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- Λάρισα Τρικούπης
- 6 χρόνια πριν
- Προβολές:
Transcript
1 FWC juk; :- 2 (206) aho;. tyaf; fy;tpj; jpizf;fsj;jpd; mdruizald; njhz;ilkhdhw ntspf;fs epiyak; elhj;jk; Field Work Centre jtizg; gupl;ir> A+iy Term Examination, July- 205 mwptwj;jy;fs; : vy;yh tpdhf;fsf;fk; tpil juf. ckj Rl;nlz;iz tpilj;jhspy; vojf. kpfr; rupahd tpilfsf;f ckj tpilj;jhspy; Gs;sb (X),Lf.. Nfhz ce;jj;jpd; gupkhzk; gfjp - I ) MLT - 2) ML 2 T -2 3) ML 2 T - 4) ML - T - 5) ML -2 T - 2. xu fy;yhdj GtpaPu;g;gpd; fpo; epiyf;fj;jhf Nky;Nehf;fp vwpag;glfpd;wj> gpd;tuk; fzpaq;fspy; mjpaau; Gs;spapy; mtw;wpd;,af;fj;jpir Gwkhw;wkiltJ A) Ntfk; B),lg;ngu;r;rp C) Mu;KLfy; ) (A) kl;lk; 2) (C) kl;lk; 3) (A) Ak; (B) kl;lk; 4) (A) Ak; (C) kl;lk; 5) (A), (B), (C) vy;yhk; 3. xspapay; Clfj;jpd; KwpTr;Rl;b (n) cld;> xsp miyapd; miyepsk; khw;wkiltij jpwk;glf;fhl;lk; tiug ngsjpftpay; () (2) (3) (4) (5) 4. xd;nwhl xd;w njhlifapys;s xu FtpT tpy;iyiaak;> xu FopT tpy;iyiaak; rpwpa J}uj;jhy; NtWgLj;Jk; NghJ mtw;wpd; Nru;khdf; Ftpaj;J}uk;> ) FiwAk; 2) mjpfupf;fk; 3) G+r;rpakhFk; 4) KbtpypahFk; 5) khwhky;,uf;fk; 5. rkepsks;s xukid %ba Xfd; FohAk;> jpwe;j Xfd;FohAk; mbg;gilr;ruj;jpy; xj;jpirf;fg;glk; NghJ nrf;fdf;f 2 mbg;gf;fs; Nfl;fpd;wd. jpwe;j Fohapd; epsj;ij miuklq;fhf;fp> %ba Fohapd; epsj;ij,uklq;fhf;fpak; mbg;gilr;ruj;jpy; xj;jpirf;fr; nra;ag;glk; NghJ Nfl;Fk; mbg;gf;fspd; vz;zpf;if Neuk; : kzpj;jpahyk; ) 2 2) 5 3) 6 4) 7 5) 8 juk; - 2 (206) - A+iy ngsjpftpay;
2 6. xu glfhdj Mw;wpd; jpirapy; nry;yk; NghJ xu Fwpg;gpl;l J}uj;ijf; flf;f vlf;fk; Neuk; 6 kzpj;jpahyk; MfTk; Mw;wpd; jpirf;f vjpuhf glf nry;yk; NghJ mf;fwpg;gpl;l J}uj;ij flf;f vlf;fk; Neuk; 0 kzpj;jpahykhftk;,ug;gpd; mg;glfhdj epiyahd epupy; mj;j}uj;ij flf;f vlf;fk; Neuk; ) 6.5 kzpj;jpahyk; 2) 8 kzpj;jpahyk; 3) 9 kzpj;jpahyk; 4) 7.5 kzpj;jpahyk; 5) 8.5 kzpj;jpahyk; 7. Mfha tpkhdnkhd;w khwhf; fjp V,y; fpilahf gwe;j tz;zk; jpuk;gk; NghJ mjpy; jhf;fk; tpisas; tpir> gpd;tuk; vt; tpirfspd; tpisas; Mf,Uf;Fk;? (A) cau;j;jk; tpir (B) mjd; epiw (C) jil tpir ) (A) kl;lk; rup 2) (B) kl;lk; rup 3) (A), (B) kl;lk; rup 4) (A), (C) kl;lk; rup 5) (A), (B), (C) vy;yhk; 8. xu gy}dpdjk; mjd; cs;slf;fj;jpdjk; jpzpt M Mf cs;snghj gy}dhdj rpuhd Mu;KLfy; a cld; fpo; Nehf;fp,wq;FfpwJ. cs;slf;fj;jpypue;j vt;tst jpzpt tpltpf;fk; NghJ gy}dhdj mnj rpuhd Mu;KLfy; a cld; Nky; Nehf;fp,aq;Fk;. (gy}dpd; fdtst khwtpy;iy vdf; nfhs;f.) ) 2a g+a M 2) 2a g a M 3) a g+a M 4) g g+a M 5) 2g g+a M 9. 30cm,ilj;J}uj;jpy; cs;s 20cm, 0cm Ftpaj;J}uKila nky;ypa FtpT tpy;iyfspy; 20cm Ftpaj;J}uKila tpy;iyf;f Kd;dhy; 40cm J}uj;jpy; nghus; cs;sjid cu fhl;lfpd;wj.,wjp tpk;gk; Njhd;WtJ ),uz;lhtj tpy;iyf;f tyj gf;fj;jpy; 5cm J}uj;jpy; 2),uz;lhtJ tpy;iyf;f tyj gf;fj;jpy; 3.3cm J}uj;jpy; 3),uz;lhtJ tpy;iyf;f tyj gf;fj;jpy; Kbtpypapy; 4),uz;lhtJ tpy;iyf;f,lj gf;fj;jpy; 3.3cm J}uj;jpy; 5),uz;lhtJ tpy;iyf;f,lj gf;fj;jpy; 00cm J}uj;jpy; 0. 30cm miy epsks;s tpuj;jpaiyapd;> 60 0 mtj;ij tpj;jpahrj;jpy; cs;s,u Gs;spfSf;fpilapyhd,opTj;J}uk; ) 5cm 2) 0cm 3) 5cm 4) 20cm 5) 7.5cm. ghu;itf; Fiwghl;bw;F ghtpf;fg;glk; %f;ff; fz;zhb tpy;iyapdhy; cuthf;fg;glk; tpk;gk; ) cz;ikahdj> jiyfpohdj 2) cz;ikahdj> epkpu;e;jj 3) khakhdj> jiyfpohdj 4) khakhdj> epkpu;e;jj 5) Fiwghl;il nghwj;jj 2. xu ypw;wu; FLitahdJ rpwpjst,urj;ij nfhz;ls;sj. FLitapy; cs;s tspapd; fdtst ntg;gepiy khw;wj;jld; khwhj,uf;f fhzg;gl;lj. fz;zhbapd; eps tpupifjpwd; 9 x 0-6 / C, MfTk;,urj;jpd; Kg;gupkhz tpupifjpwd;.8 x 0-4 / C) MfTk;,Ug;gpd;> FLitapYs;s,urj;jpd; fdtst ) 20 cm 3 2) 50 cm 3 3) 225 cm 3 4) 300 cm 3 5) 450 cm 3 juk; - 2 (206) - A+iy ngsjpftpay;
3 3. xypaiyfs; Kidthf;fkila khl;lhj. Vnddpy;,it ) nghwpkiw miyfs; 2) nry;tjw;f Clfk; Njit 3) eps;gf;f miyfs; 4) FWf;fiyfs; 5) Fiwe;j NtfKilaJ 4.,U Jzpf;iffSf;F,ilapyhd kps;jd;ik NkhJifapd; NghJ fhg;giltj ) xt;nthu Jzpf;iffspd; ce;jk; 2) xt;nthu Jzpf;iffspd; fjp 3) xt;nthu Jzpf;iffspd;,af;f rf;jp 4),U Jzpf;iffspd; nkhj;j rf;jp 5),U Jzpf;iffspd; nkhj;j,af;f rf;jp 5. A, B vd;dk;,u Fw;wpfs; cutpy; fhl;baj Nghy; moj;jkhd fpilg;gug;gpd; kpj itf;fg;gl;l tpirkhwpyp 00Nm -, cila,nyrhd tpw;ruspdhy;,izj;j> Fw;wp B,d; kpj 2N fpiltpiria gpunahfpf;fk; NghJ,U Fw;wpfSk; rk fjpfsld;,aq;fnkdpd;> tpw;ruspy; Nrkpf;fg;gLk; rf;jp ) 48x0-2 J 2) 6x0-2 J 3) 8x0-2 J 4) 4x0-2 J 5) 0 6. M jpzptila xu Jzpf;ifahdJ X - mr;r topna V vd;dk; fjpald;,aq;fp> Xa;tpYs;s 2m jpzptila,uz;lhtj Jzpf;ifAld; NkhJfpd;wJ. Nkhjypd; gpd; KjyhtJ Jzpf;if Xa;Tf;F tu>,uz;lhtj Jzpf;if,U rk jpzpts;s Jz;Lfshf cile;j X mr;rld; rknfhzk; θ > 0 mikj;j cutpy; fhl;bathw,aq;ffpd;wj. gpd;tuk; $w;wf;fspy; cile;j Jz;Lfspd; Ntfk; gw;wp rupahff; Fwpg;gpLtJ ) xt;nthu Jz;Lk; fjp v cld;,aq;fk; 2) xu Jz;L fjp v cldk;> kw;iwa Jz;L v I tpl Fiwe;j fjpald;,aq;fk; 3) xt;nthu Jz;Lk; fjp v/2 cld;,aq;fk; 4) xu Jz;L fjp v/2 cldk;> kw;iwa Jz;L v/2 I tpl $ba fjpald;,aq;fk; 5) xt;nthu Jz;Lk; v/2 I tpl $ba fjpald;,aq;fk; 7. jpurpakhdpapd; nrg;gq;nra;if gw;wpa gpd;tuk; $w;wf;fspy; rupahdj / rupahdit A) rkhe;ju fjpu;fis ngwj;jf;fjhf njhiyfhl;b nrg;gq;nra;ag;glk; B) rkhe;ju fjpu;fis ntspnaw;wj;jf;fjhf Neu;tupirahf;fp nrg;gq;nra;ag;glk; C) njhiyfhl;bapd; Row;wp mr;rf;f rkhe;jukhf mupaj;jpd; KwpT Xuq;fs;,Uf;fj;jf;fjhf mupankir kl;lq;nra;ag;glk; ) (A) kl;lk; rup 2) (B) kl;lk; rup 3) (A), (B) kl;lk; rup 4) (A), (C) kl;lk; rup 5) (A), (B), (C) vy;yhk; rup Nkhjypd; Kd; Nkhjypd; gpd; juk; - 2 (206) - A+iy ngsjpftpay;
4 8. nrtpg;giwapd; FWf;Fntl;Lg; gug;g 2mm 2 MfTs;s egu; xutupd; xypr;nrwptkl;l mjpu;ntz; tiug fpno fhl;lg;gl;ls;sj.,e;egu; 00 Hz mjpu;ntz; xypia Nfl;Fk; NghJ nrtpg;giwapy; glk; xypapd; ty ) 2 x0-2 W 2) 2 x0-2 W 3) 6 x0-2 W 4) 2 x0-6 W 5) 6 x0-2 W 9. Xu; clypy; jhf;fk; khwhtpir F,d; $Wfs; F x = 3N, F y = 4N tiugpy; fhl;lg;gl;ls;sj. mt; clyhdj Gs;sp P (x = 2m,y = 6m),y;,Ue;J Gs;sp Q (x = 4m, y = m),w;f mirak; vdpd; mt;tpirapdhy; cly;kpj nra;ag;gl;l Ntiy ) 6J 2) 30J 3) 46J 4) 56J 5) 65J ) G+r;rpak; 2) KOikahf,af;fr;rf;jp 3) KOikahf kps;jd;ik moj;jrf;jp Intensity level/db ) gfjpahd,af;frf;jpak;> gfjpahd kps;jd;ik moj;j rf;jpak; 5) rup miu gq;f,af;frf;jpak;> kpfjp miugq;f moj;jrf;jp Frequency/Hz Nthy;w;khdpnahd;wpdJ fhl;bapd; jpuk;giy cu fhl;lfpd;wj. fhl;bapd; thrpg;igak;> cau; kjpg;gpl;l toitak; KiwNa rupahf Fwpg;gpLtJ ) 2.0V, 0.2V 2).9V, 0.2V 3) 2.0V, 0.V 4).9V, 0.V 5).8V, 0.V juk; - 2 (206) - A+iy ngsjpftpay; y F y P F x Q vjpu; jpirapy; 4cms - fjpald;,aq;fk;,u ru;trkkhd Jbg;Gf;fs; Kjypy; 6cm,ilj;J}uj;jpy; cs;sij cu fhl;lfpd;wj. 2s Neuj;jpd; gpd;du; Jbg;Gf;fspd; nkhj;j rf;jp x
5 22. miw ntg;gepiyapys;s A, B vd;dk; cnyhfnfhy;fs; xd;whf ntg;gg;glj;jg;glfpd;wd. mtw;wpd; mjpfupf;fk; ntg;gepiy Δl A Δθ,w;Fk; tpupt Δl,w;Fkpilapyhd khw;wj;ij tiug fhl;lfpd;wj. A, B cnyhf Nfhy;fs; gw;wpa gpd;tuk; $w;wf;fis fujf. B (A) A,d; eps tpupif jpwd;> B I tpl $lthfk; (B) A,d; epsk; B I tpl $LjyhFk; (C),U Nfhy;fspdJk; epstpupifjpwd; X Muk;g epsk; nguf;fk;,u Nfhy;fSf;Fk; rkk; vdpd;,u tiugfsk; xd;nwhl xd;w nghue;jk;,f;$w;wf;fspy; ) (A) kl;lk; rup 2) (C) kl;lk; rup 3) (A), (B) kl;lk; rup 4) (A), (C) kl;lk; rup 5) (A), (B) (C) vy;yhk; rup V khwh fjpald;> khwh mjpu;ntz; f o,y; xypia vog;gpathw AB topna,aq;fk; Kjy; xd;iw cu fhl;lfpd;wj. xyp miyapd; Ntfk; V MFk;. epiyahd mtjhdp O AB,,y;,Ue;J rw;w tpyfp cutpy; fhl;baj Nghy;,Ug;gpd; mtjhdpahy; czug;glk; Njhw;w mjpu;ntz; f,d; khwiy rpwe;j Kiwapy; fhl;ltj f f A O B () (2) (3) f A O B (4) (5) f A O B A 0 O A O B A O B f B Δθ juk; - 2 (206) - A+iy ngsjpftpay;
6 24. M jpzptila gpshj;jpf;f jpz;kkhdj mjd; cs;ns nghs;ntspia nfhz;ls;sj.,jid epupy; kpjf;fr; nra;j NghJ mjd; fdtstpy; miugq;f epupy; mkpo;e;j kpjg;gij cu fhl;lfpd;wj. epupdjk;> gpshj;jpf;fpdjk; mlu;j;jpfs; KiwNa d, ρ MFk;. nghs;ntspapd; fdtst 25. ) m( 2 ) d ρ 2) m( 2 ) ρ d 3) m( 2 ) d ρ 4) m( 2d ρ 5) 2m( ) d ρ v cutpy; fhl;lg;gl;lthw v vd;dk; Muk;g fpil Ntfj;Jld; fulhd fpilj;jsk; topna eothky; cus tplg;gl;l rpy;yhdj rpy Row;rpfis Mw;wp Xa;tpw;F tufpd;wj. Neuk; (t) cld; Gtp njhlu;ghfr; rpy;ypd; Rw;wstpd; kpj cs;s Gs;sp X,d; Ntfk; (v ),d; gukdpd; khwiyg; gpd;tuk; tiugfspy; vj kpfr; rpwe;j tpjj;jpy; tiff;fwpf;fpd;wj? (t = 0,y; Gs;sp X rpy;ypd; mjpaau; Gs;spapy; cs;sj) t t () (2) (3) v v v X v t 0 0 t (4) t (5) juk; - 2 (206) - A+iy ngsjpftpay;
7 FWC juk; :- 2 (206) aho;. tyaf; fy;tpj; jpizf;fsj;jpd; mdruizald; njhz;ilkhdhw ntspf;fs epiyak; elhj;jk; Field Work Centre jtizg; gupl;ir> a+iy Term Examination, July gfjp II (A) mikg;gf; fl;liu tpdhf;fs; ehd;f tpdhf;fsf;fk;,j;jhspnyna tpil vojf. g = 0Nkg -. jpug;gf;nfhl;ghl;il cgnahfpj;j fz;zhbapd; mlu;j;jpiaj; Jzptjw;fhf gpd;tuk; cug;gbfs; ckf;f jug;gl;ls;sd. 4cm gf;f epsk; nfhz;l fz;zhb rjukfp Fw;wp>,jd; jpzpt fpl;lj;jl;l 60g (M) 20g, 50g, 00g epiwg;gbfs; (M) kpw;wu;nfhy;> Ez;khdpj; jpuf;fzpr;rp> Ntzpau;,Lf;fpkhdp fj;jptpspk;g> E}y;Jz;Lfs; epu; nfhz;l Kfit> jputj;ij nfhz;l Kfit (a) (i) rjukfpapd; gf;f epsk; (a) I %,,Yk; $ba nrk;ikald; msg;gjw;fj; jug;gl;l mstpl;l cgfuzq;fspy; vjidg; gad;glj;jtpu;? (ii) kw;iwa,u mstpl;l cgfuzq;fis njupt nra;ahjjw;fhd fhuzk; ahj? (b) (i) fj;jp tpspk;gpy; rkepiyg;glj;jg;gl;l kpw;wu;nfhiy cgnahfpj;j M I fhz;gjw;fhd ngaupl;l tupg;glj;ij tiuf. M, m vd;gd fj;jp tpspk;gpy;,ue;j l, l J}uq;fspy; cs;sd. ngsjpftpay; (ii) kpw;wu; Nfhypd; GtpaPu;g;G ikaj;ij vt;thw fhz;gpu;? (iii) kpw;wu;nfhiy mjd; GtpaPu;g;G ikaj;jpy; rkepiyg;glj;jtjpy; cs;s md$yk; ahj? juk; - 2 (206) - A+iy ngsjpftpay; - (A)
8 (c) (i) NkNy jug;gl;l epiwg;gbfspy; vj,g;gupnrhjidia nra;a cfe;jjhfk;> ckj njuptpw;fhd fhuzk; epiw :... fhuzk;:... (ii) M,w;fhd Nfhitia m, l, l rhu;gpy; vojf... (d) (i) kpw;wu;nfhypd; fz;zhb rjukfpapd; epiyia khw;whj fz;zhbapd; mlu;j;jpia ( d g) Jzptjw;fhd gupnrhjidg; gbfisf; Fwpg;gpLf. (ii) epu; mstplk; mstpl ahj? l 2 vdf; nfhs;f. (e) fz;zhbapd; mlu;j;jp ( d g ),,w;fhd Nfhitia epupd; mlu;j;jp ( d w), l 2, l (my;yj l ) rhu;gpy; ngwf. (f) khztd; xutd;,g;gupnrhjidapd; l = 4cm, l = 49cm, l 2 = 35cm, vd ngw;whd;> epu;> jputj;jpd; mlu;j;jpfs; KiwNa 000 kgm -3, 900kgm -3 vdpd; fz;zhbapd; mlu;j;jpiaf; fhz;f. 2.,irftnuhd;wpd; mjpu;ntz;iz mwpa> khztd; xutd; Rukhdpg; gupnrhjidia xoq;f nra;fpd;whd;. (a) (i) mtd; gupitg; ngw mjpuk;,irf;ftiu vq;nf itf;f Ntz;Lk;? (ii) mjpuk;,ioapy; Njhd;Wk; miy tpuj;jpaiyah / epiyahd miyah> FWf;fiyah / eps;gf;f miyah? juk; - 2 (206) - A+iy ngsjpftpay; - (A)
9 (iii) ghyq;fsf;f,ilapy; mjpuk;,ioapd; tpr;rk; mjd; epsj;jld; khwtij fhl;lk; tiuig tiuf. (mbg;gil> Kjyhk; Nkw;nwhdpia fujf> mbg;gil gupt epsk; l0 vdf; nfhs;f.) (b) mbg;gil gupt epsj;ijg; ngwtjw;fhd nra;kiw gbfis juf. (c) khztd; mse;j mbg;gilg; gupt epsk; (l o) MfTk; Rukhdpf; fk;gpapys;s,otpir (T) MfTk; fk;gpapd; myf epsj;jpzpt (m) MfTk;,Ug;gpd; mbg;gil gupt mjpu;ntz;zpw;fhd Nfhitia l o, T, M,d; rhu;gpy; vojf. (d) jw;nghj khztd;,g;gupnrhjidia Nru;j;jp cuf;ff; fk;gp AB, BC cld; xoq;f nra;jhd;. A, C ghyq;fis njhlk; Gs;spahfTk;> AB:BC = 3:2 MfTk; AB,d; tpl;lk; BC I Nghy;,Uklq;FilajhfTk; cs;s NghJ mnj,irftupw;f,u fk;gpfspyk; gupt epiy ngwg;glfpd;wj. mj;jld; B,y; fz Njhd;Wfpd;wJ. (i) 0 AB, BC,y; gupt epiyapy; Njhd;Wk; jlq;fspd; vz;zpf;if KiwNa n,n 2,w;fhd Nfhitfis vojp n n2 tpfpjj;ijf; fhz;f. (ii),u fk;gpfspyk; Njhd;Wk; jlq;fspd;,opt vz;zpf;ifiaf; fhz;f. AB:.. BC:.. (iii) AC = m vdpd; fk;gp BC,y; Njhd;Wk; cau; miyepsk; ahj? (e) fk;gp BC,d; myf epsj;jpzpt x 0-3 kgm - MfTk;,ioapYs;s,Otpir 40N MfTk;,Ug;gpd;,irftupd; mjpu;ntz;izf; fhz;f. juk; - 2 (206) - A+iy ngsjpftpay; - (A)
10 3. (a) A, B vd;dk;,u tpy;iyfisg; glk; fhl;lfpd;wj. (ii) gfjp (a) (i),y; ckj njuptpw;fhd fhuzj;ij tpy;iyapd; Ftpaj;J}uk; rhu;ghf tpsf;ff. (b) tpy;iyfs; A, B,d; Ftpa epsq;fs; KiwNa f A, f B MFk;.,t; tpy;iyfisg; (ii) (iii) (c) ` (i) (ii) (i),tw;iwf; nfhz;l thdpay; njhiyfhl;b xd;iw mikf;f Ntz;Lk;. nghuspahftk;> ghu;itj;jz;lhftk; vt;tpy;iyfisg; gad;glj;jtpu;? nghusp ghu;itj;jz;l gad;glj;jp J}ug;nghUspd; tpk;gj;ij Nehf;fj;jf;fjhd thdpay; njhiyfhl;b,ay;ghd nrg;gq; nra;ifapy; xoq;f nra;ag;gl;lj. (i) J}ug;nghUs; nghuspapd;,lg;gf;fj;jpy; cs;snjdf; fujp> tpy;iyfspd; epiyfis njspthff; fhl;bg; ngauplf. tpy;iyfsf;fpilg;gl;l J}uj;ijf; Fwpg;gpLf. ghu;itj;jz;bypue;j> vt;tst J}uj;jpy;,Wjp tpk;gk; Njhd;Wk; NkNy $wg;gl;l nrg;gq;nra;if epiyf;f Nfhzg; ngupjhf;fj;jpw;fhd Nfhitia vojf. nghuspia xspu;thf;fp ghu;itj;jz;lhy; Vw;gLj;jg;gLk; nghuspapd; tpk;gj;ij xu jpiuapy; ngw;w mjd; tpl;lk; (d) nghuspapd; tpl;lk; (D) msf;fg;gl;lj. NkNy $wg;gl;l nrg;gq;nra;ifapy;> Nfhzg;ngupjhf;fj;jpw;fhd Nfhitia d, D rhu;gpy; vojf.,t; tpk;gj;jpd; Kf;fpaj;Jtk; gw;wp ahj $WtPu;? A B juk; - 2 (206) - A+iy ngsjpftpay; - (A)
11 (d) tpy;iyfsf;fpilg;gl;l J}uk; (x) khw;wg;gl;l mjw;f xj;j tpk;gj;jpd; tpl;lk; (d) msf;fg;gl;lj. 4. x,w;fk; d,w;fk;,ilapyhd njhlu;ig vojf. (e) /d vjpu; x tiugpd; gukl;lhd tbtj;ij tiuf. (f),t; tiugpd; x mr;rpys;s ntl;lj;jz;bd; kl;lg;ngwkhdk; vijj; juk;? l,wff; Fohiag; gad;glj;jp tspkz;ly mkf;fj;ij Jzptjw;fhd gupnrhjid xoq;fikg;ig cu fhl;lfpd;wj.,jpy; xu Kid %lg;gl;l,wff; FohapDs; tsp epunyhd;w,ur,ioapdhy; milf;fg;gl;l Foha; rha;thf itf;fg;gl;ls;sj. (a),ur epuiy,wff; FohapDs; vt;thw cl;gfj;jtpu;? L (b) cutpy; fhl;lg;gl;l Fohapd; rha;thd epiyapy; milgl;l tspapd; fdtst (V) mkf;fk; (P),w;fhd Nfhitfis vojf. tspkz;ly mkf;fk; π cm Hg,wFf; Fohapd; FWf;Fntl;Lg; gug;g (a) vdtk; nfhs;f. h juk; - 2 (206) - A+iy ngsjpftpay; - (A) H
12 (g) (c),g;gupnrhjidia Nkw;nfhs;s epu; vlf;fk; thrpg;gf;fs; ahit? (d) P, V,w;F gfjp (b),,y; vojpa Nfhitfisg; gad;glj;jp P, V,w;F,ilapyhd njhlu;ig vojf. njhlu;gpys;s Nkyjpf fzpaq;fis,dk; fhz;f. (e) NkYs;s Nfhitia Neu;Nfhl;L tiugpw;f Vw;g kpnshoq;fglj;jf. (rhuhkhwpia x mr;rpy; Fwpf;f. (f) vjpu;ghu;f;fg;glk; tiuig gukl;lhf tiuf. mr;rf;fis njspthfg; ngauplf. khztd; xutd; π,,d; ngwkjpia fhz;gjw;fhf NkYs;s tiuig tiue;j tiugpd; gbj;jpwd;.64 x 0-4 cm - (Cm Hg) -. vdtk; ntl;lj;jz;l 0.05 cm - vdtk; mwpe;jhd;. (i) h= 0cm, L= 40cm and.64 vdpd; π,dj ngwkjpiaf; fhz;f (ii) Foha; fpilahf itf;fg;glk; NghJ> FohapDs; milgl;l tsp epuypd; epsk; ahj? (iii) (iv) FWfpa,ur epuiyg; gad;glj;jp,g;gupnrhjidia ntw;wpfukhf nra;a KbAkh? ckj tpilia tpsf;ff. l,w;f vjpuhd H,d; gukl;lhd tiuig ( - L H +L ) vd;dk; tpr;rpy; tiuf. juk; - 2 (206) - A+iy ngsjpftpay; - (A)
13 FWC ) juk; :- 2 (206) aho;. tyaf; fy;tpj; jpizf;fsj;jpd; mdruizald; njhz;ilkhdhw ntspf;fs epiyak; elhj;jk; Field Work Centre jtizg; gupl;ir> A+iy Term Examination, July gfjp II (B) VjhtJ,U tpdhf;fsf;f kl;lk; tpil juf. mr;r jiyikkryj;jpd; FWf;F ntl;lg; gug;g JizKryj;jpd; FWf;F ntl;lg;gug;g jlg;gf;fk;gp jputk; (jlg;gj; jz;l) RoYk; jlg;gj;jl;l xl;bdupd; ifapdhy; toq;fg;glk; tpir ngsjpftpay; kiynawf;$ba irf;fps; xd;wpd; epupay; jlg;gj; njhfjpia cu fhl;lfpd;wj.,j #oyk; jlg;g jl;il epw;ghl;lj;jf;fjhfk;. Gs;sp B,y; jlg;g fk;gp (Brake lever) kpj mjw;f nrq;fj;jhf F b vd;dk; tpiria gpunahfpg;gjd; %yk;,j eilkiwg;glj;jg;glk;. jlg;gf; fk;gpahdj (Brake lever) O,D}lhf jhspw;f nrq;fj;jhf nry;yk; mr;rg;gw;wp RahjPdkhf Rod;W jiyik Kryj;jpd; (Master piston) kpj F vd;dk; tpiria nrq;fj;jhf gpunahfpf;fpd;wj.,jd; tpisthf cz;lhfk; mkf;fk; jlg;g jputj;jpd; ;(brake liquid) %yk;,u ru;trkkhd Jiz Kryq;fSf;F CL flj;jg;glfpd;wj. mg;nghj juk; - 2 (206) - A+iy ngsjpftpay;
14 mk;kryq;fsld;,izf;fg;gl;l jlg;g jpz;lfs; (brake pads) rpwpj J}uk; efu;e;j RoYk; jlg;gj; jl;bd;,u gf;fq;fpd; kpjk; nrq;fj;jhf moj;jfpd;wd. jiyik> Jiz Kryq;fspdJ FWf;F ntl;lg; gug;gst KiwNa 5.6 x0-5 m 2, 4.4 x 0-5 m 2 MFk;. (a) thaf;fsf;f gh];fypd; jj;jtj;ij gpunahfpf;fyhk;> Mdhy; epupay; cau;j;jpfspy; nraw;ghl;l gha;kkhf thaf;fisg; gad;glj;j KbahJ.,jw;fhd fhzj;ij tpsf;ff. (b) jputj;jpd; ve;j,ay;g mjid epupay; jlg;gf;fspy; rpwg;ghf njhopw;gl cjtfpd;wj? (c) irf;fps; Xl;bdu; jdj ifapdhy; jlg;gf;fk;gpia (Brake lever),of;fk;nghj jiyikkryj;jpdhy; (Master pistion) jputj;jpd; kpj gpunahfpf;fg;glk; mkf;fk;.5 x 0 6 Pa vdpd;> jiyik Kryj;jpdhy; jputj;jpd; kpj gpunahfpfg;glk; tpir F If; fhz;f. (d) (i) jlg;gf; fk;gpapys;s Gs;sp A,y; njhopw;glk; tpir F a,d; jpiria njspthf Fwpj;J F, F a,w;f,ilapyhd njhlu;ig vojf. (ii) F b,d; gukidf; fhz;f. (Njitahd J}uq;fs; cutpy; fhl;lg;gl;ls;sd. F, F b,w;f,ilg;gl;l nrq;fj;jj;j}uk; 8cm) (e) (i) jputj;jpdhy; Jiz Kryj;jpd; kpj cqw;wg;glk; mkf;fk; ahj? (ii) Jiz Kryj;jpd; (Slave pistion) kpj gpunahfpf;fg;glk; tpiriaf; fhz;f. (f) jlg;gj; jpz;lfsf;fk;> (brake pads) jlg;g jl;bw;fk; (Brake disc),ilapyhd cuha;tf;fzfk; 0.5 vdpd; jlg;gj; jl;bd; kpj jlg;g jpz;lfs; moj;jk; NghJ xt;nthu jpz;bd; (pads) tpisthftk; jl;bd; kpj jhf;f cuha;t tpiriaf; fhz;f. (g) rpy;yk; mjdld;,ize;j #oyk; jlg;gj;jl;lk; (spinning Brake disc) xnu mr;rpy; #oy;fpd;wd. jlg;gj; jpz;bw;fk;> RoYk; jlg;g jl;bd; mr;rpw;fk;,ilapyhd J}uk; 6cm. rpy;ypdjk;> jlg;gj;jl;bdjk; RoYk; mr;rg;gw;wpa rlj;jt jpug;gk; 0.2 kgm 2, MFk;. jlg;ig gpunahfpf;fk; NghJ rpy;yhdj sec,y; Xa;tpw;F tufpwj. (i) jlg;ig gpunahfpf;fk; NghJ RoYk; jl;by; gpunahfpf;fg;glk; cuha;t KWf;fj;ij fhz;f. (,af;fk; KOtJk; cuha;t tpir khwhky; cs;sj vdf; nfhs;f) (ii) jlg;g gpunahfpf;f Kd; rpy;ypd; Nfhzf;fjp ahj? (iii) jlg;g gpunahfpf;fg;gl;l gpd; vj;jid Row;rpfspd; gpd; rpy;y Xa;tpw;F tuk; (π = 3 vdf; nfhs;f) (iv) Xa;tpw;F tukd; Vw;gLj;jg;gLk; rpy;ypd; Row;rpfspd; vz;zpf;ifia Fiwf;f rpy;ypy; epu; vd;d khw;wj;ijr; nra;tpu;? 2) gpd;tuk; ge;jpia thrpj;j fpno Nfl;fg;gl;Ls;s tpdhf;fsf;f tpil vojf. rhjhuz kdpj fhjpdhy; 20 khz,w;fk; mjpfsthd mjpu;ntz;izf; nfhz;l xyp miyfisf; Nfl;f Kbtjpy;iy.,it fopxyp miyfs; vd miof;fg;glk;. etpd njhopw;jiwapy; nghul;fspy; cs;s FiwghLfis fz;lwpa fopxyp gad;glj;jg;glfpd;wj. fopnahyp mir gpupjy; (Ultra sound Scanning) cgfuzj;jpd; Kf;fpa $whf mkf;fkpd; %ynghuspd; tl;l tbt jl;l fhzg;glfpd;wj.,j;jl;bw;f FWf;Nf MlNyhl;l Nthy;w;wsit gpunahfpg;gjd; %yk; mjid type;j mjpuptpw;f cl;glj;jg;glfpd;wj. nghjthf MlNyhl;l kpd;kjypd; mjpu;ntz; MdJ jl;l cau; tpr;rj;jld; mjpuk; tiu nrg;gq; nra;ag;gltjd; %yk; rf;jp kpf;f fopnahypfs; gpwg;gpf;fg;glfpd;wd.,it juk; - 2 (206) - A+iy ngsjpftpay;
15 Jbg;gpd; tpr;rk; nghul;fspd}lhf nry;yk; NghJ mtw;wpd; xyp miyapd;,af;fj;ij vjpu;f;fk; Mw;wy; mt; clfj;jpw;fupa xypmiyj;jil (acoustic impedence) (Z) vd miof;fg;glfpd;wj. Z = ρc MFk;.,q;F Z Clfj;jpw;Fupa xypmiyj;jil> p - Clfj;jpd; mlu;j;jp> c Clfj;jpy; fop xypapd; Ntfk; fopnahyp miyfs; ntt;ntw Clf,ilKfq;fspy;> vy;iyfspy; gfjpahf njwpg;gilfpd;wj. tspapdj xyp miyj;jil kpf Fiwthjyhy; tsp Clf,ilKfj;jpy; xypj;njwpg;g cau;thf fhzg;glk;. fopnahypia gad;glj;jpg; nghul;fis Ma;T nra;akd; nghuspd; Nkw;gug;gpy;,izf;Fk; vz;nza; giria (Couping gel) G+rpa gpd;dnu fopnahypis gpwg;gpf;fk; cgfuzj;ij khwflj;jpia mjd; Nky; itf;f Ntz;Lk;.,jdhy; mjpfst fopnahypapd; rf;jp Ma;Tf;Fl;gLj;jg;gLk; nghuspds; nry;yk;. Clf,ilKfj;jpy; xyp njwpg;gf; Fzfk; R gpd;tukhw jug;glk;.,q;f Z - Clfk;,d; xypmiyj;jil Z 2 Clfk; 2,d; xyp miyj;jil R = [ Neuk; : [ Z2 Z] [ Z + Z2] ]2 Transducer jd;dfj;nj FiwghLfis nfhz;l nghus; kpj khw flj;jpahdj (Transducer probe) fopnahyp Jbg;Gf;fis nryj;jp ntt;ntw Clf,ilKfq;fSf;F nrd;w kpsj;njwpg;gile;j> kpz;lk; khwflj;jpia mile;j Neuj;ij fzpg;gjw;fhd gjptfs; fnjhl;lf;fjpu; mitt fhl;bapy; fhl;rpg;glj;jg;gl;ls;sij cu fhl;lfpd;wj. NtW Ma;T KiwfSld; xg;gplk; NghJ> fopnahyp Ma;T KiwahdJ nghuis (Clfj;ij) ghjpf;fhj> jpq;fw;wj> tpidj;jpwd; $baj> Neuj;ij kpr;rg;glj;jf; $bajhfk;. (a) (i) fopxypapd; mjpu;ntz; ahj? (ii) ve;j epge;jidapd; fpo; mkf;fkpd;jl;l (Piezoeleectric dise) cau; tpr;rjld; mjpuk;? (iii) khwflj;jpapd; (transducer probe) njhopw;ghl ahj? juk; - 2 (206) - A+iy ngsjpftpay; Gel probe Jbg;Gfis gpwg;gpf;fk; cs;thq;fk; generate khwflj;jp and receive C Material B,izf;Fk; vz;nza; gir A under Ma;Tf;F cl;glj;jg;glk; nghus;
16 (b) (i) Clfk; xd;wpd; xypmiy jilia (acoustic impedance) jpu;khdpf;fk; fhuzpfs; vit? (ii) tspahdj Vd;,opT xyp miyj;jiliaf; (acoustic impedana) nfhz;lj? (iii) xypmiy jilapd; (acoustic impedance) S.I myif Fwpg;gpLf. (mbg;gil myfj; njhfjpapy; Fwpg;gpLf) (c) (i) khwflj;jpia nghuspd; Nkw;gug;gpd; kpj itg;gjw;f Kd;,izf;Fk; vz;nza; giria Nkw;gug;gpd; kpj G+RtJ Vd; mtrpakhdj? (ii) tsp,ilkfk;,d;wp Kidf;F Kid xd;wld; xd;w,izf;fg;gl;l nts;sp> nghd; Nru;j;jpr; rl;lj;jpy; nts;sp nghd;,ilkf xypj;njwpg;gf;fzfk; (R) If; fhz;f. nts;sp> nghd;; mlu;j;jpfs; KiwNa 0, 000 kgm -3, 20, 000 kgm -3, nts;sp> nghd;dpy; fopxypapd; Ntfq;fs; KiwNa 4, 000 ms -, 3, 000 ms - MFk;. (d) fnjhl;l fjpu; miytfhl;bapd; fhl;rpg;glj;jypy; gy Jbg;Gfs; fhzg;gltj Vd; vd tpsf;ff. (e) NkNy fhl;lg;gl;l fhl;rpg;glj;jy; jpiuapd; xt;nthu nrd;upkpw;wuk; (xt;nthu gpuptk;) 0. kpy;yp nrf;fd;fis Fwpg;gNjhL xt;nthu gpuptk; ehd;f rkgpuptfshf gpupf;fg;gl;ls;sd. (cuit ghu;f;f) cutpy; IP vd;gj Muk;gj;Jbg;igAk;> BW vd;gj (Clfj;jpd;) nghuspd; vy;iy,ilkfj;jpy; njwpg;gile;j Jbg;igAk; Fwpf;fpd;wd.,t; Clfj;jpy; fopxypapd; fjp 3000ms - MFk;. (i) Muk;gj;Jbg;G (IP) vt;thw jpiuapy; Njhd;wpanjd tpsf;ff. (ii) fopxyp Clfj;jpd; Kd;Rtupy;,Ue;J gpd;rtu; tiu nry;y vlj;j nkhj;j Neuk; ahj? (iii) Ma;Tf;F cl;glj;jg;gl;l Clfj;jpd;> epsk; ahj? (iv) A, B FiwghLfSf;F,ilg;gl;l fpilj;j}uj;ijf; fhz;f. (f) (i) fopnahypia gad;glj;jp nghus;fis Ma;Tf;F cl;glj;jypy; cs;s,u md$yq;fisf; $Wf. (ii) Nkw;$wg;gl;l Ma;tpw;F kpd;fhe;j miyfs; gad;glj;jtjpy; cs;s,lu;ghl ahj? 3) fz;zpypue;j NtWgl;l J}uq;fspy; cs;s nghul;fspd; njspthd tpk;gq;fis tpopj;jpiuapy; tpor;nra;af; $ba jpwid fz; nfhz;ls;sj. cz;ikapy; tpopntz;glyj;jpdjk; fz;tpy;iyapdjk; Nru;khdNk tpk;gj;ij cuthf;ffpd;wj. tpopntz;glykhdj CLfhl;Lk; Xu; ad;dy; Mf,Ug;gJld;> tsp rhu;ghf cau; KwpTr;Rl;b cilajhftk; cs;sj.,jid epiyj;j Ftpaj;J}uj;ij nfhz;l FtpT tpy;iyahf fujyhk;. mnj Ntis fz;tpy;iyapd; Ftpaj;J}uj;ij gprpu; jirfspd; cjtpapdhy; khw;wyhk;.,t;tpist jd;dikt vd miof;fg;glk;. tpopj;jpiuapy; Njhd;Wk;,U tpk;gq;fis NtWgpupj;jwpa tpopj;jpiuapy; mtw;wpw;f,ilg;gl;l J}uk; Mff; Fiwe;jJ 50 μm Mf,Uj;jy; Ntz;Lk;. (a) (i) fz;zpd; vg;gfjpapy; xspf;fjpu; mjpf tpyfyf;f cl;glfpd;wj? fhuzk; juf. (ii) jd;dikt vd;why; vd;d? juk; - 2 (206) - A+iy ngsjpftpay;
17 (b) tpopntz;glyj;jpdjk;> rhjhuz (gprpu;jirfs; jsu;e;jepiy) epiyapys;s fz; tpy;iyapdj nkhj;j ty + 50 D (ijnahj;ju;) (i) fz;tpy;iyf;fk; tpopj;jpiuf;fk;,ilg;gl;l J}uk; ahj? (ii) fz;zpypue;j 25cm J}uj;jpYs;s nghul;fis njspthf Nehf;fj; Njitahd,t; tpy;iyj;njhfjpapd; ty ahj? (c) (iii) (iv) tpopntz;lyj;jpd; ty + 44 D vdpd; (b) (ii),y; Fwpg;gpl;l epiyapy; fz;tpy;iyapd; Ftpa epsj;ijf; fzpf;f. gpd;tuk; epiyfsf;f fz;tpy;iyapd; tbtj;ij tiuf. fz;jsu;e;j epiyapy; cs;s NghJ fz; G+uz jd;ikald; cs;s NghJ FWk;ghu;itAila egupd; Nra;ikg; Gs;sp 250 cm mz;ikg;gs;sp 5 cm MFk;. (i) rhjhuz fz;zpd; Nra;ikg; Gs;spf;Fk;> FiwghLila fz;zpd; Nra;ikg; Gs;spf;Fk; xspf;fjpu; glk; tiuf. (ii),e;egu; J}ug;nghUis njspthf ghu;g;gjw;f mzpa Ntz;ba %f;ff; (iii) (iv) (v) fz;zhbapd; tyitf; fzpf;ff.,e;egu;,k; %f;ff; fz;zhbia mzpe;js;s NghJ mtuj mz;ikg; Gs;sp ahj?,k; %f;ff;fz;zhbia mzpe;js;s NghJ mtuj ghu;it tpr;r ahj?,e;egu;,k;%f;ff; fz;zhbia mzpe;js;s epiyapy;,tuhy; NtWgLj;jpg; ghu;f;ff;$ba,u Gs;spfSf;F,ilg;gl;l,opTj; J}uk; ahj? (fz;tpopj;j}uk; 2cm vdf;nfhs;f.) juk; - 2 (206) - A+iy ngsjpftpay;
18 Marking Scheme Physics July205Grade:-2(206) M.C.Q Answers ) 3 2) 3) 2 4) 2 5) 4 6) 4 7) 3 8) 9) 0) ) 4 2) 2 3) 3 4) 5 5) 3 6) 5 7) 5 8) 2 9) 20) 2 2) 3 22) 2 23) 3 24) 2 25) 3 25 x 2 = 50 Structured Essay (a) (i) Vernier Calliper (0) (ii) (b) (i) for meter ruler:- fractional error increase / accuracy decrease in length measurement (0) for micrometer screw gauge: - maximum measuring length is 2.5 cm (0) Correct diagram (0) Correct labeling (0) (ii) Adjust the position of the ruler until it gets balance over the knife edge horizontally (0) (iii) To avoid, mass of the meter ruler in the calculation (0) ( c ) (i) Weight:- 50g (0) Reason:- To decrease the fractional error in length measurement (0) (d) (i) fully immerse the glass cube in water and rebalance the ruler by adjust weight (m) (0) (e) d g = ( Glass cube (ii) distance between knife edge and new position of m (0) m l 2= (M dw M)l (02) l dg l2 l )d w (0) (f) d g = ( 35 M l l Knife edge Meter ruler ) 000 = 2500 kgm (0) m weight 2. (a) (i) On the sonometer box (0) (ii) Stationary and transverse waves (both correct) (0)
19 (iii) a Shape of the curves (0) Denote peak positions (0) (b) Bring the two pegs closer together, while vibrating tuning fork place on sonometer box (0) + (0) gradually increase the distance between the pegs until paper rider jums off, (0) finally measure the distance between the pegs. (c) f = T 2lo m (0) (d) (i)f = n 2l T m m m2 = 4, n, f = n2 T (0) 2l2 m2 = l n2 l2 m = 3 m2 2 4 = 3/ (0) + (0) (ii) AB:- 3 BC:- ( both correct) (0) (iii) λmax 2 = 40 cm, λ max = 80 cm or 0.8 m (0) (iv) V= 40 x0 3 = 200 ms (0) f = V = 200 λmax 0.8 = 250 Hz (0) 3. (a) (i) Objective:- B Eye piece:- A (both correct ) (0) (b) (i) 0 l o 2l o l (ii) focal length of B is grater than focal length of A (0) B A Correct position and labelling the lenses-- (0) fa + fb Denote correct distance between the Lenses (0) 2
20 (ii) infinity (0) (iii) M = f B / f A (0) (c) (i) M = D/ d (0) (ii) All of the rays come through objective, pass through the image of objective so that the position of image (d) (e) (i) is best position for placing eyes to observe the image (02) V - U = f d, fa = f say. x V + x = f V + = x f (0) (0) = x d Df (0) D (ii) focal length of A. or f A (0) 4. (a) Heat the tube, immerse open end of the tube into the mercury and cool it (0) (b) V = la (0) P = ( π + hh L ) cmhg (0) (c) change the inclined position of the tube and obtain the corresponding measurements of H and l (0) (d) PV = k k constant (0) (e) (f) ( π + hh L l = ah kl ) la = k (0) H + πa k x Correct graph (0) Labeling the axes (0) l (0) Correct graph (0) H Labeling the axes (0) 3
21 (g) (i) c m = π h L (0) π = c m x h = 0.05 L.64 x0 4 x 0 40 (correct substitution ) (0) (ii) H = 0, π = cmhg (0) = πa l k (0) = 0.05, l = 20 cm (0) l (iii) No, When h is small as the pressure exerted on the air column is small so that length of (iv) +L - L H air column will not change some extent (0) (0) l Part- B Essay,(a) Gases are compressible, when pressure exert on the gas energy loss occur (0) (b) liquid is an incompressible (0) (c) F = P x A =.5 x 0 6 x 5.6 x = 84N (0) (d) (i) F a (0) F a = F (0) (ii) Taking moment at O 3 x F a = 2 x F b (0) F b = 3 x 84 2 = 2 N (0) (e) (i).5 x 0 6 Pa (0) (ii) F = 4.4 x 0-5 x (0) = 26 N (0) 4
22 (f) Force exerted on the disc due to a single brake pad is P = 0. 5 x 26 = 08 N (0) (g) Let τ be the torque acting on the brake pad (i) τ = P x r + P x r (0) 6 = 08 x 2 x = 2.96 Nm (0) 00 (ii) Let α be the angular deceleration of the disc Applying τ = I α (0) = 0.2 α α = - 08 rad s (0) ω = ω o + α t 0 = ω o + (-08 x ) (iii) Applying ω 2 = ω o α θ 0 = x 08 θ (0) θ = 54 rad ω o = 08 rad s (0) Number of revolutions = θ = 54 = 2π (0) (iv) increase the distance between axis and brake pads / any suitable argument (0) 2. (a) (i) Grater than 20kHz (0) (ii) The frequency of a. c = natural frequency of the piezoelectric disc (0) (iii) To emit and receive ultrasound pulse (0) (b) (i) Density and speed (0) (ii) Due to low density of air (0) (iii) kg m -2 s (0) (c) (i) To reduce reflection of ultrasound at air / material interface to send more ultrasound energy into the materials (0) (ii) Z G = 6 x 0 7 kg m -2 s - ZS = 4 x 0 7 kg m -2 s - (both correct) (0) R = (0) (d) Due to reflection at flaws (defects or boundaries) (0) (e) (i) Due to reflection at the front wall of the material (0) 5
23 (ii) Distance between IP and BW pulses = = 9.00 cm (0) Time interval between pulses IP and BW = 0.ms cm - x 9.00cm = 9 x 0-4 s (0) Time taken by the ultrasound to travel from front wall to back wall = 2 x 9 x 0-4 s = 4.5 x 0-4 s (0) (iii) Length of the material = 3000 x 4.5 x 0-4 s =.35 m (0) (iv) Distance between pulses A and B = ( ) cm = 2.5 cm (0) Time interval between pulses A and B = 2.5 x 0. x 0-3 = 2.5 x 0-4 s (0) Horizontal distance between defects A and B = 2 x 2.5 x 0-4 x 3000 = m or 37.5 cm (0) (f) (i) Any two of :- non destructive, unharmful, time saving, efficient (0) (ii) Difficult to measure the time intervals due to high speed of electromagnetic waves (0) 3. (a) (i) Cornea, refractive index high (0) (ii) The focal length of eye lens can be adjusted by action of ciliary muscles (0) (b) (i) f = (ii) P = (0) m = 2cm (0) Distance between eye lens and retina = 2 cm (0) V - U = f f = = f (0) (0) cm of convex lens, f = 54 m P = f = 54 D (0) (iii) P + P2 = 54, 44 + P2 = (0) Where f - focal length of eye lens P2 = 0 D, f = m, f = 0 cm (0) 0 6
24 (iv) eye is in relax position eye is in full accommodation (0) (0) (c) (i) far point of normal eye far point of defect eye (0) (0) (ii) f = 250 cm concave lens P = D (0) (iii) \ (v) V - U = f - = (0) 5 U 250 d d 50 x0 6 = cm d = 4 x 0-4 m 2cm (0) = 0.4 mm (0) 50μm Final Marks = MCQ marks + 5 x x 2 2 7
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