!r$eug1 crd;rerr?

: -.6i "6 Lo"o ng a5Qo

(g)ergeqLb Lonpngl

1$Tza9aflLbq ei9laneneq erfla.+ ggt.E6J6or qLb ontgrb s,ruLo[s peirrg G;5c

(r-r) er5)ofl6q er9looonerl er rfloo+ €1e6DLo6olqlo roEgLb g6ijlcol, o9r@ g<irgrQrflq6

A dilftaction pattem is obtained using a beam oI red light. What happens if the redlight is replaced by blue light ?

(a) bands disappear

(b) no change

(c) difftaction pattern becomes narron'er and crowded togeiher

(d) diffraction paltern becomes broader ancl farther apart

Fz1 uw +nerrir argl$luglein eLod,rl-r@:

p ldl , - ,l il po ldl sino'Jruo 4rr: .cl-. r' ; /

. ,."t6t ai - '.otdt

" ' t:v/.e = ro ldr r r

r r;: r'

Which of the following equations repr:esents Bioi Savart 1a1v ?

." c. Td/ .- , ,. tdr .u"rl(d) tl,) dD - .- -,

- : t,, )d/ r ., -; |r,'o/, ,

f .r lcrl oD| !T r'

l'> /- at3bt279 sozs

zs. $gqenefl r,&eirg4rr-arooi rqr rrlEilLe rq. anlfidr : L5 Gloneoo:olleo

e,m6o,, r rl3oiraret 6F* 5rO 6.ir':1lTLL5,op LrlGlqr "''lD t8prrr;'ril r d

Gpireooerll$g psn'$p 6+iuLrr$rb Gera;cu :

Two poini charg.rs +,:lt and lq" are Place.l i11 ail at a distance of 2 m apaft' tlne oi

the ciarges is mived torvards the other th-ough a distatce of 1 LL,l-he woik donc i":

q!q2(-er)le

ihe ct !.arilcie Lr :

(a) 1:1

2qr qz(+) 4-,,tu

2q rqzlb\

(gl) 9-s-,,!:;

-4!L

, .11q2( trl re;e.

Llrq2(.1) 16.."

(d) 1 :0

q 1q2(a) -

29. Srlro-n sn$puqeu$$ei; Gt+irgprpneo 6loneLll';D ?O !G[ni Lrg]6, 9(D

cl 51sqlib 9Gq p6DeGars$$o G1e9.$91-u@6Grn9, eleLr$$loir dgl

GleLuarr @ Lb an$gogiueu G)eonXrirciu erirosedtl 6in o'9dipr b garpGu : :

(.e)r:t g.f( z (A) 2:1 (r) 1:o

A proton ancl an (t Particle are Proiecteil !"'ith the-sane velocitl normal io a unilorm

magnetic fic1d. T1-re raiio o{ the iTragiretii: Lorer'Itz fori e experierlied bY the Proton and

30. u65Lr 6) r ngafl eir =leoeu$orLb

opooen;i enr$ppdeo ?

(et)g-P (g) $leoeGa;+rn (6) "+9othe r-avelength of the matter' wave is independent of :

(a) mass (b) velocity (c) momenturn (d) charge

uqg$l-u7rAnr-lggluq : orooeuGui gtrb u$eoor$gr o$arn6oq9ti15 er!1roru'ai6oeq Lir'

Note : ,{nsr.,er a1ry fifteen questions.

31.

iyffistiLa

15x3-45

32.

$arcu rIleirariuden orrti,.l o96lorua *'9e-".

State Causs's law in eiecirostatics.

$11 dlehardeir Grng 919 o[$$enq uQ6D @16lrorg oll I sriiair p ci (isn

g _.- g rqlad r'ru-6ir ._ . ,.1

\Mry is it safer lo be inside a car than standing uncler a tlee du ng iighh1hg ?

{visola?"eorn I pg-qo 1 T1,.".,v..t.

37.

38.

5028 10

33. gltgLrq $)eoeGerob 6t6rrDn6o 6r6/'6n.t i}t.$6iJr J}6Dg ul[g,]?l1. .i,,-, 'rt \e'o,.tv. Li\p rt. unn

3,1. 0'C -6b $)6GqmLo obLqu96ijr u5leirparr 10 O. etpcir dl6i,rparL Garlrproeu erarr0.004/'C. $rfl 6ir 6sn$$leoeu ullei etpeiir d)eirpeoreouri aaorri5 $;fhe resistance of richlome wire at 0.C is 10 O. ifits temperature coefti.ieni of resistanceis 0.004/"C find iis resistance at boiling point of water.

35. ."" I rrTGrulldn r-8ei;rarn$r65$peb ofl$laeoenri a,ge.State Faradays lau.s of electrolysis.

3(,. BnLieeiir oemroLb - 6)]6i),rLrrg

Define Thomson Coefficient_

dei:rLon$fl u9ein lugp $peir 6r6i'rpn6l 6r6irr6ir?

Wlal . pfii.rency ot a h aistormer ?

315 eg6rfl6n LrrulLo 4 A dleinGennrrLi 0.5 s aneu$$d g A gs Lonn;oGrrrgLo$Gpnqg +gor'ilei 50 mV 6l6in6ifl!_r&(g orgar+ ggair-,-r-@6pA 6-.f .). =.:.:,F*11eiroq966eorGu teiren lrflLonlg r-&eilgneinrd o-rira:a:..r_:i :i=Calcuiaie the mutual inductance between two coils *,hen a current oi -l { €hangr.g to8 A in 0.5 s in one coil, induces an emJ of 50 mV in the other coil

rdeiror$p eeoeusofl eill 6lpLrL9udqooir qgeinfl eoerld a,go.Mention any three characteristics of elechomagnetic waves.

parorlll606n6q Lo netflulloi.l 60 cc +ftriseopri 56i)rJs6l 300 rjl.d_ EorLi GlonalrrGerpooeu& gpnuggcn areuriaLr ll@LbGllng1 9. +pgrpur@dpg1. op$61$ ppeir60" era#lel eat;reoSleb reirar +riris<olugeir gl6fiol 6r6in6n?

A_ 300_mm long tube containing 60 cc of sugar solution pror:luces a rotation of 9. u,henpiace.l in a polaimeter. If the specific rotation is 60", ;atculate the quantig of sugrrcontained in the solution-

r6lela5lserfl eir erain6atru'l$ gr6rfl guroq6i'r p$grer$pcoen oqg51s.Write the p nclple of Millikan's oil drop expe ment_

41.

39.

40.

t3612711

n(95t5.

5 028

,\42.

43.

CLoneiuGel o0$ullein lueirirr@senenU'rite the applications of N.{osley,s larv_

. o n _ ; -eir 411air.Gm r; dugdr. . '0_86 ,n6i6)

\{hat are ihe limitations of electron micros.one I

,,Po21a o$)rflu:rie gGenGrnlq .g)]OgpGpgJ @6 c.-flenpoqoararqLi, OoB- 6)6Dp6rl66D6nL lLb q$r@$grnGrng LOarrS6 4GerGrnlrgleir stgx 6r6iirLongLb J eop . on er ari € 6niiJ A GeThe lrJioachve isotope ,rlo2 I undergoes a successive disintegration of two .r _ decaysandtwoE-decays. Fmd the rtomc number and mass numbeiof the resulting isotope.

rSr$p zeoo er<inpnci ereineor?

l\|hai is a breeder ieactor ?

6L,r,5 et+arrur +[r6in86iDlri eEdd rc=15 mA ofgrb Iu:30 pr.A erofldu,r-6leinGenmurj: Gug6oLb. o eir Lo$lLrarrri 66brrlidl@s.

The b;se current of a transistor is l0 BA and collectoi curent is 15 m_A. Determine thevalue ol curent gain 11.

47. er$ i r9eiigru$$loir ppL:ueinooii 6r6D6xcurgtlb gpeinfleoo 6r@gls. 2.)?W te any tfuee advantages o{ negative feerlback.

+8. gorfl rrflp alLGurnO 6r6fiugl urrgl? slp6ir Lru6irs6fld qGpglb geineogto(ggt6.l\hat is light emitting diode ? Give any one oI its uses.

49. NOT GGLLrou rueiiru@Lb q[[6ijr6l6iDLii r_6iein*$arp eleoTs.Drah' the circuit for NOT gate using bansistor.

50. gefl$engepae ei6e rr 'cdrnri "rir"1rai- aerorGugLb grrln 6n6i{iE Js.

Mention anv ttu.ee advantages of fibr.e optical communicalion system.

44.

45.

16.

" e ,. *,!4_^-". !.q_.?EUE$t-B lidi"u "a; ". g.5, _e rurn .,,.r$'#5rrr"'-'-

/'

5028 12

Lr(ggil - IIII PART - III

1gdlnll : (i) eillenr rrerm 56 -{ig 66nri+Lrlrrs er9lcoiu ofliioe4 Lir. 7x5=35

(ii) dp(!]]eiror 11 o$emrtisofld) 6160arGurg)ldr gggl elr;:;oor99ageilll eo uu_: oi tis Golain@ rn.

(iii) Gg6D6r ur r6i-r @ rrisafl eu Lr Lr6rs6D6n 611 6D [6.

Note : (i) Answel question No- 56 compulsorily.

(ii) Ansu.,er any six of the remaining 11 questions.

(iii) Drau. diagrams wherever necessary-

51. @O O6D6drr$pr@ rfle Gp6Slu9eir r6lefiGp66 $)pgtrisnem Gsneoo-,eaui 6llpo.

Deive an expression for the capacitance of a parallel plate capacitoi.

52. G6!r6DL r8rreoqr uueirL:@$$ ddroeu$$loh sl6 dl6i,rp6o L6D ur d errglLbgrenpeou or91er rfl.

Desc be the experiment to determine the internal resistance of a cell using volhneter.

53. L6l6iir6iT(gpp Lorefl ullein p$gt6xS6Dpu u r$g reir o9eu rfl .

Explain the p nciple oI a potentiometer with a neat diagram.

100 eDgr6(ggLb, 20 Gle.d. :B[19lLb 6lorainr oL.b19i +6ofleir erg!Gu.l.

5 A L6l6iirc6irrilLlb unu.l6lpg. sLbr9ri+6aflein e1&6oir 169l erg6ir 6DLourS66rtlgEgl

zo Ge.rf. Gpneocuoflen en$p$ g:raoue0eir o$lLr 6 eoerrri; +aarri,6l@s.

A circular coil o{ radius 20 cm has 100 tums wire and it carries a clrrreni of 5 A- Findfhe magnetic induction at a point along its axis at a distance of 20 cm from the centeof the coi1.

gO egdr L6ir6rLr6r(qL! Lr[L]Lrc1i6o6l Lo[Eg6!g6ir 1LoelLb.e1$eu dleinaflu.l61g

ell 6ii s 6nrS glarQi o6ler!ara erlle-ri 9e.

Explain hon'an emf can be induced by changing the area enclosed bl/ the coil.

54.

.55.

13 5028

56. 1 Cle.d. .:oe,r$Si 5000 G5rO.Efi 6!6,Iu]LrLr,-L ellailo r e9oenq&dpfleml Lr9en dgl grfluc"n Uelp96u OOI5O @eoeor,ia$eop goiiLr n<mgt r@LbrqenordsLrr@Jletrpg Sfair;rrLb or rflene LllL:r Li 30' G5rerir$$l6! 6I!irLLr6irgeri u! dii :1arer$enLb erdnem?

g16D60g]

et@$g@pp @grreorsaleir eoLourrsqgg&1g $eorLrrrL_ Ggneoeuo4 O.zS d.d.t.; d Cl6nenru.Llldr $- I $,5r1!1.; Elcnqeqg&E @aorLrrrr Glo,rcoeuor9leoem6

oom&6@s.

A para11el beam of monochlomatic light is allowed to in.ident norrnallv on a planehansmission gratrng having 5000 lines per ceniimeh-e. A second older spechal line isfound to be difiracted at an angle of 30'. Eind the i\,'avelengih of thc ligllt.

ORIn Young's experiment a light of {requency 6 r 1014 Hz is used. Distance betl,!'een thecentres of adjacent h-inges is 0.75 mm. Calculate the distance beth,een the slits i{ thescreen is 1.5 m alvay,

57. X-6$i. o!)e"iLbr o,!)enere9!sr6Dr Lll[r{i er9lpeouri Clrgo.Dedve Bmgg's Ia\,'for X-ray diffftction.

58. Gcil Lr96in er!)arenerl ereinpnel ereheu? goi LEeir z6$palleh eli$aeoond a.gtoWhat ls phoioelect c e{fect ? State the laws oI photoelectric emission.

59.

6-1.

62,

goeh genf)eh $lrop =lrg6ir eur6l SeopaouLr Grno greirE Lordlg crerflel, gseir

@ui,rgLo $lensGoraLb u ngt?

At l1tat speed is a particle moving iJ the mass is equal lo three times its rest mass ?

o- spiae!en (6en"".1-n e$lnsofldr) uenrqeafloi ereoeuGugtLb gS$aren oqggto.lvrite anl five properties of d - ravs (A1pha rays).

6eeni ar-Grr r dlnang$E; dltooLlrnemno 6leueur@ereog er9orfl.

Describe ihe a.tion of zener diode as a Yoltage regulator.

ClsLr:laossGsn;ir paerel GgnrriEldr geircoooeir LIESb 15alDLrtr$r66ir Lrrrci]elr?

\'Vhat are the meits an.l demerits of satellite commuricatiorl s\.steD ?

60.

lFT'1'1-.t i i ii''-:,1:.1, la: :.{l; :'l"a | $q9rqo / Turn over

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5028

53_

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14

u(qJtl -ryl PARr-rv

gdnll : (i) ereootGulgl6 pnoinqg e$emrrioqg6(g 6rtl@Lu_r6rfl 6s6q6. 4x10=40

(ii) Ggenornr@ri $rruoofldu rrrllcoir oueoTa.

Note : (i) Answer any four questions in detail_

(ii) Draw diagrams wher:ever necessary.

do @69geoeo 6r6iirpr6l 6r6ir6n? r6air @t1i519:arenu9eir p@eueo76 Gorr qgtcirongg qohofl u9en deiirqo$$l$oiren Gsraroroou.lu Gl ugs.l ahat is an ele.tric dipole ? Derive an expression for the elechic field due to an electdcdipole at a point on the equatorial line.

64. 6De6c6rrL[retl]eir p$gt6rrb, eleoLolr q Lo$grb @urargrb eflgrb qdueu$arporllarrfl.

Explain in detail the pdnciple, consiruction and working of a cyclofuon.

65. Long$eoe rtrl aiirafl u BqgorQ eo e g:eu Lb geinp Glpnui @ aroru rg gt ciren

dleinpeoru n&61'R' rfleingrrrainq'L' LDog rb rlloinGpri;8,C, 96luorf g uoin

Seoeomrisuur@cirorg. r-0riirarg$p srriIurb opgrb rde or$rinq IrLirgdu.lerf arpri 6snain@

(, 6lpJrgLrur6iir dleirenqg$pLb

(ii) 16laiir6 etr$ nL r q

(iii) dl6i'rc6irnLLd o$grb L6loiren qg$p Lb @a>rGuurar ouu$6lpnrftqgdu.ler$grisnam eooinun@saooi er1gor9.

A source of alternating emf is comected to a series .ombination of a resistor ,R,, aninductor'L'and a capacitor'C. Obtain with the help of a voltage phasor dia#am andimpedance diagram an expression for :

(i) the effective voltage

O the i^rpeddn. e

(iii) the phase relationship between the curent and the voltage.

15

66. 6DpDA dir6iD S.$SJ6rp6Dp6; edg6. et 606Dri GlsneireoseouLr r u efir @p$i

basis of wave theory prove the lan,s of r.eflection.

67. He - Ne G6Dsfl6in Gpoflerneo L]rLb ouatl$g] stpeir Gleu.JeLunrart gppel mruera r, $$aii. e Ao! u l, 6i,r 66 6-i ga.Draw a neat diagr.am of He-Ne iaser anrl explain its vr,orking r,r,ith the help of energvlevel diagrarn.

68. s$|flu.ltia 6arpq o0$leou.ld e-gs. N=Noe-rt erei,rp Gsreooreoul 6lups. eleoqr+u lLorcDri Lo[E6 Seopeq otrdl6rjl @errEd]Eg g)arrl:urr G)grrftaor 6uEs.State the radioactive law of disintegration. Estabiish l.he reiation N=N.e rr. Derivethe relation between half life per.ioJ and decay constant.

69. Geudunr@Lr Glrllrid eroinpnel 6r6i,r6fi? L6l6i,leEg u I L_$g ror gig6euebrnr@Lr 61u1g&Cl erereu ng e,LGt6 6lLr(j&dlLrioa 6JureuLl6Ap9ereirleop erli)arfl.

I4illat.is an operati_onal amptifier ? With.a.circuit diagiam, explain dre working of anoperational amplfier as a summing amplifier.

70. sglLl Gler:oireoon Gipneoaurisnrfl gafluquLqltgl6i,r 6leu_l6l L.t rrr6or sI rl._rrrboJ6D[ES] 686iii(gs.Describe monochrome TV h.Bnsmission with a block diagram.

-oOo-

ffi mr,!.",86$Bs*I ffi A' 6 s {iiB

cr$G[n6rinq oL9lpooen pgL9.

Stale Huvgen's principle. On the

s02 8

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