Unit O2 Mechanics

(1)

NkYs;s gupNrhjid xOq;fikg;gpy; jpzpTfs; m1 ck; m2 ck; ,Nyrhd ,io

xd;wpdhy; cuha;T> jpzpT mw;w fg;gp xd;wpd; Nkyhf ,izf;fg;gl;Ls;sd. jpzpT m1

MdJ cuha;tw;w fpilNkw;gug;G xd;wpd; kPJ tOf;Ffpd;wJ. m1 , m2 Mfpa ,U

jpzpTfspd; ngWkhdq;fs; > ,ilj;Jhuk; d > jpzpT m1 MdJ x1 If; fle;J kPz;Lk;

x2 If; flf;Fk; Nghjhd mjd; fjpfs; vd;gd mstplg;gLfpd;wd. gpd;tUk; vr;

nrad;Kiwf;fhf ,g; gupNrhjid mikg;ig gad;gLj;j KbAk;?

(A)ce;jf;fhg;ig tpsf;Ftjw;F

(B) rf;jpf;fhg;ig tpsf;Ftjw;F

(C) <h;g;gpyhd Mh;KLfypd; ngWkhdj;ij mstpLtjw;F

(1)(A) ,w;F kl;Lk; (2) (B) ,w;F kl;Lk;; (3) (C) ,w;F kl;Lk;

(4) (A),(B) vd;gtw;wpw;F ; (5) (B),(C) vd;gtw;wpw;F

(2019/New&Old/08)

(2) πkgm2 rlj;Jtj;jpUg;gKk; 0.1m MiuAk; cila tl;lj;jl;lhdJ rha;jsj;jpd; cr;rpapy;,Ue;J cUs mDkjpf;f rWf;fhJ cUz;L nry;fpwJ. jl;L ,aq;f Muk;gpj;jjpypUe;J5 KOr;Row;rpfis Mw;wpa epiyapy; mjd; NfhzNtfk; 2rads-1 vdpd; jsj;jpdhy;jl;Lf;F toq;fg;gLk; cuha;T tpir ahJ?(1) 2N (2) 4N (3) 5.5N (4) 6.3N (5) 7N

(2019/New& Old/09)

(3) fhh; xd;W nfhz;bUf;Fk; mjpAah; Mh;KLfy; 5ms-2 ck; kpff;Fiwe;j Mh;KLfy; -5ms-2

ck; MFk;. fhh; Xa;tpypUe;J Muk;gpj;J gpd; 20m Jhuj;jpy; cs;s xU Gs;spapy; kPz;Lk;Xa;tpw;F tUtjw;F vLf;Fk; kpff;Fiwe;j Neukhf ,Ug;gjw;F rhj;jpakhdJ.

(1) 2s (2) 3s (3) 4s (4) 5s (5) 6s

(2019/New&Old/12)

(4) 39 kg jpzpTila Fw;wp xd;W fpilNkw;gug;gpy; itf;fg;gl;L xU gpuNahf tpir F ,dhy; glj;jpy; fhl;bathW ,Of;fg;gLfpwJ. Nkw;gug;gpw;Fk; Fw;wpf;Fkhd ,af;ftpay; cuha;T Fzfk; 0.4 MFk.; Fw;wpahdJ Nkw;gug;G topNa khwh Ntfj;JlDk; ,aq;FfpwJ vdpd; F ,d; gUkd; ahJ

(1)100N (2)150N (3)200N (4)290N (5)400N

(2019/New&Old/15)

(5)

,U jpzpTfs; ,Nyrhd ,io xd;wpdhy;> fpilj;jsj;jpy; itf;fg;gl;l xU Mg;gpd; kPJ ,izf;fg;gl fg;gpfSld; njhLf;fg;gl;bUg;gij glk; fhl;LfpwJ. vy;yh gFjpfSk; cuha;tw;witahf cs;sd. ,io ,Wf;fkhf ,Uf;f jpzpTfs; Xa;tpypUe;J tpLtpf;fg;gbd; mjd; gpd; Mg;ghdJ

(1) m1 < m2 Mapd; ,lJGwj;jpw;F Mh;KLFk;. (2) m1 < m2 Mapd; tyJGwj;jpw;F Mh;KLFk;. (3) jpzpTfspd; gUkd;fspy; jq;fhJ ,lJGwj;jpw;F Mh;KLFk;. (4) jpzpTfspd; gUkd;fspy; jq;fhJ tyJGwj;jpw;F Mh;KLFk;. (5) njhlh;e;J xa;tpypUf;Fk;

(2019/New&Old/25)

(6)

X,Y,Z Mfpa Jzpf;iffs; jiuapd; xh; Gs;spapypUe;J fhl;bathW Fwpj;j fpil> epiyf;Fj;J Ntfq;fSld; vwpag;gLfpd;wd. gwg;Gg;ghijapy; mjpcah; Gs;spf;F rw;W Kd;dpUe;J rw;W gpd; tiuahd ,af;fj;jpy; fhl;lg;gl;l (P),(Q),(R) vDk; ghijfspy; X ,d; ghijahf ghij(P) mikapd; Y,Z ,vd;gtw;wpd; ghijfshf KiwNa mikaf;$baJ

(1) (P), (P)

(2) (R), (P) (3) (R), (Q)

(4) (Q), (Q)

(5) (P), (Q)

(2019/New&Old/29)

(7) R MiuAila epiyg;gLj;jg;gl;l tisak; xd;wpDs; r MiuAila xU tl;lj;jl;lhdJ tOf;fypd;wp khwhf;NfhzNtfj;jpy; tisaj;ij Rw;wp cUs;fpwJ.tl;lj;jl;lhdJ tisaj;ijr; Rw;wp ,aq;f vLj;j fhyk; T. tl;lj;jl;bd; tisaj;Jld; njhLifapYs;s Gs;spf;F Nenujpuhf tpl;lj;jpd; topNa jl;bd; gupjp kPJs;s Gs;spapd; fzepiyf; fjp ahJ?

(1)2R r/T (2)2R 2r/T (3)4R 2r/T (4)4R r/T (5)4R r/T

(2019/New/38)

(8)

fhl;ba Foha;j;njhFjpapy; epiy X MdJ vg;NghJk; 2 P0 vDk; khwh mKf;fj;jpy; Ngzg;gLfpd;wJ. FohapDs; neUf;Fk; jftw;w gpRf;fpd;wpa jputk; fhzg;gLfpwJ. Foha;fspy; A, B Mfpa ,lq;fspy; Rw;whlypy; cs;s tspapid FohapDs; GFtjw;F mDkjpf;ff;$baJk; FohapYs;s jputj;jpid ntspNa nry;y mDkjpf;fhjJkhd thy;Tfs; fhzg;gLfpd;wd. Fohapy; T1,T2 Mfpa %bfs; ,uz;Lk; %ba epiyapy; fhzg;gLfpd;wd. tspkz;ly mKf;fk; P0 vdTk; jputj;jpd; mlu;j;jp vdTk; nfhs;f. gpd;tUk; $w;Wf;fisf; fUJf.;

1. %b T1 I kl;Lk; jpwf;Fk; NghJ jputkhdJ √ 2 P0

vd;w fjpAld; ntspNaWk;.

2. %b T2 I kl;Lk; jpwf;Fk; NghJ jputk; ntspNaWk; fjpahdJ %b T1 I kl;Lk; jpwf;Fk; NghJ jputk; ntspNaWk; fjpia tpl cah;thFk;.

3. %b T1 ,id kl;Lk; jpwf;Fk; NghJ tspahdJ thy;Tfs; A,B ,uz;bD}lhfTk; Foha;f;Fs; nry;Yk;

(1) (A) khj;jpuk; cz;ikahdJ (2) (B) khj;jpuk; cz;ikahdJ

(3) (A), (B) khj;jpuk; cz;ikahdit (4) (A),(C) khj;jpuk; cz;ikahdit

(5) (A),(B), (C) vy;yhk; cz;ikahdit

(2019/New&Old/44)

(9) Muk;gj;jpy; tyJ gf;fkhf V vDk; khwhf; fjpapy; ,aq;Fk; cyq;FthDhh;jp xd;wpypUe;J kzy; mUtp xd;W njhlh;r;rpahf fPNo tpOfpwJ. gpd; ,t; cyq;F thD}u;jp rLjpahfj; jpUk;gp khwhf;fjp V cld; ,lJ gf;fkhf ,aq;f Muk;gpf;fpd;wJ. kzy; kPjhd tspj;jiliag; Gwf;fzpj;jhy; jiuapypUe;J ghh;f;Fk; NghJ kzy; mUtpapd; tbtj;ijf; fhl;LtJ. (fWg;Gg; Gs;spahdJ cyq;FthDhh;jpiaf; Fwpf;fpd;wJ.)

(2019/New&Old/50)

(10) 200N epiwAila ngl;b xd;W

rupTg;ghij xd;wpd; topNa xU

epiyahd fjpapy; 1.5m cauk;

xd;wpD}lhf js;Stjw;F kdpjdhy;

ngl;b kPJ nra;ag;gl;l Ntiy 560J.

rupTg;ghij jiuAld; 300 Nfhzj;ij

Mf;Ffpd;wJ> js;sg;gl;l ngl;b

RahjPdkhf ,aq;f mDkjpf;f

jsk;topNa rWf;fp ngl;b

Muk;gj;jhdj;ij milifapy;

ngl;bapd; fjpahJ

(1)1ms-1 (2) 2ms-1 (3) 3ms1

(4) \4ms-1 (5) 5ms-1

(2019/ Old /30)

(11) Fwpj;j Neu ,ilntspf;fhd nghUnshd;wpd; ,af;fj;jpd; MHKLfy; Neu tiugpd; gug;gpy; ,Ue;J Jzpaf;$baJ.

(1) Fwpj;j Neu Mapil ,af;fj;jpd; Nghjhd nghUspd; ruhrup Ntfk;.

(2) Neu Mapil ,Wjpapd; NghJ nghUspd; fjp

(3) Fwpj;j Neu Mapil ,af;fj;jpd; Nghjhd nghUspd; ruhrup fjp

(4) Fwpj;j Neu Mapil ,af;fj;jpd; Nghjhd nghUspd; Ntfj;jpy; Vw;gLk; khw;wk;

(5) Neu Mapilapd; eLg;gFjpapd; NghJ nghUspd; Ntfk;

(2018/07)

(12) tspr;rPuhf;fp xd;wpd; myF xd;whdJ jplkhd ,Nyrhd Nfhy; xd;wpdhy; RtUld; epiyg;gLj;jg;gl;bUg;gijg; glk; fhl;LfpwJ.

Nfhypd; Kidtplq;fspd; kPJ jhf;Fk; fpil> epiyf;Fj;J tpirfspd; jpirfis rupahff; fhl;LtJ.

(2018/14)

(13) xU kpfg;ngupa fspkz; cUz;ilnahd;W NkypUe;J tpotplg;gl jiuia milfpwJ. fspkz;zpd; GtpaPHg;G ikaj;jpd; MHKLfYf;Fk;(a) Neuj;jpw;Fk;(t) ,ilapyhd njhlHG

(2018/18)

(14) 30kg jpzpTila gdpf;fl;bf; Fw;wp xd;W rha;jsk; xd;wpd; kPJ itf;fg;gl;L 75N

tpirAld; js;Stjd; %yk; 1.5m cauj;jpw;F caHj;j Ntz;bapUg;gpd; rha;jsj;jpw;F ,Uf;f Ntz;ba Fiwe;j gl;r ePsk; ahJ?

(1) 3m (2) 6m (3) 12m (4) 4.5m (5) 9m

(2018/20)

(15) fzpdp xd;wpd; td;jl;L (Hard disk) 10 Row;rpfis epfo;j;Jk; NghJ Fwpj;j xU fjpia milfpwJ. Mdhy; kPz;Lk; xa;Tf;F tUtjw;F 50 Row;rpfis epfo;j;JfpwJ. td; jl;L khwh Nfhz MHKLfy; gUkd; x1, khwhf;Nfhz mkHKLfy; gUkd; x2 vd;gtw;iwf; nfhz;bUg;gpd; x1/x2

(1) 1

5 (2)

1

√5 (3)√5 (4)5 (5)25

(2018/23)

(16) cuha;Ts;s fpilj;jiu xd;wpy;, ge;jpd; jpzpT ikak;gw;wp Row;rp Ntfk; ,y;yhJ ge;jpw;F fpilf;fjp xd;W jsj;jpd;tspNa nfhLf;fg;gLfpwJ. ge;jpd; jpzpT ikak; gw;wpa Row;rp Ntfj;jpw;Fk; () Neuj;jpw;Fk; (t) ,ilapyhd njhlHig rupahff; fhl;Lk; tiuG.

(2018/32)

(17) Xa;tpypUe;J ngupa ngsjpftpay; Gj;jfk; xd;iw ifapy; gpbj;jgb ePH xU juhrpd; kPJ epw;Fk; NghJ mjd; thrpg;G 700N. t =1sec ,y; ePH Gj;jfj;ij Nky; Nehf;fp J}f;f Muk;gpj;J t = 2sec ,y; Gj;jfk; miu kPw;wH cauj;jpy; kPz;Lk; Xa;tpw;F tUfpd;wPh;.

juhrpd; thrpg;G (R) Neuj;Jld; (t) khWgLtij rpwg;ghf tiff;Fwpf;Fk; tiuG Nky;;tUtdtw;wpy; vJ?

(2018/34)

(18) fhl;ba ghj;jpuq;fs; rk mbg;gug;G A Ak; rk nfhs;ssT V Ak; nfhz;lit. ,it xt;nthd;Wk; KOikahf mlHj;jp pw cila ePhpdhy; epug;gg;gl;Ls;sd

ePhpdhy; ghj;jpuq;fs; xt;nthd;wpdjpd; tisgug;gpw;F nfhLf;Fk; tpisASijg;gpd; gUkd;> jpir vd;gtw;iw rhpahfj;jUtJ

(2018/44)

(19) fhl;lg;gl;l ,Nyrhd tpw;RUspd; Kidfspy; A, B vDk; rk jpzpTfs; ,izf;fg;gl;Ls;sd. njhFjpahdJ tpw;RUspd; mr;R epiyf;Fj;jhf ,Uf;f neUf;fpg;gpbf;fg;gl;L tpLtpf;fg;gl njhlUk; ,af;fj;jpy; A, B kw;Wk; njhFjpapd; jpzpTikak; (G) Mfpatw;wpd; Ntf(V) Neu(t) tiuGfis rupahf fhl;LtJ

(2018/50)

(20) RPuw;w nky;ypa cUisf;Nfhy; XY MdJ xg;gkhd Kid xd;wpy; njhl;Lf;nfhz;bUf;f ,Nyrhd ,io xd;wpdhy; $iuAld; ,izf;fg;gl;L rkepiyg;gLj;jg;gLfpwJ. Nfhypd; <u;g;Gikak; ,Uf;f$ba ,lk;.

(1) A (2) B (3) C (4) D (5) E

(2017/22)

(21) M jpzpTila Jzpf;ifahdJ a MiuAila tl;lg;ghijapy; khwhf;fjpapy; tl;l ,af;fj;ij Mw;WfpwJ. tl;lg;ghijapd; ikajjpDhlhd mr;Rg;gw;wp Jzpf;ifapd; Nfhz ce;jk; L vdpy; Jzpf;ifapd; ,af;frf;jp

(2017/29)

(22)

xg;gkhd cuha;tw;w fpil Nkir xd;wpd; kPJ rPuhd M jpzpTk; 2L ePsKk; nfhz;l gyif xd;W glj;jpy; fhl;bathW itf;fg;gl;Ls;sJ. gyifapd; <u;g;Gikak; Nkirapd; tpspk;gpypUe;J X J}uj;jpy; ,Ug;gJld; gyifapd; xU Kidapd; m jpzpTs;s rpwpa Fwwp xd;Wk; fhl;bathW itf;fg;gl;L gyifapd; ePsj;jpd; topNa Fw;wpf;F u Ntfk; nfhLf;fg;gLfpwJ. gyiff;Fk; Fw;wpf;Fk; ,ilapyhd ,af;ftpay; cuha;Tf;Fzfk; μ Mapd; Fw;wpf;F Ntfk; nfhLf;fg;gl;ljpypUe;J gyif NkirapypUe;J ftpo;tjw;F vLf;Fk; ,opT Neuk; ahJ? (ftpOk; tiu gyifapypUe;J Fw;wp ntspNatutpy;iy vdf; nfhs;f)

(2017/45)

(23) fhh; xd;wpd; fjp 108 km h-1 Mf cs;s NghJ 0.400 m tpl;lKs;s mf; fhh;r;rpy;ypd;

Nfhzf;fjp ahJ (rpy;yhdJ jiuapy; tOf;ftpy;iy vdf; nfhs;f) (1) 75 rads-1 (2) 150 rads-1 (3) 270 rads-1 (4) 540 rads-1 (5) 1080 rads-1

(2017/05)

(24) jpzpT m I cila xU Jzpf;if jiuapypUe;J ntt;NtW cauKs;s (h) Gs;spfspypUe;J nkJthf tpLtpf;fg;gl mJ tspj;jilf;F vjpuhf ,aq;fpj; jiuia milAk; NghJ mjd; ,af;frf;jp E Mapd; h cld; E khWgLtij fhl;Lk; tiuGfspy; rhj;jpakhdJ (tspapd; mlu;j;jpAk; <u;g;G Mu;KLfYk; khwtpy;iy vdf; nfhs;f)

(2017/19)

(25) ,Nyrhd tpiwg;ghd ,ioapd; xU Kidapd; m jpzpT ,izf;fg;gl;L ,ioapd; kw;iwa RahjPd Kid $iuAld; njhLf;fg;gLfpd;wJ. ,io fpilahf ,Uf;Fk; tifapy; Jzpf;ifahdJ gpbf;fg;gl;L ,aq;f mDkjpf;fg;gLfpwJ. Jzpf;ifapd; KO ,af;fj;jpYk; ,io mwhJ ,Ug;gjw;F ,io jhq;f Ntz;ba ,opT ,Otpir (1) mg (2) 2mg (3) 3mg (4) 4mg (5) ,ioapd; ePsj;jpy; jq;Fk;;

(2017/21)

(26) fpilj;jiuapd; Fwpj;j epiyapy; ,Ue;J A , B vDk; ,U Jzpf;iffs; xNu Neuj;jpy; vwpag ;gLtij cU fhl;Lfpd;wJ.

vwpag;;gLk; NghJ A epiyf;Fj;jhf Nky;Nehf;fp U Ntfj;ijf;; nfhz;bUg;gJld; B epiyf;Fj;jhf U Ntfj;ijAk; fpilahf V Ntfj;ijAk; nfhz;Ls;sJ. jiuia te;J miltjw;;F Kd;duhd mtw;wpd; ,af;fj;jpy; A rhu;ghd B ,af;fg;ghijahf miktJ

(2017/28)

(27) jiuapypUe;J Xu; Jzpf;if P Nky; Nehf;fp t = 0 vDk; Neuj;jpy; Muk;gNtfk; V cld;

vwpag;gLk; mNjNtis mg;Gs;spf;F Neu;NkNy h caukhd Gs;spapypUe;J ,d;Ndhu;

Jzpf;if Q xd;W nkJthf tpLtpf;fg;gLtij cU (a) fhl;LfpwJ. njhlUk; ,af;fj;jpy; ,ilapy; ,uz;Lk; xd;iw nahd;W re;jpf;fpd;wd. ,j;Jzpf;iffs; Muk;gj;jpypUe;J re;jpf;Fk; tiu mtw;wpd; ,af;fj;jpw;fhd Ntfk; (V) Neuj;Jld; (t) khWgLtij mUfpYs;s tiuG fhl;Lfpd;wJ. ,t;tiugpy; ∆ ABC , ∆ CDE , ∆ ADF gug;Gf;fs; KiwNa A1 , A2 , A3 Mapd; gpd;tUtdtw;Ws; h ,w;F rhpahd njhlu;G (1) h = A1 + A2 + A3 (2) h = A1 + A3 (3) h = A1 + A3 - A2

(4) h = A1 + 2 A2 + A3 (5) h = A1 + A2

(2017/41)

(28) r MiuAila J}a fz;zhb kaph;j;Jisf;Foha; X ePupDs; epiyf;Fj;jhf itf;fg;gl FohapDs; 2h cauj;jpw;F cs;s ePu; epuy; rkepiyapy; ,Ug;gij cU fhl;B;fpwJ. r , 2r , 𝑟/ 2 MiufisAila J}a kaph;j;Jisf;Foha;fshd Nrh;khdf;Foha;fs; (A) , (B)

(C) , (D) ePupy; epiyf;Fj;jhf itf;fg;gl;Ls;s NghJ fhl;ba msTfspy; cs;s ePu; epuy;fs; rkepiyapy; ,Ug;gjw;F rhj;jpakhdJ my;yJ rhj;jpakhdit

(1) (A) kl;Lk; (2) (A)> (B) kl;Lk;

(3) (A)> (B)> (C) kl;Lk; (4) (B)> (C)> (D) kl;Lk; (5) (A)> (B)> (C)> (D) vy;yhk;

(2017/44)

(29) cUis tbt jhq;fp xd;wpDs; glj;jpYs;s tbtj;jpyhd ,Uk;Gj;jpz;kk; xd;W mjd; mbg;gFjp eidahjthW itf;fg;gl;Ls;sJ. ,g;NghJ jhq;fpapy; nkJthf ePu; Cw;wg;gLfpd;wJ. mbj;jsj;jpdhy; jpz;kj;jpw;Ff; nfhLf;fg;gLk; kWjhf;fk; (R) ePu; VWk; cauk; X cld; khWgLtijf;fhl;Lk; tiuG

(2017/47)

(30) RahjPdkhf ,aq;Fk; nghUs; xd;wpd; kPJ xU tpir F gpuNahfpf;fg;gLfpwJ. Fwpj;j xU fz Neuj;jpy; nghUshdJ Ntfk; V IAk; MHKLfy; a ck; nfhz;Ls;sJ. fl;lhakhf xj;j jpirapy; ,Uf;f Ntz;ba fzpaq;fs;. (1) a ck; V ck;

(2) a ck; F ck;

(3) V ck; F ck;

(4) V,F,a %d;Wk; (5) ve;jxd;Wk; fl;lhakhf xj;jjpirapy; ,Uf;fNtz;bajpy;iy

(2016/05) (31) $iu kpd;tprpwpnahd;W epWj;jg;gLk;NghJ mjd; NfhzNtfk; 50% My; FiwtilAk;

fhyj;jpy; 36 Row;rpfis epfo;j;Jfpd;wJ. mJ Xa;tiltjw ;F Kd; Nkyjpfkhf epfo;j;Jk; Row;rpfspd; vz;zpf;if>(NfhztkHKLfy; rPuhdJ vdf;nfhs;f)

(1) 48 (2) 36 (3) 24 (4) 18 (5) 12

(2016/06)

(32) 1000kg jpzpTs;s thfdk; xd;wpd; ,af;f rf;jp 4.5x105 J. ,J 6000N khwhj; jLg;G tpir xd;iwg; gpuNahfpg;gjd; %yk; epWj;jg;gLfpwJ. epWj;jy; J}uk; ahJ?

(1) 37m (2) 75m (3) 150m (4) 300m (5) 750m

(2016/07)

(33) jpUF rhtp xd;W Mzp xd;iw g+l;Ltjw;Fg; gad;gLj;jg;gLtijg; glk; fhl;LfpwJ. Mzpapy; ikaj;jpypUe;J 0.25m J}uj;jpy; jpUF rhtpf;F nrq;Fj;jhf tpir F

gpuNahfpf;fg;gLfpwJ Mzp KOikahf ,Wf;fg;gLk; NghJ gpuNahfpf;fg;gl;l tpir 200N Nkyjpf ,Wf;fiy jtph;g;gjw;F ,lQ;Ropahf ,Uf;Fk; jilKWf;fk; ahJ?

(1) 8Nm (2) 42Nm (3) 50Nm (4) 1250Nm (5)5000Nm

(2016/08)

(34) 1.2kg jpzpT xd;W kdpjd; xUtdJ ifapdhYk; ,U epA+l;ld; juhRfspdhYk;

jhq;fgg;gLtijg; glk; fhl;LfpwJ. glj;jpy; fhl;lg;gl;l juhrpd; thrpg;Gf;fisAk; Nfhz

mstPl;ilAk; nfhz;L kdpjdpd; if jpBnud mfw;wg;gLk; NghJ jpzptpdJ Muk;g epiyf;Fj;J

Mh;KLfy; ahJ?

(1) 0.60ms-2 (2) 2.36ms-2 (3) 5.83ms-2 (4) 6.00ms-2 (5) 7.00ms-2

(2016/09)

(35) ePH Foha; jpUfp (Water tap) %ba epiyapy; ePHf;Fohapy; nghUj;jg;gl;lkNdhkdp

3.5 105 Nm-2 I thrpj;jJ. jpUfp jpwe;j epiyapy; cs;sNghJ kNdhkhdp 3 105 Nm-2

I thrpj;jJ. vdpd; FohapD}lhf ePhpd; Ntfk;>

(1) 1ms-1 (2) 10ms-1 (3) 100ms-1 (4) 0.1ms-1 (5) 1000ms-1

(2016/12)

(36) caukhd fl;llk; xd;wpd; NkypUe;J nud;dp]; ge;J xd;W tspapy; RahjPdkhf tpOfpwJ Neuk; t cld; ge;J tpOk; J}uk; S NtWgLtijr; rupahff; fhl;Lk; tiuG

.(2016/14)

(37) Giftz;b xd;W tY epiyak; xd;wpw;F epyf;fhp toq;FfpwJ tY epiyaj;jpd; njhopw;ghl;L mstPLfis fPOs;s ml;ltiz fhl;LfpwJ

tY epiyaj;jpd; jpwidj; jUtJ

(1)𝑃𝑡

𝑁𝑀𝐸 (2)

𝑃𝑁𝑡

𝑀𝐸 (3)

𝑁𝑀𝐸

𝑃𝑡 (4)

𝑁𝑀

𝑃𝐸𝑡 (5)

𝑀𝐸

𝑃𝑁𝑡

(2016/16)

FwpaPL myF

tY epiya ntspaPL (Output) P W

xU ehSf;fhd Giftz;bfspd; vz;zpf;if N

xU Giftz;bapy; cs;s epyf;fhpapd; jpzpT M kg

1kg epyf;fupapypUe;jhd rf;jp gpwg;gpg;G E J

xU ehspy; nraw;ghl;L Neuk;. t s

(38) 200N epiwAila ngl;b xd;W rupTg;ghij xd;wpd; topNa xU epiyahd fjpapy; 1.5m cauk; xd;wpD}lhf js;sg;gLfpwJ rupTg;ghij jiuAld; 300 Nfhzj;ij Mf;Ffpd;wJ> ngl;b mirAk; NghJ ngl;b kPjhd cuha;T tpir 150N js;Sk; kdpjdpdhy; nra;ag;gl;l Ntiy ahJ?

(1)150J (2) 300J (3) 450J (4) 475J (5) 750J

(2016/18)

(39) L ePsKs;s epiyf;Fj;J ntw;wplf; Foha; xd;wpy; ,wF xd;W

Xa;tpypUe;J tpOfpd;w Ma;T $lg; gupNrhjid xd;iwg; glk; fhl;LfpwJ.

NkypUe;J tpOk; ,wF Fohapd; mbia miltjw;F T Neuk; vLf;fpwJ.

Neuk; 0.50T ,y; Fohapd; Nkw;gFjpapy; ,Ue;J vt;tsT J}uk; tpOk;.

1. 0.13L

2. 0.25L

3. 0.38L

4. 0.50L

5. 0.75L

(2016/29)

(40) nky;ypa RtiuAila cUisg;ghj;jpuk; xd;Wk;> Fw;wp xd;Wk; xa;tpy; cs;s jputnkhd;wpy; ehd;F Kiwfspy; RahjPdkhf kpjf;ftplg;gl;bUg;gij fPOs;s cUf;fs; fhl;Lfpd;wd. h1,h2,h3,h4,h5,h6 Mfpatw;wpw;fpilapy; cs;njhlHGfSs; jtwhdJ (cUf;fs;

mstpilf;fika tiuag;gltpy;iy)

(2016/49)

(41)

xg;gkhd fpilj;jiuapy; xd;Wld; xd;W njhLifapy; ,Uf;fj;jf;fthW 2M , M jpzpTfisAila Fw;wpfs; itf;fg;gl;L mtw;wpd;kPJ KiwNa F1 , F2 vDk; fpil tpirfs; gpuNahfpf;fg;gLfpd;wd. mit Neuj;Jld; khWgLtij NkNy cs;s

,UtiuGfSk; fhl;Lfpd;wd ,UjpzpTfspw;Fk; ,ilapYs;s kWjhf;fk; Neuj;Jld; khWgLtij fhl;Lk; tiuGfSs; rupahdJ.

(2016/24)

(42) Gwg;Gg; gha;r;ry; (ski-jumping) Nghl;bapy; xU Nghl;bahshpd; ghij Gs;spf; Nfhl;bdhy; fhl;lg;gl;Ls;sJ. mthpd; gha;r;ry; Muk;gpf;Fk; Gs;sp P apypUe;J jiuia milAk; Gs;sp Q tiuahd ghijapy; fpilj;J}uk; x cld; mtuJ fjp v khWtijf; fhl;Lk; tiughf miktJ (tspj;jiliag; Gwf;fzpf;f)

(2016/40)

(43)

2000kg jpzpTila kpjit thD}u;jp (glider) fpil XLjsj;jpy; (level track) Vtg;gLk;NghJ mjd;kPPJjhf;Fk; tpisAs;tpir Neuj;Jld; khWgLtij tiuG fhl;LfpwJ. 40 nrf;fd; Kbtpy; mjd; Ntfk; ahJ?

(1) 2.5 ms-1 (2) 10 ms-1 (3) 50 ms-1 (4) 100 ms-1 (5) 500 ms-1

(2015/05)

(44) tpir ,izfutpjpia tha;g;Gg; ghu;g;gjw;fhd mikg;G fPNo

fhl;lg;gl;Ls;sJ. gupNrhjidapy; ngwg;gl;l ,izfuj;jpd;

%iytpl;lj;jpd; ePsk; (L) 4cm MFk;. X ,dJ rhu;G mlu;j;jp 8

MFk;. X MdJ ePupDs; Kw;whf mkpo;j;jg;gl;L gupNrhjid m1g m2g

nra;ag;gbd; mgwg;gLk; L f;F xj;j ngWkhdk;

(1) 2.4cm (2) 2.8cm (3) 3.2cm (4) 3.5cm (5) 3.8cm X

(2015/36)

(45)

fhl;bathW ePu;%o;Fk; gyif (diving board) kPJ ngz;nzhUj;jp epiyf;Fj;J rkepiyia Ngzpf;nfhz;L A apypUe;J gyifapd; kWEdpia Nehf;fp nkJthf efu;fpwhs;. efUk;J}uk; x cld; jhq;fpapdhy; gyiff;fhd kWjhf;fk; F khWgLtij fhl;Lk; tiuGfSs; rhj;jpakhdJ.(gyifahdJ A gw;wp Roy;tjw;FRahjPdKilaJ)

F F F F F

X X x x x

(1) (2) (3) (4) (5)

(2015/26)

(46) GtpaPHg;gpd; fPo; epiyfFj;jhf tpOk; Jzpf;ifnahd;wpd; jiuapypUe;jhd cauk; Neuj;Jld; khWgLtij mUfpYs;s tiuG fhl;Lfpd;wJ. Jzpf;ifapd; KbTf;fjp

(1) 0

(2) 1 ms-1

(3) 1.3 ms-1

(4) 1.6 ms-1

(5) 2 ms-1

(2015/13) .

(47) fhH ,ae;jpuk; xd;wpd; MLjz;L(piston) xd;wpd; ,af;fj;jpd; NghJs;s %d;W fzepiyfisg; glk;fhl;Lfpd;wJ.

,t; MLjz;bd; ,af;fj;ij mz;zsthf vspik ,ir ,af;fkhff;nfhs;syhk; MLjz;Lld; ,izf;g;gl;l Roy;jz;L(crank shaft) MdJ 1500 rpm vDk;NfhzNtfj;jpy; Row;wg;gLfpd;wjhapd; ML jz;Lnfhz;bUf;Fk; mjpAaH Ntfk; (1) 11 ms-1 (2) 22 ms-1 (3) 105 ms-1 (4) 110 ms-1 (5) 230 ms-1

(2015/24)

(48) fpilj;jiunahd;wpy; 10m ,ilj;J}uj;jpy; cs;s ,U Gs;spfspypUe;J A,B vDk; ,U

ge;Jfs ;xd;iwnahd;W Nehf;fp vwpag;gLfpd;wd. ge;J A fpilAld; 300 rha;tpy; Nky; Nehf;fp 20ms-1 fjpapy; vwpag;gLk; mNj Ntis ,d;NdhH ge;J B 20ms-1 fjpapy; 600 rha;tpy; mNj jsj;jpy; Nky;Nehf;fp vwpag;gLfpd;wJ. ge;Jfs; jiuia mila Kd;dH ge;Jfspd; ,af;fk; gw;wpa gpd;tUk; $w;Wf;fspy; rupahdJ. 1. A njhlHghd B ,d; Ntfk; Neuj;Jld; mjpfupf;fpd;wJ. 2. A njhlHghd B ,d; Ntfk; gUkd; Neuj;Jld; Fiwfpd;wJ. 3. ,U ge;JfSk; jkJ ,af;fj;jpd; NghJ xd;Wld; xd;W NkhJk; 4. ,U ge;JfSk; xNu epiyf;Fj;Jf; Nfhl;by; cs;s NghJ ge;J A ge;J B f;F Nky;

fhzg;gLk;. 5. ,U ge;JfSk; xNu epiyf;Fj;Jf; Nfhl;by; cs;s NghJ ge;J B ge;J A f;F Nky;

fhzg;gLk;.

(2015/29)

(49)

glj;jpy; fhl;lg;gl;Ls;sJNghy; xNu fpilj;jiuapy; itf;fg;gl;l α,β rha;it cila (α > β)xg;gkhd ,U rha;Kf Nkw;gug;gpd;kPJ xNu fpil kl;lj;jpy; A,B vDk; ,U ru;trk jpzpTfs; xNuNeuj;jpy; tpLtpf;fg;gl tpLtpf;fg;gl;ljpypUe;J rha;jsj;jpy; ,aq;fpf;nfhz;bUf;Fk;NghJ xNu fpil ,lg;ngau;r;rp mila vLf;Fk; Neuq;fspd; tpfpjk; 𝑇1

𝑇2=?

(2015/38)

(50) fpilj;jiuf;F NkYs;s Gs;spapypUe;J tpLtpf;fg;gl;l ge;J jiuapy;Nkhjp gpd;dijj;J

NknyOfpd;wJ. ,e;epfo;T kPz;Lk; kPz;Lk; epfo;fpd;wJ. ge;jpd; ,t; ,af;fj;jpw;Fupa fjp-Neu tiuig jpwk;glf; fhl;LtJs; rhj;jpakhdJ? (tspj;jilia Gwf;fzpf;f.)

(2015/32)

(51) ,aq;Fk; Jzpf;ifAld; rk;ge;jg;gl;l ,U fzpaq;fs; X,Y Neuk; t cld; khWgLtij fPOs;s tiuG fhl;Lfpd;wJ. X,Y Mf ,Uf;ff; $bait

(A) X MdJ xg;gkhd rha;jsnkhd;wpy; fPo; Nehf;fpr; ,aq;Fk; nghUnshd;wpd; nghwpKiw rf;jpiaAk; Y MdJ ,j; Jzpf;ifapd; ngah;T ,af;f rf;jpiaAk; tiff;Fwpf;fyhk;.

B) X MdJ rha;jsnkhd;wpy; fPo; Nehf;fpr; rWf;Fk; Jzpf;ifapd; ,af;f rf;jpiaAk; Y MdJ ,j;Jzpf;ifapd; kpPJ jil tpirfspdhy; nra;ag;gl;l NtiyiaAk; tiff;Fwpf;fyhk;. (C) X MdJ fpilj;jiuapy; ,aq;Fk; Jzpf;ifapd; kPJ njhopw;gLk; tpisAs; tpiriaAk; Y Md ,j; Jzpf;ifapd; N;tfj;ijAk; tiff;Fwpf;fyhk;,tw;Ws; rupahdJ/rupahdit (1) (A)kl;Lk; (2) (A),(B) kl;Lk; (3) (A) ,(C) kl;Lk; (4) (B),(C) kl;Lk; (5)(A),(B),(C) vy;yhk;

(2015/46)

(52) nrg;Gf; Fw;wpnahd;iw epPPupy; ,Lk; NghJ ePupy; mkpo;e;jJ. Mdhy; nrg;Gj;JUty;fis ePupy; ,Lk; NghJ mJ kpje;jJ. ,J gw;wpa gpd;tUk; $w;Wf;fSs; rupahdJ/rupahdit

(A) nrg;Gj;Jz;bdhy; ,lk;ngah;fg;gLk; ePupd; epiw nrg;Gj;Jz;bd; epiwapYk; FiwthFk; (B) nrg;Gj;JUty;fshy; ,lk;ngah;fg;gLk; ePupd; epiw nrg;Gj;JUty;fspd; epiwf;F

rkdhFk;. (C) nrg;igj;JUtyhf khw;Wk; NghJ mjd; fdtsT mjpfupf;fpd;wJ.

(1) (A) kl;Lk; ; (2) (A), (B) kl;Lk; (3) (A),(C) kl;Lk;

(4) (B),(C) kl;Lk; (5) (A),(B),(C) vy;yhk;

(2015/40)

(53) ePupdhy; epug;gg;gl;l %ba cUis tbtg;ghj;jpukhdJ khwhMHKLfy; a cld; ,Oj;J nry;yg;gLfpd;wJ. ghj;jpuj;jpd; neLf;F ntl;LKfj;Njhw;wk; xd;iwg; glk; fhl;Lfpd;wJ.ghj;jpuj;jpd; xNu fpilkl;lj;jpy; d

Ntwhf;fj;jpy; cs;s Gs;spfs; A,B apd; mKf;fq;fs; KiwNa PA,PB MftpUg;gpd; gpd;tUk; $w;Wf;fspy; rupahdJ.

(A) ghj;jpuj;jpd;Nky; kl;lj;jpypUe;jhd Gs;spfspd; Mok; h mjpfupf;Fk; NghJ A,B Gs;spfSf;fpilapyhd mKf;ftpj;jpahrk; mjpfupf;Fk;.

(B) ghj;jpuj;jpd; mbg;gug;gpd; kPJ jhf;Fk; jputj;jpyhd tpisAs; tpir mbg;gug;gpd; ikaj;jpy; ,Uf;Fk;.

(C) ghj;jpuj;jpd; RtH kPJ jhf;Fk; tpisAs;tpir ghj;jpuj;jpd; ikaj;jpD}L nry;Yk;.

(1) (A) kl;Lk; (2) (B) kl;Lk; (3) (C) kl;Lk;

(4) (B),(C) kl;Lk; (5) (A),(B),(C) vJTkd;W

(2015/43)

(54) ePH nfhz;l rPuhd cUistbtg; ghj;jpuj;jpDs; Nfhsj;Jzpf;iffs; mkpo;e;Js;s xOq;fikg;igg; glk;; fhl;Lfpd;wJ. Kisfs; ghj;jpuj;jpd; tpspk;gpy; ,Ue;J rkJ}uj;jpy; mike;Js;sd. KisfSk; Nfhsj;JzpfiffSk; mike;Js;s tpl;lj;jpd; topNaahd neLf;Fntl;ilg; glk; Fwpf;fpd;wJ. ghj;jpuj;jpd; ikaj;jpy; ,Ue;J l1

,l2 J}uq;fspy; KiwNa d1, d2 mlHj;jpfisAila rkfdtsTfisAila Nfhsj;Jzpfiffs; fl;b kpjf;ftplg;gl;Ls;sd.Kisfshy;toq;fg;gLk kWjhf;fq;fs; rkd; vdpd; ,d; tpfpjj;ijj; jUtJ (ePupd;; mlHj;jp dw MFk;)

1. 𝑑1

𝑑2 2.

𝑑2

𝑑1 3.

𝑑𝑤−𝑑1

𝑑𝑤−𝑑2 4.

𝑑𝑤−𝑑2

𝑑𝑤−𝑑1 5.

𝑑1−𝑑𝑤

𝑑2−𝑑𝑤

(2015/49)

Unit O7 Magnectic Field

Q Ans Q Ans Q Ans Q Ans Q Ans Q Ans Q Ans Q Ans Q Ans

(1) 1 (2) 4 (3) 5 (4) 1 (5) 2 (6) 1 (7) 2 (8) 1 (9) 2

(10) 4 (11) 4

Mechanics

01. khztd; xUtd; GtpaPu;g;G Ntftsu;r;rp g I fhz;gjw;F kpd;Kiw xd;iwg; gad;gLj;Jk; tifapy; cUtpy; cs;sthW Gjpa Kiw xd;iw tbtikj;jhd;. ,t;tikg;gpy; kpd; Kiwapdhy; ,aq;Fk; ,yf;f (T) fbfhuk; xd;W ,izf;fg;gl;Ls;sJ, kpd;fhe;jnkhd;iw cUthf;ff; $bathW Gyr;RUs; C kpd;Rw;wpy; ,izf;fg;gl;Ls;sJ. Msp K jpwf;fg;gLk; NghJ T ,aq;f Muk;gpj;J fjT D jpwf;fg;gLk; NghJ epWj;jg;gLk; vdTk; khztd; NkYk; tpsf;fkspj;jhd;.

(a) ,k;khztd; cUf;Fg;ge;ij njupT nra;jikf;fhd fhuzk; ahJ? ………………………………………………………………………………………………………………

…………………………….…………………………………………………………………………………

………………………………………………………………….……………………………………….…

(b) gFjp (a) ,y; ePu; vjpu;ghu;j;j njupTld; gupNrhjid njhlu;ghd mD$yk; xd;iw Fwpg;gpLf? ………………………………………………………………………………………………………………

…………………………….…………………………………………………………………………………

(c) ,g;gupNrhjidapd; gbKiwfisr; RUf;fkhf jUf? ………………………………………………………………………………………………………………

…………………………….…………………………………………………………………………………

(d) khztd; gjpT nra;a Ntz;ba thrpg;Gf;fisf; $wp mtw;iw vt;thW ngwyhk; vdf; Fwpg;gpLf? ……………………………………………………………………………………………………………… ………………………………………………………………………………………………………………

(e) gy thrpg;Gf;fs; ngw Ntz;b ,Ug;gpd; ePu; nra;af;$ba khw;wk; ahjhf ,Uf;fk;? ………………………………………………………………………………………………………………

…………………………….…………………………………………………………………………………

(f)

(i) GtpaPu;g;G Ntf tsu;r;rp g I fhz;gjw;F ckJ thrpg;Gf;fis njhlu;GgLj;jp rkd;ghl;il vOJf? ………………………………………………………………………………………………………………

…………………………….…………………………………………………………………………………

(ii) rhuhkhwp vJ? rhu;khwp vJ? ………………………………………………………………………………………………………………..............………………………………………………………………………………………………………

(g) ePu; vjpu;ghu;f;Fk; Neu;Nfhl;L tiuig mUfpy; cs;s mr;Rf;fspy; tiuf. (mr;Rfis njspthf Fwpf;f)

(h)tiugpd; gbj;jpwd; 0.2016 vdpd; GtpaPu;g;G Ntftsu;r;rp g iaf;fhz;f.

………………………………………………………………………………………………………………..………….……………………………………………………………………………………………………

(i),g;gupNrhjidapy; gFjp (g) ,y; ePu; vjpu;ghu;j;j gUkd; 10 m/s vdpd; g ,d; gupNrhjid tOitf; fhz;f?

………………………………………………………………………………………………………………

…………………………….…………………………………………………………………………………

(2016/Structure)

02. (a)Xu; Fwpj;j tiff;fyg;GNyhfj;jhyhd Fz;nlhd;W tspapYk;> fpsprNuhypy; Kw;whf mope;Js;s epiyapYk; cs;s NghJ ,ioapYs;s ,Oitfs; KiwNa T1,T2 MFk;. fyg;GNyhfj;jpdJk; fpsprNuhypdJk; mlHj;jp KiwNa ρm, ρg (ρm >ρg) MFk;. NkYk; nfhOf;fpAld; Fz;bd; fdtsT V.

i. T1,T2 vd;gtw;Wf;fhd Nfhitfis vOJf? ………………………………………….……………………….....…………………………………………

…………………………………………………………………………….……………………….....………

ii. tpfpjk; T2/T1 = 4/5, ρm = 6250 kgm-3 Mapd; (ρm –ρg) If; fhz;f. ………………………………………….……………………….....…………………………………………

…………………………………………………………………………….……………………….....………

iii. ,Oitfis mstplg;gad;gLj;jpa tpw;wuhrpd; ,opntz;zpf;if 0.1N Mapd; thrpg;G ngwg;gLk; ,U re;ju;g;gq;fisAk; fUj;jpw; nfhz;L rjtPj tO 10% my;yJ mjdpYk; FiwthapUg;gjw;F V ,w;F ,Uf;ff; $ba kpff;Fiwe;j ngWkjp ahJ? ………………………………………….……………………….....…………………………………………

…………………………………………………………………………….……………………….....………

(b) Nkw;$wg;gl;l fyg;GNyhfj;jhyhd ntt;NtW MiuAila Nfhstbf;Fz;Lfs; fpsprNuhiyf;nfhz;l caukhd ghj;jpuj;jpy; Xa;tpypUe;J tpLtpf;fg;gLfpd;wd.

i. ,wg;gH ehlhf;fshy; milahsg;gLj;jg;gl;l ,U caukhd gFjpfisAk;

Fz;L flf;f vLj;j Neuq;fs; rkkhf miktjpypUe;J vjid cWjpnra;ayhk;? ………………...………………………………..….....……………………..………

…………………………………………………………………………………...

ntt;NtW MiuAila Nfhsq;fSld; gupNrhjid Nkw;nfhs;sg;gl;L Miuapd; tu;f;fj;Jld; (r2) KbT Ntfj;jpd; (Vs) khwy; tiuGgLj;jg;gl tiuG fhl;bathW mike;jJ.

Vs=2𝑟2

9η(ρm-ρg)g

ii. gbj;jpwidf;fz;L fpsprNuhypd; ghFepiyf;Fzfk; η If; fzpf;f?

…………………………………………………….……………………….....………………………………

…………………………………………………….……………………….....………………………………

iii. η ,d; ngWkjpapy; ghjpg;ig Vw;gLj;Jk; #oy; fhuzp ahJ? …………………………………………………….……………………….....………………………………

iv. ePupd; ghFepiyf;Fzfk; kpff;Fiwthd 8.90 x10-4Pas vDk; ngWkjpiaf;nfhz;lJ ,g;gupNrhjidia gad;gLj;jp ePupd; ghFepiyf;Fzfk; JzptjpYs;s ,lHghL ahJ?

………………………………………….……………………….....…………………………………………

…………………………………………………………………………….……………………….....………

v. NfhskhdJ KbT Ntfj;ij mile;j gpd;dH fpsprNuhypD}lhf khwh ,af;frf;jpAld; tpOfpwJ. Mdhy; mjd; mOj;jrf;jp njhlHr;rpahff; FiwfpwJ. ,q;F rf;jp vt;tpjk; fhf;fg;gLfpwnjd;gij tpsf;Ff? ……………………………............................……………………….……………………….....………………

…………………………………………………………………………………………………….…………

03.. (a) fpilahd XLghij xd;wpy; NknyOtjw;fhf XLtjw;Fj; jahuhd epiyapy; Xa;tpy; cs;s n[w; tpkhdk; xd;iwg; glk; fhl;LfpwJ. tpkhdj;jpd; Fwpj;j ,e;epiyapy; mjd; ,ae;jpuk; ,aq;fpf; nfhz;Ls;s NghJk; jLg;Gf;fs; gpuNahfpf;fg;gl;bUg ;gjdhy; XLghij topNaahd tpkhdj;jpd; ,af;fk; jLf;fg;gl;Ls;sJ.

,q;F jug;gl;bUf;Fk; glj;jpw;F xg;ghd tupg;glk; xd;iw ckJ tpilj;jhspy; tiue;J Fwpj;j n[w; tpkhdk; kPJ jhf;Fk; gpd;tUk; tpirfs; xt;nthd;iwAk; xt;nthU mk;Gf;Fwpfs; %yk; tiue;J fhl;Lf. i. n[w; tpkhdj;jpd; epiw (W) ii. ,ae;jpuj;jpdhy; cQw;wg;gLk; tpir (T) iii. XL ghijapdhy; n[w; tpkhdj;jpd; kPJ toq;fg;gLk; nkhj;j tpir (F) (b) jLg;Gf;fs; tpLtpf;fg;gl;ld. ,ae;jpuj;jpdhy; cQw;wg;gLk; mjpAaH tpir 30kN n[w; tpkhdj;jpd; NknyOk;gy; fjp 50ms-1 n[w; tpkhdj;jpd; jpzpT 6000kg. i. n[w; tpkhdk; MdJ xa;tpypUe;J mjd; NknyOk;gy; Gs;spf;F gazpj;j kpff;FWfpa J}uj;ijf; fzpf;f. ii. tpdh i ,y; fzpf;fg;gl;l J}uj;ij tpl XLghijapd; J}uk; ngupjhf ,Uf;f Ntz;bajw;fhd fhuzj;ij tpsf;Ff.

(2018/Structure)

(c) Fwpj;j n[w; tpkhdk; Mfha tpkhdr; rhfrf; fhl;rpg;gLj;jy; xd;wpy; gad;gLj;jg;gLk; NghJ r MiuAila fpil tl;lg;ghijapy; 80ms-1 khwhf;fjpapy; ,jid gwf;fr; nra;a Ntz;ba Njitia tpkhdp nfhz;bUe;jhH. tpkhdj;jpd; ,wf;iffs; fpilf;F 300 rha;tpy; ,Uf;FkhW gwg;gjd; %yk; ,j;Njitia epiwT milar; nra;af; $bajhf ,Ue;jJ. n[w; tpkhdk; ,e;epiyapy; gwe;J nfhz;Ls;s NghJ mjd; kPJ jhf;Fk; ,U tpirfs; caHj;Jk; tpir L kw;Wk; epiw W glj;jpy; fhl;lg;gl;Ls;sd. n[w;tpkhdj;jpd; ,t; ,af;fj;jpy; tspj;jil tpisTfs; Gwf;fzpf;fg;glf;$baJ

i. caHj;Jk; tpir L ,d; ngWkhdj;ijf; fzpf;f. ii. Miu r [f; fzpf;f. iii. NkNy fzpf;fg;gl;l MiuapYk; Fiwthd MiuAila fpiltl;lg; ghijapy; Fwpj;j n[w; tpkhdj;ijg; gwf;fr; nra;tjw;F tpkhdj;jpd; fjp V, fpilAldhd rha;Tf;Nfhzk; θ vd;gtw;iw Kd;ida fjp (80 ms-1)> rha;Tf;Nfhzk; (30 0C ) vd;gtw;Wld; xg;gpLf.

(d) tpkhdr; rhfrf; fhl;rpg;gLj;jy; epfo;tpd; ,d;ndhU gFjpahf tpkhdp cUtpy; fhl;bathwhd epiyf;Fj;J tl;lg;ghijapy; xU khwhf; fjpAld; tpkhdj;ijg; gwf;fr; nra;fpwhH

i. Fwpj;j xU fjpapy; cUtpy; fhl;lg;gl;l tl;lg;ghij topNaahd Fwpj;j xU Gs;spapy; tpkhdpahy; epiwaw;w jd;ik czug;gLfpwJ.

1. tl;lg;ghijia tpilj;jhspy; gpujp nra;J> tpkhdpahy; epiwaw;w jd;ik czug;gLk; Gs;sp A I Gs;sb %yk; Fwpj;Jf; fhl;Lf.

2. Fwpj;j ghijapd; Miu r> tpkhdj;jpd; fjp V, GtpaPHg;G MHKLfy; g vd;gtw;wpw; fpilapyhd njhlHG ahJ?

ii. ,t; ,af;fj;jpy; n[w; tpkhdj;jpd; ,af;fj;ij ,U tpirfs; khwh epiw W kw;Wk; khWk; tpir P vd;gtw;iw mbg;gilahff; nfhz;L tpsf;FtJ trjpahf mikAk;. ,q;F P ,ae;jpuj;jhy; cQw;wg;gLk; tpir> ,wf;iffspdhy; caHj;Jk; tpir kw;Wk; tspj;jil vd;gtw;wpd; tpisAshf mikAk;. glj;jpy; Gs;sp B ,y; n[w; tpkhdk; epiyf;Fj;jhf Nky; Nehf;fp gwf;fpwJ. ,q;F tpir P tl;lg;ghijapd; ikaj;ij Nehf;fp jpirg;gLj;jg;glhjpUg;gjw;fhd fhuzk; ahJ? tpsf;Ff.

(2017/Essay)

04.

,aw;ifapy; ngUk;ghyhd ,af;fq;fs; Neh;Nfhl;L ,af;fj;ijAk; Row;rp ,af;fj;ijAk; nfhz;ljhf ,Uf;fpd;wJ

(a)

(i) cU (1) ,y;; fhl;bathW tl;lg;;ghij topNa v fjpAld; xLk; W epiwAila ngz; xUj;jpia mUNf cs;s cU fhl;Lfpd;wJ.,jid ckJ tpilj;jhspy; gpujpnra;J mtspd; mtsJ fhy;ghjj;jpy; jiuapdhy; nfhLf;fg;gLk; ,U tpirfisAk; Fwpj;Jf; fhl;LtJld; mtw;iw ngahpLf. mt;tpU tpirfisAk; toq;FtJ vJ vd jdpj;jdpNa Fwpg;gpLf

(ii) fhy; ghjj;;jpy; jhf;Fk; tpisAs; tpiria tiutJld; mtspd; Gtpah;g;G ikak; (G) I gUkl;lhf Fwpj;Jf;fhl;Lf. mt;thW Fwpj;jjw;fhd fhuzk; ahJ?

(iii) mts; xLk;NghJ tl;lg;ghijapd; ikaj;ij Nehf;fp rha;e;jpUg;ghs; mjw;fhd fhuzk; ahJ?

(b)

(i)mtspd; epiw W MfTk;> mts; XLk; fjp v MfTk; ,jd;NghJ jiuapdhy; mtspy; jhf;Fk; tpisAs; tpir Fr MfTk; mts; epiyf;Fj;Jld;

rhae;j Nfhzk; MfTk; ,Ug;;gpd; tpisAs; tpirapd; fpilf;$Wf;fhd NfhitiaAk; epiyf;Fj;Jf;$Wf;fhd NfhitiaAk; tl;lgghijapd; Miu R, W, v rhh;ghf ngWf. ,jpypUe;J tan𝜃 ,w;fhd Nfhitia ngWf

(ii) tl;lgghijapd; Miu 15 m MfTk; Xl;lf;fjp 7 m s-1 MfTk; ,Ug;gpd; epiyf;Fj;;Jld; rhae;j Nfhzk; itf; fzpf;Ff

(c)

(i) cU (2) ,y; fhl;bathW elf;Fk;NghJk; XL;k; NghJk; Vw;gLk; mjpfkhd mq;f mirTfis vspa Cry; xd;wpd; vspa

,ir ,af;fj;jpy; ,Ue;J tpsf;fyhk;. fhy; ghjj;jpd; xt;nthU mb vLj;J itj;jYk; mz;zsthf vspa ,ir ,af;fj;jpd; miu

miyTfhykhf ,Uf;Fk;. kdpjd; xUtd; 2 fhyb s-1 vd;Dk; tpjj;jpy; elf;ff;$batdhfTk; xt;nthU Kiw fhyb vLj;J itf;Fk;NghJ 90 cm efh;gtdhfTk; ,Uf;fpd;whdhapd; mtd; elf;Fk; Ntfk; vd;d?

(ii) elf;Fk; NghJ miyTWk; ghjj;jpd; cah; fjp vd;d? ,t;Tah;fjp mz;zsthf elf;Fk; fjpap;d; vj;jid klq;F MFk;?

(iii) miyTWk; ghjj;jpd cah; Mh;KLfy; ahJ? ,t;thh;KLfy; GtpaPh;g;G Mh;KLfyp;d; vj;jid klq;fhFk;?

(d)

(i)cU (3) ,y; fhl;bathW XLk;;NghJ ,Lg;;G %l;Lg;gw;w;p; kl;Lk; fhy;fs; CryhlhJ Koq;fh;;y; %l;L;g; ;;;;;;; gw;wpAk; CryhLfpd;wJ; vd;whYk;, Kf;fpakhd Cryhl;lk; ,Lg;G %l;Lg;gw;wpajhf ,Ug;gjdhy; ,Lg;Gg;gw;wp Cryhl;lkhff; fUjp fhy;fs; CryhLtjd; fhuzkhf XLtjw;F Njitahd rf;jpia toq;FtJ vJ vdf; $Wf?

(ii) ,Lg;Gg;gw;wpa fhypd; rlj;Jtj;jpUg;gk; I MfTk fhy;fs; CryhLk; NghJ fhy

ghjj;jpd; cah;NfhzNtfk; max MfTk; ,Ug;gp;d; ,t;cah;NfhzNtfk; vq;F

Vw;gLfpd;wJ vdTk; (A my;yJ B) cah; Row;rp ,af;fggl;Lr;rf;jpf;fhd NfhitiaAk; vOJf. ,r;rf;jp XLtjw;F Njitahd rf;jpia toq;Ffpd;wjh? tpsf;Ff.

(2015/Essay)

05. Gifapujg;ngl;bnahd;W 2m ,ilj;J}uj;ij nfhz;l jz;lthsj;jpd; Nky; xU tyg;gf;f tisitf; flf;Fk; re;ju;g;gij fUJf. ngl;bahdJ 5 rpy;Yj;njhFjpapdhy; jhq;fg;gl;Ls;sJ. 5 njhFjp rpy;Yfs; cl;gl Gifapujg;ngl;bapd; nkhj;j epiw 4 × 104𝑘𝑔 MFk;. Gifapuj rpy;ypd; Miu rpy;ypd; cl;gFjpapypUe;J ntspNehf;fpr; nry;y Fiwe;J nry;tij gpd;tUk; tupg;glk; fhl;Lfpd;wJ. mr;rhdJ rpy;Yfs; A , B apd; ikaj;jpy; epiyahfg; gpizf;fg;gLs;sJ. (a) i. Neu;ghij topNa Gifapujr; rpy;Yfs; tOf;fhJ cUz;L nry;Yfpd;wd. ,jd;NghJ rpy;Yfspd; gad;gL tpl;lk; 0.4m vdpd; Gifapujg; ngl;b 36kmh-1 vd;Dk; Ntfj;Jld; Neu;g;ghijapy; nry;Yk; NghJrpy;Yfspd; Nfhz Ntfk; ahJ? ii. ngl;bapd; epiw midj;J rpy;YfspdhYk; rkdhf jhq;fg;gl;Ls;sJ vdf; nfhz;L jz;lthsj;jpdhy; rpy;nyhd;Wf;F toq;fg;gLk; kWjhf;fj;ijf; fhz;f.

(b) i. rpy;Yj;njhFjp tupg;glj;ij tpilj;jhspy; tiue;J fhl;ba tyg;gf;f jpUk;gypd; NghJ jz;lthsj;jpdhy; rpy;Yfs; A , B apy; jhf;Fk; tpirfisf; Fwpj;Jf; fhl;Lf. .(cuha;T tpirfisg; Gwf;fzpf;f.) ii. fhl;bathwhd tyg;gf;fj; jpUk;gypd; NghJ rpy;Y B cld; ,izf;fg;gl;l tpw;RUspd; ePsj;jpw;F ahJ epfOk;?

(c) 36 kmh-1 Ntfj;Jld; jpzpT ikaj;jpw;fhd tisthiu 10m I nfhz;l tisit Gifapujk; flf;Fk; re;ju;g;gj;ijf; fUJf. tpdh (a)(ii) ,y; cs;s Nfhz Ntfk; KO ,af;fj;jpw;Fk; khwtpy;iy vdf; nfhs;f) i. rpy;Yfs; A , B apd; Vfgupkhzf; fjpfisf; fhz;f. ii. rpy;Yj;njhFjp jdJ mr;Rg;gw;wpa Nfhz Ntfj;ij khw;whky; vt;thW rpy;Y A , B apd; Vfgupkhzf; fjpf;F ntt;NtW ngWkhdq;fisg; ngw KbAk;? iii. jpUk;gypd; NghJ rpy;Y A , B apy; jz;lthsj;jpdhy; toq;fg;gLk; kWjhf;fj;jpd; gUkDf;F ahJ epfOk;? iv. ,j; jpUk;gypd; NghJ xU rpy;Yj;njhFjpapy; jhf;Fk; tpirfspd; fpilf;$Wfspd; tpisAspd; gUkd; ahJ? (d) Gifapujg; ngl;b tistpy; jpUk;gp Neu;g;ghijapy; nry;y Muk;gpf;Fk; NghJ ghijapy; cWjp epiyf;F tuKd; gy

,J hunting oscillation miyTfis Mw;Wk; vdg;gLk;. i. ,t; miyT tPr;rj;ij Fiwg;gjw;fhd topKiw xd;iwj; jUf.

i i.rpy;ypd; tbtj;ij tl;lj;jl;L tbtj;jpy; itj;jpUg;gpd; tisit ruptu flf;f ,ayhnjd xUkhztd; $Wfpd;whd;. ,f;$w;Wld; ePu; cld;gLfpd;wPuh? fhuzk; jUf.

(2019 /ess/ new/old)

06.

(a)

Gupapilj;J}uk; 1mm MfTs;s 5mm MiuAila GupahzpkPJ 8mm jbg;Gila el;L, GupahzpnghUj;jg;gl;Ls;s RtupypUe;J 2cm ,Ys;sijg;glk; fhl;LfpwJ.

i. el;L> RtupilNa cs;s Gupfspd; vz;zpf;if ahJ?

ii. el;L Rtiuj;njhlr;nra;tjw;fhd khwhr;Row;rp mjpHntz;Zld; Row;wg;gLfpwJ. el;L Rtiu kl;Lkl;lhfj; njhl 10S Neuk; vLj;jpUg;gpd; Row;rp mjpHntz; rpm ,y; ahJ?

iii. ,jd; NghJ Gupfs; el;bw;F cuha;T KWf;fk; Ʈb [ toq;Ffpd;wd. Nkw;$wpathW el;bid efHj;j 0.01Nm vDk; KWf;fk; toq;fNtz;bapUg;gpd; cuha;T KWf;fk; τb [f; fhz;f?

(b) GupRtiuj;njhl;lgpd; ,Wf;fg;gLtijf; fUJf.

i. cilahtz;zk; Gup xd;wpdhw; jhq;ff;$ba caHtpir 200N MFk;. ,Wf;fypd; NghJ RtH el;L ,ilNa ,Uf;fj;jf;f caH kWjhf;fk; ahJ?

ii. ,Wf;fg;gLjw; nraw;ghl;by; Fwpj;j fzepiyapy; RtH el;L ,ilapyhd kWjhf;fk; 1000N MfTs;sJ. ,e;epiyapy; Gup> el;L ,ilapyhd kWjhf;fk; fhuzkhf GupahdJ el;L kPJ Ʈb ,w;F Nkyjpfkhf Ʈt vDk; cuha;T KWf;fj;ijAk; toq;Fk;. el;L> Gup ,ilahd ,af;ftpay; cuha;Tf;Fzfk; 0.8 Mapd; Ʈt ahJ?

iii. el;L> RtH ,ilNa Fwpj;j fzj;jpd; NghJs;s cuha;T KWf;fk; 5.99 Nm vdpd; ,Wf;fiyNkw;nfhs;s el;bd; toq;fNtz;ba ,opT KWf;fk; ahJ?

(c) NkNy fzpf;fg;gl;l KWf;fkhdJ el;bw;Ff;fPo; fhl;ba rhtp %yk; toq;fg;gLfpwJ. el;L 2cm gf;f ePsKila mWNfhzp tbthdJ. el;L> Gupahzp xNu ikaj;ijf; nfhz;ld.

i. toq;fNtz;ba tpir F If; fzpf;f?

ii. ,Nj Gupahzp> el;Lj;njhFjpf;fhf toq;fNtz;ba tpir F [ NkYk; Fiwf;f Nkw;nfhs;sj;jf;f eilKiw xd;W jUf?

iii. el;bd; kPJ rhtpahdJ fhl;ba ,UKidfspy; khj;jpuk; fhl;bathW ,U tpirfis toq;Ffpd;wJ. ,t; tpirfs; F1, F2 I fhz;f.

iv. el;bd; KidahdJ kOq;fhky; mDgtpf;fj;jf;f caHtpir 520N MFk;. ,r;re;jHg;gj;jpy ;Kid kOq;fbf;fg;gl tha;g;Gs;sjh? fhuzk; jUf?

v. ,g;gpur;rpidiaj; jtpHf;f rhtpia vq;fdk; jpwDs;s tpjj;jpy; gad;gLj;JtPu;?

(d) el;bid ,Wf;f toq;fNtz;ba KWf;fj;ij ,optsthf;f Ntz;bAs;sJ. ,jw;fhf Kd;itf;fg;gLk; gpd;tUk; eilKiwfspy; rupahdtw;iwj; njupT nra;f.

A - jbg;Gf;$ba el;ilg;gad;gLj;jy;

B - el;L> RtupilNa mOj;jkhd ,wg;gH thrH xd;iwg; gad;gLj;jy;

C - mfyk; $lthf cs;s el;ilg;gad;gLj;jy; D - el;L> Gup ,ilahd cuha;Tf;Fzfk; FiwthAs;s el;ilg; gad;gLj;jy;.

(2018/Essay)

07. (a) (i) clnyhd;wpd; rlj;Jtj;jpUg;gk; vd;gjd; fUj;ij tpsf;Ff.

(ii) jug;gl;l clnyhd;wpw;F rlj;Jtj;jpUg;gj;jpw;F Fwpj;j ngWkhdk; fhzg;gLtjpy;iy. ,jw;fhd fhuzk; ahJ? (iii) tpiwj;j clnyhd;W mr;nrhd;iwg; gw;wp NfhzNtfk; 𝜔 cld; Roy;fpd;wJ. mt;

mr;irgr gw;wp clypd; rlj;JtjpUg;gk; I MFk.;clypd; Row;rp ,af;frf;jp 1

2I𝜔2

vdff;hlL;f.

(b) fPNo jug;gl;l glk; jd;dpaf;f ryit ,ae;jpuj;ij fhl;Lfpd;wJ. tpdhthdJ Row;rpiaAk;>

cyu;j;jiyAk; gw;wpajhFk;.

(i) RikNaw;wg;gl;l RoYk; cUis Xa;tpypUe;J 13 Row;rpfs;/nrf;fd; vDk; Row;rp fjpia mila 5.0 s vLf;fpd;wJ. ePUld; Nrue;;J RikNaw;wgg;l;l cUisapd; rljJ;tj;jpUg;gk; 0.90 kgm2 MFk;. rlj;Jtj;jpUg;gk; njhlu;e;J khwpyp vd fUjp gpd;tUtdtw;iwf; fzpf;f. 1. ruhrup Nfhz Mu;KLfy;.

2. ruhrup KWf;fk; 3. ,Wjp Row;rp ,af;frf;jp 4. ,Wjp Nfhz ce;jk;.

(ii) Nkhl;lhupdhy; Muk;gj;jpy; cUisf;F gpuNahfpf;fg;gl;l KWf;fk; cau; ngWkhdji;jAilaJ. mjd;gpd;mJ Fiwtile;J Xu; khwhg; ngWkhdj;ij milAk.; ,t; khwh KWf;fk; fhuzkhf cUis Kbtpyp Neuj;jpw;F Mu;KLf KbahjpUg;gjw;fhd fhuzj;ij tpsf;Ff. (iii) Row;rp Kbtile;jgpd; cyu;j;jy; eilngWk;. ,jw;F 2.0 kW ntg;gkhf;fpAk;> xLq;fpa ePuhtpia mfw;w xU gk;gpAk; gad;gLk;. ruhrupahd Riknahd;W 1.5 kg ePiu ,r;nrad;Kiwapy; ,of;Fk;. 100 °C ,y; Mtpahjypd; jd;kiwntg;gk; 2.3 MJkg-1 MFk;.

1. 100 °C ,y; ePupd; cau; Mtpahjy; tPjj;ijf; fzpf;f. 2. 100 °C ,id miltjw;F vLj;j Neuj;ij Gwf;fzpj;J cyu;j;Jtjw;F vLf;Fk; ,opT Neuj;ijf; fhz;f.

(2016/Essay)