Title 8. P2C8. Phy.-2nd-Paper-For-FRB-2024_Without Solve_Ridoy-23.5.24.pdf ✅

AvaywbK c`v_©weÁv‡bi m~Pbv  Final Revision Batch 1 Aóg Aa ̈vq AvaywbK c`v_©weÁv‡bi m~Pbv Introduction of Modern Physics Topicwise CQ Trend Analysis UwcK 2016 2017 2018 2019 2021 2022 2023 †gvU Av‡cwÿK ZË¡ Abymv‡i: mgq m¤úamviY, •`N© ̈ ms‡KvPb, fi e„w× 2 5 Ñ 3 10 5 3 28 fi kw3i m¤úK© Ñ 1 Ñ 1 Ñ Ñ 1 3 d‡UvB‡jw±aK wμqv 3 2 Ñ 4 Ñ 4 14 27 K¤úU‡bi cÖfve Ñ 1 Ñ Ñ Ñ Ñ Ñ 1 * we.`a.: 2020 mv‡j GBPGmwm cixÿv AbywôZ nqwb| weMZ mv‡j †ev‡W© Avmv m„Rbkxj cÖkœ 1| DÏxcKwU jÿ ̈ Ki: [Xv. †ev. 23] 3 V B 2550 A o A B cv‡Zi Kvh© A‡cÿK 2.2eV (K) ARo cÖm1⁄2 KvVv‡gv Kv‡K e‡j? (L) M ̈v‡jwjI I j‡iÄ iƒcvšÍi KLb Awfbœ n‡e e ̈vL ̈v Ki| (M) B cv‡Zi m~Pb Zi1⁄2‣`N© ̈ wbY©q Ki| DËi: 5.651  10–7 m (N) DÏxcK Abyhvqx 3 V wefe cÖ‡qv‡M d‡UvKv‡i›U cvIqv hv‡e wKbvÑ MvwYwZKfv‡e hvPvB Ki| mgvavb : 2.675 V cÖ‡qv‡MB d‡UvB‡jKUa‡bi MwZ †_‡g hv‡e| ZvB 3V wefe cÖ‡qv‡M d‡UvKv‡i›U cvIqv hv‡e bv| 2| Av‡jvK Zwor wμqv cixÿvq †mvwWqvg avZe cv‡Zi Dci 0.714  1015 Hz K¤úv‡1⁄4i Av‡jv AvcwZZ Ki‡j wbe„wË wefe 0.65 V nq| Avevi 3.1  102 nm Zi1⁄2 •`‡N© ̈i Av‡jv †dj‡j wbe„wË wefe 1.69 V nq| [iv. †ev. 23] (K) Zwor d¬v· Kv‡K e‡j? (L) cwievnxi †iv‡ai Dci ZvcgvÎvi wbf©ikxjZv †jLwP‡Îi mvnv‡h ̈ e ̈vL ̈v K‡iv| (M) cixÿ‡Y cÖvß DcvË n‡Z m~Pb K¤úv1⁄4 wbY©q K‡iv| DËi: 5.571  1014 Hz (N) Dfq †ÿ‡Î B‡jKUa‡bi m‡e©v”P †eM mgvb bqÑ MvwYwZK e ̈vL ̈v K‡iv| DËi: v1  v2; A_©vr Dfq †ÿ‡Î m‡e©v”P †eM mgvb bq| 3| GKwU avZzi Dci 3000 A o Ges 4400 A o Zi1⁄2 •`N© ̈wewkó `ywU Zwor Pz¤^Kxq Zi1⁄2 Avjv`vfv‡e †djv n‡jv| d‡j `ywU †ÿ‡ÎB avZe c„ô n‡Z B‡jKUab wbM©Z n‡jv| avZzwUi m~Pb Zi1⁄2 •`N© ̈ 5454 A o | [Kz. †ev. 23] (K) K...òe ̄‧ Kv‡K e‡j? (L) e ̄‧i †eM e„w× †c‡j •`N© ̈ ms‡KvPb e„w× cvqÑ e ̈vL ̈v K‡iv| (M) DÏxc‡K avZzwUi Kvh©v‡cÿK MeV GK‡K wbY©q K‡iv| DËi: 2.279  10–6 MeV (N) avZzi Dci AvcwZZ Av‡jvi Zi1⁄2‣`N© ̈ e„w× †c‡j wbe„wË wefe K‡gÑ DÏxc‡Ki Av‡jv‡K MvwYwZKfv‡e we‡kølY K‡iv| DËi: V01 > V02; A_©vr Av‡jvi Zi1⁄2 •`N© ̈ e„w× †c‡j wbe„wË wefe K‡g| 4| C B A Emax f(Hz) O 3×1015 6×1015 9×1015 wP‡Î d‡UvZwor wμqvi †ÿ‡Î avZe cv‡Zi Dci AvcwZZ Av‡jvi K¤úv1⁄4 ebvg avZe cvZ †_‡K wbM©Z B‡j±a‡bi MwZkw3 †`Lv‡bv n‡q‡Q| [h. †ev. 23] (K) †Wvwcs Kx? (L) wbDwK¬qvi wdkvb I wdDkb wewμqvi g‡a ̈ †KvbwU AwaK wbivc`? (M) DÏxc‡Ki B we›`y‡Z m‡e©v”P MwZkw3 wbY©q Ki| DËi: 1.989  10–18 J (N) B I C we›`y‡Z wbe„wË wef‡ei cv_©K ̈ MvwYwZKfv‡e we‡kølY Ki| DËi: V0 = 12.432 V ; A_©vr wbe„wË wef‡ei cv_©K ̈ 12.432 V|
2  HSC Physics 2nd Paper Chapter-8 5| GKRb gnvKvkPvix 30 eQi eq‡m 1.8  108 ms–1 †e‡M MwZkxj gnvk~b ̈hv‡b P‡o Qvqvc_ AbymÜv‡b †M‡jb Ges c„w_exi wn‡m‡e 30 eQi ci wd‡i G‡jb| H gnvk~b ̈hv‡bi •`N© ̈ 120 m Ges fi 2200 kg wQj| [P. †ev. 23] (K) m~Pb K¤úv1⁄4 Kx? (L) E = mc2 mgxKiYwUi A_© e ̈vL ̈v Ki| (M) DÏxc‡K ewY©Z gnvk~b ̈Pvix c„w_ex‡Z wd‡i G‡j Zuvi Kv‡Q Zvi eqm KZ n‡e? DËi: 54 years (N) DÏxc‡Ki Av‡jv‡K MwZkxj Ae ̄ vq gnvk~b ̈hv‡bi •`N© ̈ I fi Ges w ̄ i Ae ̄ vq •`N© ̈ I f‡ii cv_©K ̈ wK n‡e? †Zvgvi DËi MvwYwZK we‡køl‡Y `vI| DËi: MwZkxj Ae ̄’vq gnvk~b ̈hv‡bi •`N© ̈ I fi Ges w ̄’i Ae ̄’vq •`N© ̈ I f‡ii cv_©K ̈ n‡e| 6| bvwenv d‡UvZwor wμqv cixÿv Kivi Rb ̈ 3 eV Kvh©v‡cÿ‡Ki GKLÐ avZz wbj| avZzwU‡Z 280 nm Zi1⁄2‣`‡N© ̈i Av‡jv †djv n‡jv| †m Zvi evÜex wbjv‡K ejj, avZzwU †_‡K 7.11 × 105 m/s †e‡Mi B‡jKUab wbM©Z nq| [e. †ev. 23] (K) Kvh©v‡cÿK Kv‡K e‡j? (L) Av‡jvi J3⁄4¡j ̈ evo‡j d‡Uv Kv‡i›U ev‡o †Kb? e ̈vL ̈v Ki| (M) cixÿ‡Y e ̈eüZ Av‡jvi m~Pb Zi1⁄2‣`N© ̈ KZ? DËi: 4.144  10–7 m (N) bvwenvi Dw3i h_v_©Zv MvwYwZKfv‡e we‡kølY Ki| DËi: avZzwU n‡Z wbM©Z B‡jKUa‡bi †eM 7.111  105 ms–1 Gi mgvb ev Kg n‡e|  bvwenvi Dw3wU h_v©_| 7| ivBmv Av‡jv Zwor wμqv cixÿvq cUvwkqvg avZzi Dci h_vμ‡g 4300 A o I 5600 A o Zi1⁄2‣`‡N© ̈i Av‡jv AvcwZZ Kij| cvUvwkqv‡gi Kvh© A‡cÿK 2.1 eV| [wm. †ev. 23] (K) Kvj `xN©vqb Kx? (L) G· iwk¥ b‡j Uv‡M©U wn‡m‡e D”P Mjbv1⁄4wewkó avZz e ̈envi Kiv nq †Kb? (M) cUvwkqv‡gi m~Pb Zi1⁄2‣`N© ̈ wbY©q K‡iv| DËi: 5.92  10–7 m (N) ivBmvi cixÿvq AvcwZZ Av‡jvi Zi1⁄2‣`N© ̈ cwieZ©‡bi d‡j wbe„wË wef‡ei Kxiƒc cwieZ©b n‡e? MvwYwZKfv‡e we‡kølY K‡iv| DËi: V01 > V02; A_©vr AvcwZZ Av‡jvi Zi1⁄2 •`N© ̈ †ewk n‡j wbe„wË wefe Kg‡e| 8| GKwU KYv (P) Gi w ̄’i fi 2 × 10–20 kg| KYvwU 0.91c †e‡M MwZkxj| Avi GKwU KYv (Q) hvi w ̄’i fi 1.6 × 10–19 kg| [w`. †ev. 23] (K) X-iwk¥ Kx? (L) gvB‡Kjmb †gvi‡j cixÿvi djvdj e ̈vL ̈v Ki| (M) P-KYvwUi Av‡cwÿK ZË¡xq MwZkw3 wbY©q Ki| DËi: 2.541  10–3 J (N) Av‡cwÿK ZË¡vbyhvqx P KYvwUi fi Q KYvi w ̄ i f‡ii mgvb nIqv m¤¢eÑ MvwYwZKfv‡e hvPvB Ki| DËi: Av‡cwÿK ZË¡vbyhvqx P KYvwUi †eM 2.976  108 ms–1 n‡j Gi fi Q KYvi w ̄’i f‡ii mgvb nIqv m¤¢e| 9| cUvwkqv‡gi Kvh© A‡cÿK 2 eV| cUvwkqv‡gi GKwU cv‡Zi cÖ_‡g 3000 A  Gi Av‡jv AvcwZZ n‡jv| cieZ©x‡Z 4500 A  Gi Av‡jv †djv n‡jv : h = 6.63  10–34 J-s. [g. †ev. 23] (K) Kvj `xN©vqb Kv‡K e‡j? (L) Pjgvb e ̄‧i •`N© ̈ KLbI k~b ̈ nq bv †Kb? e ̈vL ̈v K‡iv| (M) 1g †ÿ‡Î wbtm„Z B‡jKUa‡bi MwZkw3 wbY©q K‡iv| DËi: 3.43  10–19 J (N) ÒGKB avZzi Dci AvcwZZ Av‡jvi Zi1⁄2‣`N© ̈ evov‡j wefe K‡g hvqÓÑ DÏxc‡Ki Av‡jv‡K MvwYwZKfv‡e hvPvB Ki| DËi: V01 > V02 A_©vr ÔGKB avZzi Dci AvcwZZ Av‡jvi Zi1⁄2 •`N© ̈ evov‡j wefe K‡g hvqÕÑ Dw3wU h_v_©| 10| Abb ̈v wmwRqvg avZzi cv‡Z 4.5  10–7 m Zi1⁄2‣`‡N© ̈i Av‡jv AvcwZZ K‡i d‡Uv Zwor wμqvi cixÿv cwiPvjbv Ki‡Q| †m wbe„wË wefe †c‡jv 1.5 V| cieZ©x‡Z 5.5  10–7 m Zi1⁄2‣`‡N© ̈i meyR Av‡jv e ̈envi K‡i| [†`qv Av‡Q, B‡jKUa‡bi fi = 9.1  10–31 kg] [Xv. †ev. 22] (K) Ro cÖm1⁄2 KvVv‡gv Kv‡K e‡j? (L) †Kv‡bv e ̄‧i fi KL‡bv Amxg n‡Z cv‡i bv †Kb? e ̈vL ̈v Ki| (M) DÏxcK Abymv‡i d‡UvB‡jKUa‡bi m‡e©v”P MwZ‡eM wbY©q Ki| DËi: 7.259  105 ms–1 (N) meyR Av‡jv e ̈envi Kivq d‡UvZwor cÖevn NU‡e wKbv? MvwYwZK we‡køl‡Yi gva ̈‡g †`LvI| DËi: Green(5.5  10–7 m) < 0 (m~Pb Zi1⁄2 •`N© ̈)  meyR Av‡jv e ̈envi Kivq d‡Uv Zwor cÖevn NU‡e| 11| [iv. †ev. 22] K Kmax (1.4eV) 8.5  1014 Hz f Øv`k †kÖwYi weÁv‡bi QvÎx wgbv cixÿvMv‡i d‡UvZwor wμqv cÖ`k©b K‡i Zvi cÖvß djvdj n‡Z D‡jøwLZ MÖvdwU A1⁄4b Ki‡jv| cixÿvMv‡i 1.5 volt Gi GKwU e ̈vUvix Av‡Q| (K) Av‡cwÿKZvi cÖ_g ̄^xKvh© wee„Z Ki| (L) wbDwK¬qvi wdkb wewμqv `aæZ nv‡i e„w× cvq †Kb? e ̈vL ̈v Ki| [Aa ̈vq-9] (M) m~Pb Zi1⁄2‣`N© ̈ wbY©q Ki| DËi: 5.858  10–7 m (N) wgbv wK †Kv‡bvfv‡e D3 cixÿvq cÖvß d‡UvcÖevn H e ̈vUvixi mvnv‡h ̈ eÜ Ki‡Z cvi‡e? MvwYwZKfv‡e e ̈vL ̈v `vI| DËi: e ̈vUvwii †fv‡ëR (1.5 V) > wbe„wË wefe (1.4 V)| A_©vr wgbv cixÿvq cÖvß d‡UvcÖevn H e ̈vUvixi mvnv‡h ̈ eÜ Ki‡Z cvi‡e|
AvaywbK c`v_©weÁv‡bi m~Pbv  Final Revision Batch 3 12| GKRb gnvk~b ̈Pvix 25 eQi eq‡m 1.8  108 m/sec †e‡M MwZkxj GKwU gnvk~b ̈ hv‡b P‡o gnvKvk åg‡Y †M‡jb| c„w_exi wnmv‡e wZwb 30 eQi gnvKv‡k KvwU‡q f~- c„‡ô wd‡i G‡jb| c„w_ex‡Z gnvk~b ̈hvbwUi •`N© ̈ wQj 80 m| [Kz. †ev. 22] (K) d‡UvB‡jKwUaK wμqv Kx? (L) cøvwUbv‡gi m~Pb K¤úvsK 15.24  1014 Hz ej‡Z Kx eyS? (M) c„w_ex †_‡K cwigvcK...Z MwZkxj gnvk~b ̈hvbwUi •`N© ̈ KZ? DËi: 64 m (N) DÏxc‡K DwjøwLZ gnvk~b ̈Pvix f~-c„‡ô wd‡i G‡m 45 Zg Rb¥w`b cvjb Ki‡eÑG K_vi mwVKZv hvPvB Ki| DËi: gnvk~b ̈Pvix f‚-c„‡ô wd‡i G‡m 45 Zg Rb¥w`b cvjb Ki‡Z cvi‡e bv| 13| Kwei I Avwei 30 eQi eq‡m h_vμ‡g 0.88c Ges 0.99c †e‡M MwZkxj `ywU gnvk~b ̈ hv‡b K‡i gnvKvk åg‡Y †M‡jb| c„w_exi wn‡m‡e 20 eQi ci Zviv c„w_ex‡Z wd‡i G‡jb| [h. †ev. 22] (K) AvBb÷vB‡bi Av‡cwÿKZvi wØZxq ̄^xKvh©wU †jL| (L) Kx k‡Z© j‡i›UR iƒcvšÍi M ̈vwjjxq iƒcvšÍ‡i wKsev M ̈vwjjxq iƒcvšÍi j‡i›UR iƒcvšÍi M ̈vwjjxq iƒcvšÍ‡i wKsev M ̈vwjjxq iƒcvšÍi j‡i›UR iƒcvšÍ‡i cwiewZ©Z nqÑ e ̈vL ̈v Ki| (M) DÏxc‡Ki Av‡jv‡K c„w_ex‡Z wd‡i Avmvi ci Zv‡`i eq‡mi e ̈eavb KZ n‡e? DËi: 6.678 years n‡e (N) hvÎvKv‡j c„w_ex‡Z Df‡qi fi 70 kg n‡j MwZkxj Ae ̄ vq Zv‡`i fi mgvb n‡e wKbvÑ MvwYwZK we‡køl‡Yi gva ̈‡g †`LvI| DËi: m1  m2; A_©vr hvÎvKv‡j Zv‡`i fi mgvb n‡e bv| 14| 5.55  1014 Hz m~Pb K¤úvs‡Ki GKLÐ avZzi Dci 2800Å Zi1⁄2‣`‡N© ̈i Av‡jv cwZZ n‡j avZz †_‡K B‡jKUab wbM©Z nq| [P. †ev. 22] (K) •`N© ̈ ms‡KvPb Kv‡K e‡j? (L) f‡ii Av‡cwÿKZv ej‡Z wK eyS? (M) wbM©Z d‡UvB‡jKUa‡bi m‡e©v”P MwZ‡eM wbY©q Ki| DËi: 8.67  105 ms–1 (N) avZzL‡Ði Dci 2800Å Zi1⁄2‣`‡N© ̈i Av‡jv AvcwZZ n‡j B‡jKUab wbM©Z n‡e wK bv? MvwYwZKfv‡e we‡kølY Ki| DËi: E > W; A_©vr avZzL‡Ði Dci 2800 A  Zi1⁄2 •`‡N© ̈i Av‡jv AvcwZZ n‡j B‡jKUab wbM©Z n‡e| 15| 0.6 c MwZ‡Z Pjgvb GKwU i‡K‡U 0.5 kg f‡ii GK wgUvi j¤^v GKwU Zvgvi `Ð ivLv Av‡Q| w ̄’i Ae ̄’vq Zvgvi NbZ¡ 8960 kgm–3 , c Av‡jvi `aæwZ| [e. †ev. 22] (K) d‡UvZwor wμqv Kx? (L) †Kv‡bv †ZRw ̄...q c`v‡_©i wbt‡kl Kvj AmxgÑe ̈vL ̈v Ki| [Aa ̈vq-9] (M) Zvgvi `Ð †_‡K cÖvß kw3 wbY©q Ki| DËi: 5.625  1016 J (N) cÖ ̄ I †ea Av‡cwÿKZvi we‡ePbvq bv G‡b i‡K‡U Zvgvi Nb‡Z¡i Kxiƒc cwieZ©b n‡e? MvwYwZK e ̈vL ̈vmn †`LvI| DËi:  = 56.25%; A_©vr i‡K‡U Zvgvi NbZ¡ 56.25% e„w× cv‡e| 16| GKRb gnvk~b ̈Pvix 25 eQi eq‡m 2.5  108 ms–1 †e‡M GKwU i‡K‡U P‡o bZzb MÖn AbymÜv‡b †Mj| c„w_ex‡Z i‡K‡Ui •`N© ̈ wQj 72 m. [wm. †ev. 22] (K) ` ̈ eaMwji Zi1⁄2 Kx? (L) K...ò MnŸi n‡Z Av‡jv wbM©Z n‡Z cv‡i bv †Kb? e ̈vL ̈v Ki| [Aa ̈vq-11] (M) D3 MwZkxj i‡K‡Ui •`N© ̈ KZ n‡e? DËi: 39.8 m (N) AbymÜvb †k‡l b‡fvPvix c„w_exi wnmv‡e 25 eQi ci wd‡i Avm‡j Av‡cwÿK ZË¡ Abyhvqx Zvi eqm c„w_exi K ̈v‡jÛvi †gvZv‡eK GKB n‡e wKbvÑMvwYwZKfv‡e we‡køl‡Yi gva ̈‡g †Zvgvi gZvgZ `vI| DËi: Av‡cwÿK ZË¡ Abymv‡i Zvi eqm c„w_exi K ̈v‡jÛvi Abyhvqx GKB n‡e bv| 17| d‡UvZwor wμqvq A, B Ges C wZbwU avZe †cøU e ̈envi Kiv n‡jv hv‡`i Kvh©v‡cÿK h_vμ‡g WA = 3eV, WB = 4eV Ges WC = 5eV Ges Avjv`vfv‡e G‡`i Dci h_vμ‡g 300 nm, 400 nm Ges 500 nm Zi1⁄2‣`‡N© ̈i mgZxeaZvi Av‡jv †d‡j d‡UvZwo‡Zi gvb cixÿv Kiv n‡jv| [h = 6.6  10–34 Js] (ms‡kvwaZ) [w`. †ev. 22] (K) Kvj `xN©vqb Kx? (L) X-Ray cixÿvq cÖvß X-Ray Gi ZxeaZv cixÿ‡Yi †Kvb wel‡qi Dci wbf©i K‡i? e ̈vL ̈vmn wjL| (M) A †cø‡Ui †ÿ‡Î wbM©Z B‡jKUa‡bi m‡e©v”P MwZkw3 wbY©q Ki| DËi: 1.83  10–19 J (N) DÏxc‡Ki Z_ ̈ n‡Z wZbwU avZzi †ÿ‡Î wbe„wË wef‡ei gv‡bi Zzjbvg~jK we‡kølY Ki| DËi: A †cø‡Ui †ÿ‡Î wbe„wË wef‡ei gvb 1.125 eV Ges B I C Dfq †cø‡Ui †ÿ‡Î wbe„wË wef‡ei gvb k~b ̈| 18| †Kv‡bv GK gnvKvk M‡elYv †K›`a †_‡K 500 kg f‡ii Ges 11.5 m •`‡N© ̈i GKwU b‡fvhvb 0.3 c †e‡M Dr‡ÿcY Kiv n‡qwQj| [g. †ev. 22] (K) m~Pb K¤úvsK Kv‡K e‡j? (L) Òwdk‡bi ci Drcv‡`i †gvU fi wewμq‡Ki †gvU f‡ii ZviZg ̈ nq, †Kb? e ̈vL ̈v Ki|Ó [Aa ̈vq-9] (M) b‡fvhv‡bi Pjgvb •`N© ̈ wbY©q Ki| DËi: 10.97 m (N) b‡fvhvbwUi †eM wØ ̧Y Ki‡j MwZkxj fi wØ ̧Y n‡e wK? MvwYwZK we‡køl‡Yi gva ̈‡g hvPvB Ki| DËi: b‡fvhvbwUi †eM wØ ̧Y Ki‡j MwZkxj fi wØ ̧Y n‡e bv| 19| GKwU hy×wegv‡bi Pjgvb •`N© ̈ 180 m Ges Pjgvb fi 18000 kg| GwU †Kvb w ̄’i ch©‡eÿ‡Ki mv‡c‡ÿ 18  107 ms–1 †e‡M MwZkxj| [Xv. †ev. 21] (K) Zi1⁄2gyL Kv‡K e‡j? [Aa ̈vq-1] (L) †Kv‡bv e ̄‧ Av‡jvi †e‡Mi †_‡K †ewk †e‡M Pjv m¤¢e n‡j f‡ii Kx cwieZ©b NU‡ZvÑe ̈vL ̈v Ki| (M) hy× wegv‡bi w ̄ i •`N© ̈ wbY©q Ki| DËi: 225 m (N) DÏxc‡K DwjøwLZ hy× wegv‡bi †eM A‡a©K Kiv n‡j Gi fi w ̄ i f‡ii wØ ̧Y n‡e wKbv? MvwYwZKfv‡e we‡kølY Ki| DËi: m  2m0; A_©vr hy× wegv‡bi †eM A‡a©K Kiv n‡j Gi w ̄’i f‡ii wØ ̧Y n‡e bv|
4  HSC Physics 2nd Paper Chapter-8 20| 30 eQi eqmx GKRb b‡fvPvix GKwU i‡K‡U P‡o bZzb MÖ‡ni AbymÜv‡b †Mj| i‡KUwU‡K Ggb †e‡M Pvjv‡bv n‡jv †hb Zvi MwZkxj •`N© ̈ wbðj Ae ̄’vi •`‡N© ̈i A‡a©K nq| AbymÜvb †k‡l D3 b‡fvPvix i‡K‡U K ̈v‡jÛvi Abyhvqx 30 eQi ci wd‡i Avmj| [iv. †ev. 21] (K) Kvj `xN©vqb Kx? (L) ÒM ̈vwjwjI iƒcvšÍi wewa AvBb÷vB‡bi wØZxq ̄^xKvh©‡K mg_©b K‡i bv|ÓÑe ̈vL ̈v Ki| (M) i‡KUwU KZ †e‡M PjwQj? wbY©q Ki| DËi: 2.598  108 ms–1 (N) Av‡cwÿK ZË¡ Abymv‡i c„w_ex‡Z wd‡i Avmvi ci c„w_ex K ̈v‡jÛvi Abymv‡i D3 b‡fvPvix eqm GKB _vK‡e wKbv? MvwYwZK we‡køl‡Yi mvnv‡h ̈ gšÍe ̈ Ki| DËi: B  S; A_©vr †ewj I †kwji wbKU e ̄‘wUi NbZ¡ GKB n‡e bv| 21| †ewj GKwU AvqZvKvi Nbe ̄‘i •`N© ̈ 50 cm, cÖ ̄’ 25 cm, D”PZv 25 cm Ges fi 100 gm cwigvc K‡ib| Ab ̈w`‡K e ̄‘wUi •`N© ̈ eivei MwZkxj KvVv‡gv n‡Z †kwji wbKU e ̄‘wU‡K NbKvK...wZ g‡b nq| [Kz. †ev. 21] (K) Ro cÖm1⁄2 KvVv‡gv Kv‡K e‡j? (L) w ̄ i fim¤úbœ †Kvb e ̄‧KYv Av‡jvi †e‡Mi mgvb †e‡M MwZkxj n‡Z cv‡i bvÑe ̈vL ̈v Ki| (M) MwZkxj KvVv‡gvi `aæwZ wbY©q Ki| DËi: 2.6  108 ms–1 (N) †ewj I †kwji wbKU e ̄‧wUi NbZ¡ GKB n‡e Kx? MvwYwZK we‡kølYc~e©K gZvgZ `vI| DËi: †kwji wbKU e ̄‘wUi NbZ¡ †ewk n‡e| 22| c„w_exi c„ô n‡Z 250 Av‡jvKel© `~‡i GKwU MÖ‡ni Dci M‡elYv Kivi Rb ̈ GK`j M‡elK 60 eQi eqmx GKwU cÖvYx‡K 0.6 c †e‡M Pjgvb b‡fvhv‡bi gva ̈‡g H MÖ‡n cvVvq| H cÖvYxi fi 20 kg| 1 Av‡jvKel© = 9.4  1015 m| cÖvYxwUi Mo Avqy ̄..vj 100 eQi| [h. †ev. 21] (K) Ro KvVv‡gv Kx? (L) †Kv‡bv e ̄‧ †Kb Av‡jvi †e‡M Pj‡Z cv‡i bvÑe ̈vL ̈v Ki| (M) DÏxc‡Ki Av‡jv‡K PjšÍ Ae ̄ vq cÖvYxwUi fi KZ n‡e? †ei Ki| DËi: 25 kg (N) DÏxc‡Ki Z_ ̈ Abyhvqx Pjgvb cÖvYxwU RxweZ H MÖ‡n †cu.Qv‡Z mÿg n‡e wKÑbv? MvwYwZKfv‡e e ̈vL ̈v Ki| DËi: Pjgvb cÖvwYwU RxweZ H MÖ‡n †cu.Qv‡Z mÿg n‡e bv| 23| iwng I ivqnvb `yB eÜzi Rb¥ 1980 mv‡j| Zviv †h ̄..z‡ji QvÎ wQj †m ̄..zj ̄’vwcZ nq 1950 mv‡j| 30 eQi eq‡m ivqnvb 90 wgUvi j¤^v gnvKvkhv‡b P‡o 0.8 c †e‡M gnvKv‡k hvÎv ïiæ Ki‡jv Ges ivqnv‡bi wnmve g‡Z 23 eQi c‡i wd‡i G‡jv Zvi ̄..z‡ji 100 eQi c~wZ© Abyôv‡b †hvM †`Iqvi Rb ̈| [P. †ev.-21] (K) e ̈wZPvi Kv‡K e‡j? [Aa ̈vq-7] (L) ARo cÖm1⁄2 KvVv‡gv‡K KL‡bv wK Ro cÖm1⁄2 KvVv‡gvq iƒcvšÍi Kiv hvq? e ̈vL ̈v Ki| (M) iwn‡gi wbKU gnvKvk hv‡bi •`N© ̈ KZ g‡b n‡e? DËi: 54 m (N) ivqnvb Zvi ̄..z‡ji Abyôv‡b †hvM w`‡Z cvi‡e wK? MvwYwZK we‡kølYmn gZvgZ `vI| DËi: ̄..z‡ji Abyôvb n‡e 2050 mv‡j; A_©vr ivqnvb Zvi ̄..z‡ji Abyôv‡b †hvM w`‡Z cvi‡e| 24| ivZzj I cÖxZg 18 eQi eqmx `yB RgR fvB| ivZzj 200 m •`‡N© ̈i Ges Av‡jvK `aæwZi 90% `aæwZ‡Z MwZkxj GKwU gnvk~b ̈hv‡b P‡o gnvKvk åg‡Y hvq| hvIqvi mgq ivZzj Zvi fvB cÖxZg‡K e‡j ÒhLb †Zvgvi eqm 40 eQi n‡e ZLb Avwg 25 eQ‡ii Kg eqmx wn‡m‡e c„w_ex‡Z wd‡i Avm‡ev|Ó [e. †ev.-21] (L) Ro cÖm1⁄2 KvVv‡gv Kx? (L) †Kvb e ̄‧ Av‡jvi †e‡Mi †P‡q †ewk †e‡M Pj‡Z cv‡i bvÑ e ̈vL ̈v Ki| (M) c„w_exi mv‡c‡ÿ gnvk~b ̈hvbwUi •`N© ̈ wbY©q Ki| DËi: 87.18 m (N) DÏxc‡Ki ivZz‡ji e3‡e ̈i mZ ̈Zv hvPvB Ki| DËi: ivZzj 25 eQ‡ii †ewk eq‡m c„w_ex‡Z wd‡i Avm‡e|  ivZz‡ji e3e ̈ mZ ̈ bq| 25| GKRb gnvk~b ̈Pvix 25 eQi eq‡m 2.4  108 ms–1 †e‡M MwZkxj GKwU gnvk~b ̈hv‡b P‡o gnvKvk åg‡Y wM‡q wd‡i G‡jb| c„w_exi gvbyl Zv‡K †`L‡Z †c‡jb 75 eQi eq‡mi GKRb e„× wn‡m‡e| [wm. †ev. 21] (K) Ro cÖm1⁄2 KvVv‡gv ej‡Z Kx eyS? (L) M ̈vwjwjI iƒcvšÍi e ̈vL ̈v Ki| (M) gnvk~b ̈Pvixi eqm wbY©q Ki| DËi: 55 eQi (N) gnvk~b ̈Pvix Zvi 50 Zg Rb¥w`b c„w_ex‡Z Ki‡Z PvB‡j Zv‡K KZ †e‡M MwZkxj n‡Z n‡e? DËi: v = 2.598  108 ms–1 A_©vr 50 Zg Rb¥w`b c„w_ex‡Z Ki‡Z PvB‡j Zv‡K 2.598  108 ms–1 †e‡M MwZkxj n‡Z n‡e| 26| GKwU dzUej †Ljvi gv‡Vi •`N© ̈ 400 m Ges cÖ ̄’ 200 m| GKRb b‡fvPvix 0.86 c †e‡M 1000 kg f‡ii GKwU b‡fvhv‡b P‡o gvVwUi •`N© ̈ eivei AwZμg Kij|[w`. †ev. 21] (K) M ̈vwjjxq iƒcvšÍi Kv‡K e‡j? (L) Ro KvVv‡gv I ARoKvVv‡gv `ywUi g‡a ̈ cv_©K ̈ wbiƒcY Ki| (M) b‡fvhvbwUi AvcvZ fi wbY©q Ki| DËi: 1959.65 kg (N) Òb‡fvPvix KZ...©K wbY©qK...Z gvVwUi †ÿÎdj cÖK...Z †ÿÎd‡ji mgvb bq|Ó MvwYwZK we‡køl‡Yi gva ̈‡g hvPvB Ki| DËi: A  A; A_©vr b‡fvPvix KZ...©K wbY©qK...Z gvVwUi †ÿÎdj cÖK...Z †ÿÎd‡ji mgvb bq|