rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h ud;r rdyq, Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College Matara Rahula College - Matara

rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq,

jsoHd,h - ud;r rdyq, jsoHd,h - ud;r Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College – Matara

f;jk jdr mßËKh- 2015 T h i r d T e r m T e st - 2 0 1 5 fN!;sl úoHdj Physics  1'

meh 02 Two Hours

13 fY%aKsh Grade 13

m%Yak ish,a,gu ms
2'

n - XY

2' ny - X

3'

n -X y

4'

ny -

x y

5.

ny - XY

uhsfl%da óg¾ ial=remamq wdOdrlhk Y=kH msysgqu my; mßos fõ' fuys wka;,d,h

1 mm jk w;r 2

jD; mßudkh fldgia 50 lg fnod we;' uq,dxl fodaYh l=ulao@ 45

5

3'

1'

th 0. 02 mm jk w;r ñkqug tl;= l, hq;=h

2'

th 0. 02 mm jk w;r ñkqfuka wvq l, hq;=h

3'

th 0. 07 mm jk w;r ñkqug tl;= l, hq;=h

4'

th 0. 07 mm jk w;r ñkqfuka wvq l, hq;=h

5.

th 0. 05 mm jk w;r ñkqug tl;= l, hq;=h

my; i|yka iólrKfha v hkq m%fõ.ho g hka .=re;ajc ;ajrKho  hkq mDIaál wd;;sho  hkq >k;ajho fõ' v2 = 1'

4'

2'

L

g 2  A ys udk jkafka 2  3'

LT

LT-1

LT-2

4'

5.

L2

iDcq ;sria ud¾.hl .uka lrk jia;=jlg ksh; ;ajrkhla we;' fuh ;=kajk ;;amrh ;=, 30 m ÿrla .uka lrk w;r p,s;fha miajk ;;amrh ;=, 50 m ÿrla .uka lrhs' jia;=fõ ;ajrkh jkafka" 1'

5.

5 ms-2

2'

6 ms-2

ldrhla .uka lsÍfïos .ufka m
3

1'

48ms-1

3'

3

8 ms-2

4'

10 ms-2

ÿr 10ms-1 fõ.fhkao fojk 1

3

5.

12 ms-2

ÿr 20ms-1 fõ.fhkao

ÿr 60ms-1 fõ.fhkao .uka lrhs' uq¿ .uk i|yd idudkH fõ.h 2' 40ms-1

3' 30ms-1

4' 24ms-1

5. 18ms-1 1

ne¨khla 12 ms-1 fõ.fhka by,g .uka lrk úg th 65 m Wila fmd,j uÜgfï isg by,ska

6'

msysgk úg ne¨kfhka .,la uqod ysrkq ,efí' th fmdf,dj fj; ,Õd ùug .;jk ld,h jkafka" 1'

2'

13 S

3'

6.5 S

4'

5S

5.

3.5 S

2.5 S

lr;a;hla iDcq ;sria ud¾.hl 30 ms-1 ksh; fõ.fhka p,s; fõ' p,s;h jk lr;a;fha isg

7'

jia;=jla uqod yeßh hq;af;a lr;a;h 90 m .ukal, miq th lr;a;h ;=,g kej; meñfKk f,ih" jia;=j lr;a;hg idfmaCIj l=uk fõ.hlska iy ;srig wdk;j l=uk fldaKhhlskao uqod yeßh hq;= jkafka@

8'

1'

30 ms-1, 30o

2'

15 ms-1, 90o

4'

60 ms-1, 0o

5.

20 ms-1, 90o

15 ms-1, 30o

3'

fmkajd we;s mßos ;srh iu. iu fldaKhla iys;j B;,fhka fmkajd we;s osYdjg .,la ùis lrkq ,efí' jD; m%;sfrdaOh fkdi,ld yeßhfyd;a my; l=uk m%fõ.h (v), ld,h (t) iu. vx iy vy úp,H jvd;a fyd|ska ksrEmkh lrhso@

v

vy v

v

v

vx

t

0

0

(A)

9'

t

t

0

(B)

0

(C)

Vx

vy

1'

B

C

2'

B

A

3'

A

D

4'

B

D

5.

B

B

t (D)

yrialv fCIa;% k,h A jq nghlska ;sriaj 3v fõ.hlska taldldr c, myrla uqod yßkq ,nk w;r th 3v fõ.fhkau isria ì;a;sh u; .efÜ v fõ.fhka ish¨u c,h ì;a;shg ,ïnlj fm,d mkS kï iy c,fha >k;ajh  kï ì;a;sh u; fhfok n,h 4  v2

1' 10'

2'

2A2  v2 3'

4  Av3

2  Av3

4'

12  Av2

5.

iqug ;sria fïihla u; .uka lrk A kï wxY=jla fïih u; ksYap,j we;s B kï wxY=jla yd .efÜ' A ys wdrïNl .uH;djh po kï" wxY=j, .uH;djh (p) ld,h (t) iu. fjkiajk whqre jvd;au fyd|ska ksrEmkh jkafka my; i|yka lskï jl%fhkao@ p

p A

A

B

0

A

B

t (1)

p

p

t (2)

p

B A

B 0

0 (3)

t

B

A t (4)

0

t (5)

2

11'

ialkaOh 2M jk A kue;s jia;=jla rEmfha fmfkk mßos iqug ;sria mDIaghla u; ;nd we;s w;r ialkaOh M jk B l=vd l=Üáhla jia;=jg uqÿfka ;nd we;' ksi,;djfhka mgkaf.k B l=Üáh A ys iqug mDIagh Tiafia my,g i¾mkh fõ' B l=Üáh A f.ka bj;a jk fudfydf;a A ys m%fõ.h v fokq ,nkqfka@ M

1' V =

B

4'

h

V=

2 gh gh 2

2' V =

gh

V=

gh 5

5.

3'V =

gh 2

2M A

12'

ir, wj,ïnhla idod we;af;a tla fl,jrla wp, ,CIhlg iúlr we;s 0.8 m os. jdfka fnda,hla t,aùfuks' fnda,h iy ;ka;=j ;sriaj weos isák fia ;nd miqj uqod yßkq ,efí' tys m:fha my
1' 13'

2'

1.0 ms-1

3'

1.5ms-1

4' 2.0 ms-1

5.

2.5 ms-1

isriaj by,g mekSfïos mqoa.,hl=f.a mdo u; fmd,fjka fhfok n,h (F) ld,h (t) iu. úp,H jk wdldrh rEmfha oelafõ' n,h (F) 0.3 ;=, oS mqoa.,hdf.a idudkH nr jk 650 N isg 1.430 N olajd jeä ù 0.1S ;=, oS ksYap,j mj;S' B,.g mdo fmd,fõ iam¾Yfhka ñfok úg Y=kHh olajd my; niS' mqoa.,hd fmd,fjka bj;ajk fõ.h jkafka" N

1'

1 ms-1

3'

2 ms-1

2'

1.5 ms-1

14.30

4'

3 ms-1

5.

10 ms-1

650 0.2

14'

S

0.4

0.3

isriaj m%lafIamKh lsßug wgjd we;s ialkaOh 5000 Kg jq frdlÜgqjl oyk jdhqfõ msgdr fõ.h 800ms-1 fõ' 20ms-2 wdrïNl ;ajrKhla frdlÜgqjg ,nd oSug oyk jdhqj msgl, hq;= iS>%;djh jkafka" 1'

15'

125.5 Kgs-1

2'

127.5 Kg 3'

137.5 Kgs-1

4' 185.5 Kgs-1

5. 187.5 Kgs-1

fmkajd we;s mßos PA yd QB ,qyq ;ka;= follska t,a¨ úg AB oKav ksoyfia t,af,a' oKafâ uOH ,CIh C fõ' oKafâ .=re;aj flakaøh" Q P

C A

B

1'

A j, msysghs

2'

B j, msysghs

3'

C j, msysghs

4'

A yd C w;r msysghs

5'

C yd B w;r msysghs 3

16'

ialkaOh 60Kg jk AB taldldr nd,alhla A fl,jf¾ isg 2m yd 9m ÿßka we;s wdOdrl folla u; iu;=,s;=,s;j ;nd we;' fuu nd,alh osf.a fofl,jrg ksoyfia wejosh yels ñksidf.a Wmßu ialkaOh jkafka" 1' 60 Kg 2' 100 Kg 3' 120Kg 4' 130 Kg 5. 170 Kg ;sria mDIaghla u; we;s ialkaOh 2Kg jq jia;=jla u; rEmfha fmkajd we;s mrsos P n,hla fhfokq

17'

,efí' mDIag fol w;r .;sl >¾Ik ix.=klh 0.5 fõ' jia;=j taldldr m%fõ.fhka .uka lrhs kï jia;=j u; wNs,ïNl m%;sl%shdj R fokq ,nkafka" R

P

1'

45o

10 N

2'10

3' 20 N

2 N

4' 20

5. 40 N

2

45o

18'

S ;ka;=fjys tla fl,jrla R okavl .=re;aj flakaøhg iúlr we;s w;r wfkla fl,jr W r¿ isria ì;a;shlg iúlr we;' rEmfha fmkajd we;s wkaoug okafvys tla fl,jrla ì;a;sh iu. iam¾Y lrñka iu;=,s; ù we;' ì;a;sh iy okav w;r iaÓ;sl >¾Ik ix.=Klh

1 kï ì;a;sh 3

yd okav w;r  fldaKhg ;sìh yels wju w.h' 1' 15o 2' 30o

R

3' 45o 4' 60o

5. 75o

S 

W 19'

rEmfha fmkajd we;s mßos wxY=jla ksh; V fõ.hlska jD;hla Tiafia .uka lrhs' P yd Q ,CI w;r wxY=fõ m%fõ. fjkfia úYd,;ajh jkqfha V

Q

1' o

1. 0

2'Vsin 40 3' 2Vsin20

4' 2Vsin 40

5. V

V

40o

P 20.

T - fg%da,shg >¾IKh rys; ;sria fïihla u; p,kh úh yels P yd Q hkq ialkaO iudk kuq;a T ys ialkaOhg jvd wvq ialkaO we;s jia;= foflys >¾IKh rys; lmamshlska .uka lrk ;ka;= u.ska P yd Q t,a,d we;' wdrïNfhaos T fïih uOHfhys iu;=,s;;djfhka ;nd we;' ;ka;= fofla os. ilid we;af;a P yd Q hka;ñka fmd,j iam¾Yj mj;sk mßosh' fg%d,sh fïifha fl,jrg we| w;yßkq ,efí' túg fg%d,sfha m%fõ.h (v) ld,h (t) iu. fjkiajk wdldrh l=uk m%ia;drfhka ksjerosj fmkakqï lrhso@ V

V

t

t

t

T

V

V

V

t

t

p

Q

4

21.

taldldr lïìhla rEmfha olajd we;s mßos kjd we;' ADB iy BEC w¾O jD; fõ' D hkq AD = DB jk mßos ADB w¾OjD;h u; msysá ,CIhls' moaO;sh D j,ska ksoyfia t,a¨j fyd;a AC yd isri w;r fldaKh jkafka" E

B

A

1. 0o

2. 30o

4. 60o

5. 90o

3. 45o

C

D

22.

os. L jk i¾jiu talldr .fvd,aa folla rEmfha fmfkk mßos ;sria fïihla u; tlWv tl fkdfmfr,k mßos ;nd we;' l1 yd l2 g ;sìh yels Wmßu w.hka jkafka ms
23.

1'

L L , 2 4

2'

L L , 2 6

4'

L L , 4 4

5.

L L , 4 6

3'

L L , 2 8

l1

l2

m,p yd L u.ska ms%;djfhka N%ukh ;eáhl N%uk wlaIh jgd wjiaÓ;s

1'

24.

>q¾Kh 8x10-4 kgm2 fõ' isriaj jefgk bá.=,shla ;eáh u; jefgkafka N%uk wCIfha isg 5 cm ÿßks' th weosu ksid tys N%uk iS>%;djh ñks;a;=jg jg 80 olajd wvqúh kï jegqk báj, ialkaOh jkafka" 1' 25.

2'30 g

20 g

3'

40 g

4'

50 g

5.

60 g

fudag¾ r:hla 10m wrhla we;s ;sria jD;ldr m:hl ksh; fõ.fhka Odjkh fõ' 1m os. ieye,a¨ ;ka;=jl tla fl
26.

2'

30o

3'

45o

4'

60o

5.

90o

yrialv fCIa;%M,h 0.008m2 (80cm2) jq îlrhl 0.1m (10cm) Wig c,h mqrjd we;' rEmigyfka oelafjk wdldrhg îlrh ;=, ;eáh u; ;enqúg olajk mdGdxlh 0.820kg fõ' îlrfha c, uÜgu 0.001m (0.1cm) m%udKhlska by, hk f;la th ;=,g we.s,a,la oeuqúg ;=,dfõ olajk mdGdxlh jkafka"

 1' 0.812kg 2' 0.820kg 3' 0.824kg 4' 0.828kg

5.0.836kg

5

27.

rEmfha olajd we;s mßos ,S lene,a,la iy .,a lene,a,la wvx.= l= vd îlrhla úYd, c, îlrhla ;=, mdfõ' .f,ys >k;ajh c,fha >k;ajhg jvd jeä w;r ,S lene,af,a >k;ajh c,fha >k;ajhg jvd wvqh' úYd, îlrh ;=, c, uÜgfuys Wi h ms
C. ., yd ,S lene,a, msg;g f.k tlg .eg .id c,hg oeuqúg tajd îlrfha m;=,g .uka lrhs kï h jeä fõ by; m%ldY j,ska i;H jkafka" 1'A muks 28.

2' A yd B muks

3' A yd Cmuks

4'

B yd C muks

5. A,B yd C

rEmfha fmkajd we;s mßos gexlshla ;=, we;s c,h tl tflys mßudj vo jq i¾jiu l=vd jdhq nqnq¨ u.ska taldldrj nqnq,kh lrkq ,efí' ialkaOh M iy mßudj V jq f.da,hla tys mDIaGh u; jdhq nqnq¨ tla;rd ixLHdjla /os mej;su fya;= fldg f.k fmkajd we;s mßos c,h ;=, mdfjñka mj;s' c,fha >k;ajh dw iy tu f.da,fha c,h ;=, mdfjñka mj;su ;nd .eksu i|yd /os mej;sh hq;= wju jdhq nqnq,a ixLHdj n kï 1'n =

4. 29.

M  Vd w vo d w

n>

2'n >

M  Vd w vo d w

vo d w

5.

M  Vd w

3. n <

n<

M  Vd w vo d w vo d w

M  Vd w

>k;ajh d1 yd d2 jk (d1>d2) ñY% fkdjk øj folla b;d úYd, úYalïNhlska hq;a is,skavdldr gexlshl wvx.= fõ' gexlsfha m;=,g wdikakfha l=vd isÿrla we;' lsishï fudfyd;loS øjhkaf.a Wij,a h1 yd h2 kï tu fudfydf;aos gexlsfhka øjh bj;g .uka .kakd fõ.h V l=ulao@ ^mDIaál wd;;sh iy ÿiai%dú;d n, fkdi,ld yßkak& 1'V =

2gh1 2' V =

5.V= 2 g (h1  30.

2 gh1d1 d 3'V= 2 g ( 1 h1  h 2 ) 4'V= d2 d2

2 g ( h1  h 2 )

h1

1

d2 h2 ) d1

h2

1

V

1

fjk fjku t,a,d we;s os. 0.5m iy 2.0m jk ir, wj,ïN folla tlu fudfyd;l tlu wdldrhg l=vd f¾Åh úia:dmk follg ,la lrk ,os' wj,ïn fol kej; jrla iu l,ia: jkqfha flá wj,ïnfha foda,k lShlg miqjo@ 1' 1

31.

2' 2

3. 3

4. 4

5.5

weos èjksudk lïìhl os. 143cm yd 145cm jq úg iriq,hla iu. ;;amrhg iamkao folla ,efí' iriqf,a ixLHd;h fldmuKo@ 1' 144 Hg

2' 284 Hg

3. 286 Hg

4. 288 Hg

5. 290 Hg

6

32.

weos ;ka;=jl uq,sl ixLHdkh yd tys ;=kajk m%ixjdoh w;r fjki 400 Hg fõ' ;kak;=fõ yd 0.5m o th 400N wd;;shlg Ndckh ù we;akï o ;ka;=fõ tall os.lg ialkaOh 1' 0.01kgm-1

33.

2' 0.02kgm-1

3. 0.09kgm-1

4.0.10kgm-1

5.0.20kgm-1

tlu wd;;shlg hg;aj we;s lïmkh jk lïì follska kq.eiqï iEosug kï A. tajdfha msgjk èjksfha ;rx. wdhduh iq¨ jYfhka fjkia úh hq;=h B. tajdfha os. iq¨ jYfhka fjkia úh hq;= w;r f¾Çh >k;ajh;a tlu úh hq;=h C. tajdfha f¾Åh >k;ajhka iq¨ jYfhka fjkiaúh hq;= w;r os. tlu úh hq;=h by; m%ldY j,ska i;H jkafka 1'A yd B muks

34.

2'B yd C muks 3. A yd C muks

4.A,B yd C muks

5.A,B yd C wi;H fõ

èjksudk lïìhl tla;rd os.la fjk;a èjksudk lïìhl 122cm yd 120cm os.la iu. fjk fjku lïmkh l, úg wjia:d foflaoSu kq.iqï folla idohs' wjia:d foflosu fojk èjks udk lïìfha wd;;s iudk jq w;r tajd lïmkh jqfhao tlu Wmß;dkfhks' m
35.

2'240 Hg

3.242 Hg

4. 244 Hg

5.246 Hg

10m os. we|s ;ka;=jla m%Njhla iu. wkqkdo jkafka mqvq 5la we;sjk mßosh" ;ka;=j ;=, ;rx. m%fõ.h 25ms-1 fõ' ;ka;=jg fhdod we;s wd;;sh m
1 lr kej; tu m%Njh iu. 4

wkqkdo ùug ie,ei fõ kï tys we;sjk mqvq .Kk@ 1'1 36.

2' 2

3. 2.5

4.3

5.10

jd;fha .uka lrk èjks ;rx. foll ;rx. wdhdu

80 80 m iy m fõ' fuu tla tla ;rx. 195 193

;=kajk ;rx.hla iu. 5Hz ixLHd;hlska kq.eiqï we;s lrhs kï jd;h ;=, èjks m%fõ.h jkafka" 1'300 ms-1 37.

2'320 ms-1

3'340 ms-1

4'375 ms-1

5. 400 ms-1

we¨ñkshï iy ßos lïì foflys os. 60cm iy 75cm fõ' tu lïì foflys tall os.l ialkaOh ms
fofla we;sjk mqvq ixLHd w;r wkqmd;h jkafka 1' 3' 5. tall

38.

Ag

1:1 2' 5:2 75cm 4:3 4' 3:4 2:5 os.l ialkaOh m jq ;ka;=jl tla fl¾IKh

rys; lmamshla yryd hjd M ialkaOfhkao rEmfha fmkajd we;s mßos iïnkaO lr we;' iriq, lïmkh l, úg rEmfha fmfkk wdldrhg ia:djr ;rx.hla idohs kï iriqf,a ixLHd;h jkafka" 1'

2 L

Mg m

2'

1 2L

Mg m

3'

4 L

Mg m

4'

1 L

Mg m

5.

2 m L Mg

L

7

39.

.sgdrhl lïìhla 191Hz ixLHd;hla iys;j iriq,la iu. ldur WIaK;ajhloS lïmkh l, úg ;;amrhlh kq.eiqï 5la wefia' tla;rd WIaK;ajhlg r;al, úg wefik kq.eiqï m%udKh ;;amrhg wgla olajd jeä fõ' ldur WIaK;ajfhaos .sgdrh lïmkh jkafka ljr ixLHd;fhayso@ 1' 181Hz

40.

2' 186Hz

3' 191Hz

4' 196Hz

5. 201Hz

A iqug ì;a;shl isg iuÿrlska B ys iúlrk ,o ;ks ixLHd;hlska hq;a iamSlrhls' A isg B olajd mSvk fjkiaúu i|yd ixfõos wkdjrlhla f.k hk úg ì;a;sfha isg 2m ÿrl os Yío uÜgfï wjuhla we;' Yíofha fõ.h 320ms-1 kï iamSl¾fhka ksl=;ajk Yíofha ixLHd;h jkafka" 1'

40Hz

2' 60Hz

3' 80Hz

4' 100Hz

5.160Hz

 A

B

8

rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h ud;r rdyq, Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College Matara Rahula College - Matara

rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq, jsoHd,h - ud;r rdyq,

jsoHd,h - ud;r rdyq, jsoHd,h - ud;r Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College - Matara Rahula College – Matara

f;jk jdr mßËKh- 2015 T h i r d T e r m T e st - 2 0 1 5 fN!;sl úoHdj II Physics II 

12 fY%aKsh Grade 12

meh 03 Three Hours

A fldgfiys m%Yak ish,a,g;a B fldgfiys m%Yak y;rlg;a ms
= 10ms-2

c,fha >k;ajh

= 1000kgm-3 A fldgi - jHqy.; rpkd

01'

mÍCIKd.drfhaos f.da,hl úIalïNh i|yd ,nd.kakd ,o ñkqï lsysmhla my; oelafõ' 10.01 mm, 9.98 mm, 9.99 mm, 10.2 mm I.

by; lshùï tlsfklg fjkia úug fya;=j l=ulao@ …………………………………………………………………………………………………

II.

by; ñkqï .eksu i|yd fhdod .kakd ,o ñkqï WmlrKh l=ulao@ …………………………………………………………………………………………………

III.

by; ñkqï weiqfrka f.da,fha úIalïNh .Kkh lrkak' ………………………………………………………………………………………………… …………………………………………………………………………………………………

IV.

úIalïNfhys m%;sY; fodaIh fidhkak' ………………………………………………………………………………………………… …………………………………………………………………………………………………

V.

f.da,fhys ialkaOh i|yd ,nd .kakd ,o ñkqu 4.8 g fõ' f.da,h iEos øjHfha >k;ajh fidhkak' ^  =3 f,i i,lkak & ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

VI.

Tng ñkqï irdjla iy c,h imhd we;akï f.da,fha mßudj ,nd.; yels fjk;a l%uhla i|yka lrkak' ………………………………………………………………………………………………… …………………………………………………………………………………………………

1

VII.

uq,ska wkq.ukh l, l%uhg jvd (VI) ys i|yka l%ufhys we;s jdishla i|yka lrkak' …………………………………………………………………………………………………

VIII.

f.da,h c, îlrh ;=
IX.

f.da,h c, îlrh ;=, ;sìhoS >k;ajh 1400kgm-3 jk øjhlska c,fhkys mßudjg iudk mßudjla îlrhg tl;= lr c,h iu. ñY% lrk ,os' oeka f.da,h c,h ;=, .s,ajd w;yeßh úg th u; iïm%hqla; n,h .Kkh lrkak' ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

02'

h1 d1 d1 d1

h2 d1 d1 d1

N+ñf;,a ^>k;ajh d1& iy CuSO4 ødjkhl ^ >k;ajh d2& >k;aj ixikaokh lsßu i|yd fhdod .kq ,nk WmlrK wegjqula by; rEmfha oelafõ' U k,fha tla fl,jrlg rn¾ k,hla yryd iïnkaO lr we;s rn¾ jeiaula iys; ;si,a mQks,h ol=Kq mi úYd, îlrhla ;=, we;s CuSO4 ødjkfha .s,ajd we;' I.

mÍCIKh i|yd w;HjYH fuys i|yka fkdjk WmlrKh l=ulao@ …………………………………………………………………………………………………

2

II.

mQks,h .s,ajk .eUqr h2 jeä lrk úg h1 ys w.hg l=ula isÿfõo@ ………………………………………………………………………………………………… …………………………………………………………………………………………………

III.

h1 iy h2 w;r iïnkaO;dj oelafjk m%ldYkhla f.dv k.kak' ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

IV.

m%ia;dßl l%uhlska

d2

d1

wkqmd;h fiúu i|yd iólrKh kej; ilia lr ,shkak'

………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… V.

iajdhla; iy mrdhla; úp,H olajkak' …………………………………………………………………………………………………

VI.

h2 g bosß h1 m%ia;drh my; oelafõ' tys wkql%ukh fidhkak'

VII.

N+ñf;,a ys >k;ajh 800 kgm-3 kï CuSO4 ys >k;ajh fidhkak' ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… 3

VIII.

CuSO4 ys idfmaCI >k;ajh fiúu i|yd by; mÍCIKhg isÿl, hq;= úlrKh l=ulao@ ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

03'

mÍCIKd.drfhaos jd;fha èjks m%fõ.h fiúu i|yd YsIHfhla fhdod .kakd ,o WmlrK wegjqula my; oelafõ' fï i|yd Tyq fjkia ixLHd; iys; iriq,a moaO;shla iy ógr rE,lao fhdod .kakd ,os'

I.

YsIHhd mÍCIKh wdrïN l, hq;af;a ljr iriqf,kao hkak fya;= iys;j olajkak'

II.

………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… fï i|yd Tyq iriq, ;nk wdldrh by; rEmfha weo olajkak'

III.

by; i|yka lrk ,o iriq, Ndú;d lr uq,sl wkqkdo wjia:d ,nd .kakd wdldrh fláfhka i|yka lrkak'

IV.

………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… uq,sl wkqkdo wjia:dfõ k,h ;=, ;rx. rgdj by; rEmfha we| olajkak' k,fha wdka; fYdaOkh e f,i i,l=Kq lrkak'

V.

k,fha wkqkdo os. l iy e weiqfrka ;rx.fha ;rx. wdhduh m%ldY lrkak'

VI.

………………………………………………………………………………………………… ………………………………………………………………………………………………… uq,sl lïmk ixLHd;h f i|yd m%ldYkhlaa jd;fha èjks m%fõ.h V iy by; rdYs weiqfrka ,shkak' ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… 4

VII.

m%ia;drhla we|su i|yd iqÿiq whqßka by; iólrKh ilikak' ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

VIII.

m%ia;drfha o< igykla w|skak'

IX.

m%ia;drh weiqfrka ,nd .; yels ;j;a m%;sM,hla olajkak' ………………………………………………………………………………………………… …………………………………………………………………………………………………

04'

fmd
I.

wj,ïnfha foda,k ld,dj¾;h T i|yd m%ldYkhla H iy h weiqfrka ,shkak' ………………………………………………………………………………………………… …………………………………………………………………………………………………

II.

h iu. T ys úp,kh mÍCId lsßu i|yd iqÿiq f,i by; iñlrKh ilikak' ………………………………………………………………………………………………… ………………………………………………………………………………………………

5

III.

YsIHhl= h ys w.h my; oelafjk wdldrhg úp,kh lrñka tla tla wjia:djg wkqrEmj foda,k 20 la i|yd .;jk ld,h ñkqï lrk ,os' 5.0 cm, 8.0 cm, 11.0 cm, 32.0 cm, 35.0 cm , 38.0 cm Tyq m%ia;dßl l%uhla Ndú;fhka .=re;ajc ;ajrKfhys w.h ks¾Kh lsßug n,dfmfrd;a;= fõ kï by; w.hhka fY%aKsfhys mj;sk fodaI 2 la i|yka lrkak ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

IV.

by; (II) iólrKh i|yd ,efnk m%ia;drfha o, igykla woskak'

V.

m%ia;drfhys wkql%ukh fiúu i|yd YsIHhd f;dard .kakd ,o ,CI foflys LKavdxl (20.0,3.62) iy (80.0, 1.22) fõ' m%ia;drfha wkql%uk fidhkak ^ X wCIh cm j,ska o Y wCIh S j,ska o f.k we; & ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

VI.

g ys w.h ks¾Kh lrkak' ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

VII.

H ys w.h m%ia;drh weiqfrka ks¾Kh l, yelafla flfiao@ ………………………………………………………………………………………………… ………………………………………………………………………………………………… …………………………………………………………………………………………………

6

B fldgi - rpkd 01'

I.

—mDIaG folla w;r iSudldÍ wjia:dfõoS iaÓ;sl >¾IK ix.=Klh" .;sl >¾IK ix.=Klhg jvd úYd,;ajfhka jeäh ˜ jia;=j u; fhdokq ,nk ndysr n,fha úYd,;ajh iu. >¾IK n,fha úYd,;ajh fjkiajk m%ia;drh Ndú;fhka meyeos,s lrkak'

II.

;srig 34o l wdk; ,E,a,la u; ialkaOh 60kg la jk fmÜáhla ;nd we;' fmÜáh yd ,E,a, w;r >¾IK ix.=Klh 0.25 ls'

a)

ñksfila fuu fmÜáh hka;ñka fyda my
b)

,E,a, u; ;nk ,o fmÜáh iqug ieye,a¨ ;ka;=jlska .eg.id iqug lmamshla u;ska hjd my; rEmfha mßos ,E,a, osf.a by
34o

02' a) fudag¾ r:hla tys frdao yd ud¾.h w;r >¾IK ix.=Klh  jqo" ;srig  wdk;shlska hq;a wrh R jq jx.= ud¾.hl .uka lrhs'

R



I.

jx.= ud¾.h ;sria ud¾.hla ù kï (  =0)" tu ud¾.fha jx.=j .ekSfïos fudag¾ r:h ,nd.; hq;= wdrCIs; m%fõ.h l=ula fõo@  = 0.4 o

II.

R= 100m o kï fudag¾ r:h ,nd.; hq;= wdrCIs; m%fõ.h fidhkak'

fudag¾ r:h yd ud¾.h w;r >¾IK ix.=Klh Y=kH ù kï (  =0) fudag¾ r:h ,nd .kakd m%fõ.h

g R tan  nj fmkajkak' tu.ska R=100m o  =10o o kï fudag¾ r:h

,nd .kakd tu m%fõ.h fidhkak' 1

(b) fudag¾ r:h ;sria iDcq ud¾.hl .uka lrk w;r;=r tu ud¾.fha wrh r (=20m) jq jD;a;dldr ud¾. ndOlhla yuqfõ' rEmfha mßos ndOlfha by
r

03'

wdlsñäiaf.a kshuh i|yka lrkak' a) uOHidr >K;ajh fiúug Ndú;d l, øjudkh 0.4 cm2 l taldldr yrialvla we;s n|lska yd f.da,dldr n,anhlska iukaú;h' øjudkh c,h ;=, mdfjkafka nf|ka 8cm la by,ska mj;sk mßosh' øjudkfha iïmq¾K mßudj 13.2cm3 ls' fuu øjudkh uOHidr ødjKfha .s,ajq úg nf|ka 1cm la by,ska mj;sk mßos mdfõ' 1 cm

8 cm

uOHidr

c,h

I II.

uOHidr >K;ajh fidhkak' øjudkfha ialkaOho oek .ekSug wjYH jqfha kï tu w.h o fidhkak' >K;ajh 1.028x103 kgm-3 jk id.r c,h u; >K;ajh 0.917x103 kgm-3 jk úYd, whsia

(b)

l=Üáhla rEmfha mßos mdfjñka mj;s' whsia l=Üáh

id.r c,h

I.

whsiaj, id' >k;ajh fidhkak'

II.

c,fhka by, we;s whsia fldgfia mßudj uq¿ mßudfjka lskï m%;sY;hlao hkak fidhkak'

III.

whsia l=Üáh iïmq¾Kfhkau id.r c,fha .s,ajd ;nd .ekSu i|yd l=Üáh u; 1.5x105N n,hla isriaj fhdohs' whsia l=Üáfha uq¿ mßudj .Kkh lrkak' 2

04' a) nZkq,s uq,O¾uhg wkqj ilik ,o fjkapqÍógrh øjh .,dhdfï iS>%;djh uekSu i|yd Ndú;d lrk WmlrKhls'

h

B

A

I.

k,h ;=,ska >k;ajh  jk øjhla .,dhhs kï A yd B ys mSvk fjki fidhkak'

II.

A yd B g wod, yrialv fCIa;%M,hka A1 yd A2 o" m%fõ. V1 yd V2 o kï V1 i|yd m%ldYkhla ,nd .kak'

III.

V1 weiqßka øjh .,dhdfï iS>%;djh (Q) ,nd .kak' A yd B g wod, k,fha wrhka ms%;djh fidhkak' úYd, Ndckfha yrialv fCIa;% k,h 0.5m2 ls' Ndckh m;=f,a isg 0.45m by,ska we;s isÿf¾

b)

yrialv fCIa;%M,h 0.9x10-4m2 ls' rEmfha mßos c, u;=msg wdjrKh jk mßos 25kg l ialkaOhlska hq;a Ndrhla fhdod we;' Ndckfha c, lf|a Wi 1m ls'

1m

0.45m

05'

I.

isÿfrka msgjk c, m%fõ.h"

II.

c,h ìu m;s; úug .;jk ld,h"

III.

c,h fmd,jg m;s; jk ia:dkhg Ndckfha ì;a;sfha isg we;s ;sria ÿr, fidhkak'

ialkaOh fkdi,ld yeßh yels ÿkq ksh; k jq fy,slaiSh ÿkakla tys tla flKdldr jia;=jla ;nd ÿkak x ÿrla iïmSvkh lrhs' A msysgqùfïos jia;=j uqod yßhs' jia;=j B ysos wrh r jk isria jD;a;dldr m:hl my
,Õd fjhs' jD;a;dldr m:fhaos jia;=fõ p,s;hg úreoaOj l%shd;aul jk uOHhl >¾IK n,h F fõ' C

r

m

A

x

B

I.

x ÿrla iïmSvkh ksid ÿkak u; .nvd jq úNj Yla;sh"

II.

B ysos jia;=fõ m%fõ.h 12ms-1 o ÿkafka ÿkq ksh;h 500Nm-1 o jia;=fõ ialkaOh 1kg o uOHhl >¾IKn,h 6N o wrh 1.5m o kï x ys úYd,;ajh yd C ysos jia;=fõ m%fõ.h" fidhkak'

b)

rEmfha mßos 10kg l ;eáhla i¾jiu ÿkq follg iïnkaO lr we;' ;eáh isriaj foda,kh l, úg wdj¾; ld,h 1.5 S ls' ialkaOh M jk ;j;a ;eáhla tu ;eáh u; ;nd kej; foda,kh l<úg wdj¾; ld,h 3 S ls' M ialkaOh fidhkak'

4