Title 1. P2C1. Thermodynamics_With Solve_Ridoy 18.1124.pdf ✅

ZvcMwZwe` ̈v  Varsity Practice Sheet 1 MCQ weMZ mv‡j DU-G Avmv cÖkœvejx 1. STP-†Z GKwU Av`k© M ̈vm‡K cÖ_‡g Zvi cÖv_wgK AvqZ‡bi GK-Z...Zxqvs‡k msKzwPZ Kiv nq, Ges Zvici cÖmvwiZ n‡Z †`Iqv nq hZÿY bv Zvi Pvc cÖv_wgK Pv‡ci A‡a©K nq| Dfq cÖwμqvq M ̈v‡mi ZvcgvÎv w ̄’i _v‡K| hw` M ̈v‡mi cÖv_wgK Af ̈šÍixY kw3 U n‡q _v‡K Zvn‡j Gi P‚ovšÍ Af ̈šÍixY kw3 KZ? [DU 23-24] U 3 U 2 U 2U 3 DËi: U e ̈vL ̈v: †h‡nZz m‡gvò cÖwμqv ZvB, U = 0 2. GKwU Kv‡b©v BwÄb 227C Ges 127C ZvcgvÎvi g‡a ̈ KvR K‡i| hw` BwÄb KZ...©K K...ZKv‡Ri cwigvY 500 J nq, Z‡e Zvc MÖvn‡K cÖZ ̈vL ̈vZ Zv‡ci cwigvY KZ n‡e? [DU 22-23] 2000 J 1500 J 500 J 1000 J DËi: 2000 J e ̈vL ̈v:  = 1 – T2 T1 = 1 – 400 500 = 1 5 Q1 – Q2 = W  5W – Q2 = W    ∵   = W Q1  4W = Q2  Q2 = 4  500 = 2000 J 3. KZ ZvcgvÎv †mjwmqvm † ̄‹j I dv‡ibnvBU † ̄‹‡j Awfbœ n‡e? [CU 22-23; BRUR 19-20; DU 17-18; CU 15-16; JU 14-15] – 35 – 40 – 42 – 45 DËi: – 40 e ̈vL ̈v: TF = 9 5 TF + 32  TF = – 40 4. GKwU Av`k© M ̈v‡mi †ÿ‡Î CP CV = x n‡j, wb‡Pi †Kvb m¤úK©wU H M ̈v‡mi GK †gv‡ji Rb ̈ mwVK? [DU 22-23, 15-16] CV = (x –1) R CV = R/(x – 1) CV = R/(1 – x) CV = R/(1 + x) DËi: CV = R/(x – 1) e ̈vL ̈v: CP – CV = R  CV = CP – R [CP = xCV]  CV (x – 1) = R  CV = R x – 1 5. GKwU ivbœvN‡ii †`qvj, wmwjs Ges †g‡S Zvcxq AšÍiK c`v_© w`‡q •Zwi| ivbœvN‡i GKwU mvaviY †iwd«Rv‡iU‡ii `iRv Ly‡j Zv Pvjy ivLv n‡j ivbœvN‡ii ZvcgvÎvÑ [DU 21-22] Kg‡e w ̄’i _vK‡e evo‡e cÖ_‡g evo‡e Zvici Kg‡e DËi: evo‡e e ̈vL ̈v: †iwd«Rv‡iUiwU kxZj Zvcvavi n‡Z Zvc MÖnY K‡i cwi‡e‡k eR©b K‡i| d‡j cwi‡ek Z_v ivbœvN‡ii ZvcgvÎv e„w× cvq| 6. GKwU cÖZ ̈veZ©x PμvKvi cÖwμqvq GK P‡μi c‡i wb‡Pi †KvbwU k~b ̈ bvI n‡Z cv‡i? (GLv‡b U = AšÍt ̄’ kw3, P = Pvc, W = wm‡÷‡gi Øviv K...Z KvR, S = GbUawc) [DU 21-22] U W P S DËi: W 7. 27C Ges 230C ZvcgvÎv؇qi g‡a ̈ Kvh©iZ GKwU Kv‡b©v Bwćbi Kg©`ÿZv n‡eÑ [JU 20-21, 14-15; DU 16-17; JnU 14-15] 20% 40% 60% †KvbwUB bq DËi: 40% e ̈vL ̈v:  = 1 – T2 T1 = 1 – 300 500 = 1 – 3 5 T1 = 230 + 273 = 503  500 K T2 = 27 + 273 = 300 K = 2 5  100% = 40%
2  Physics 2nd Paper Chapter-1 8. GKwU c`v‡_© Zvc cÖ‡qvM Kivi ciI ZvcgvÎvi cwieZ©b nqwb| wb‡Pi †Kvb Dw3wU GB NUbvi Dchy3 e ̈vL ̈v cÖ`vb K‡i? [Agri Guccho 20-21; KU 13-14; DU 13-14] c`v_©wU Aek ̈B M ̈vm c`v_©wUi `kv (phase) cwieZ©b n‡”Q c`v_©wUi Zvcxq •ewkó ̈ e ̈wZμgag©x Pvicv‡ki cwi‡e‡ki Zzjbvq c`v‡_©i ZvcgvÎv Kg DËi: c`v_©wUi `kv (phase) cwieZ©b n‡”Q 9. iæ×Zvcxq cÖwμqvq e ̄‘i †h Zvcxq ag© w ̄’i _v‡K Zv‡K e‡jÑ [BRUR 19-20; DU 18-19; KU 11-12; 09-10, 07-08] G›Uawc Gb_vjwc w ̄’i Zvcxq Ae ̄’v iæ× Zvcxq Ae ̄’v DËi: G›Uawc 10. GKwU Kv‡b©v BwÄb 500 K Ges 250 K ZvcgvÎvi `yBwU Avav‡ii gva ̈‡g cwiPvwjZ nq| cÖ‡Z ̈K P‡μ BwÄb hw` Drm †_‡K 1 kcal Zvc MÖnY K‡i Zvn‡j cÖ‡Z ̈K P‡μ Zvc MÖvn‡K Zvc eR©b Kivi cwigvY KZ? [DU 19-20] 500 kcal 1000 cal 500 cal 10 kcal DËi: 500 cal e ̈vL ̈v: Q2 Q1 = T2 T1  250 500 = Q2 1  Q2 = 0.5 kcal = 500 cal 11. 60C ZvcgvÎvi 10 kg cvwb‡K 100C ZvcgvÎvi ev‡®ú cwiYZ Ki‡j G›Uawci cwieZ©b KZ JK–1 ? [cvwbi ev®úxfe‡bi myß Zvc 2.26  106 Jkg–1 ] [SUST 19-20; DU 17-18] 6.04  104 0.48  104 7.26  104 8.05  104 6.54  104 DËi: 6.54  104 e ̈vL ̈v: S = mSln     T2 T1 + mLv T2 = 10  4200  ln     100 + 273 60 + 273 + 10  226  106 273 + 100 = 6.535  104 JK–1 12. cvwb, eid I Rjxqev®ú †h ZvcgvÎvq GKm‡1⁄2 _vK‡Z cv‡i Zv n‡jvÑ [RU 18-19; CoU 13-14; DU 03-04] 0 K 273.16 K 100 K 4 K DËi: 273.16 K e ̈vL ̈v: wbw`©ó Pv‡c †h ZvcgvÎvq eid, cvwb I ev®ú mvg ̈ve ̄’vq _v‡K Zv‡K cvwbi •Îa we›`y e‡j| cvwbi •Îa we›`y 0C ev 273.16 K| 13. A ̈vjywgwbqvg cvZ †_‡K †K‡U wP‡Î cÖ`wk©Z GKwU ejqvKvi A ̈vjywgwbqvg wis •Zwi Kiv n‡q‡Q| GwU Mig Ki‡j Kx N‡U? [DU 18-19] A ̈vjywgwbqvg evB‡ii w`‡K ewa©Z nq I wQ`a GKB AvKv‡ii _v‡K wQ‡`ai e ̈vm K‡g hvq wQ‡`ai †ÿÎdj A ̈vjywgwbqv‡gi †h‡Kv‡bv As‡ki †ÿÎd‡ji mgvb Abycv‡Z e„w× cvq wQ‡`ai †ÿÎdj A ̈vjywgwbqv‡gi †h‡Kv‡bv As‡ki †ÿÎd‡ji †P‡q †ewk Abycv‡Z e„w× cvq DËi: wQ‡`ai †ÿÎdj A ̈vjywgwbqv‡gi †h‡Kv‡bv As‡ki †ÿÎd‡ji mgvb Abycv‡Z e„w× cvq e ̈vL ̈v: wQ‡`ai mxgvwšÍK AYy ̧‡jv GKB nv‡i wb‡R‡`i g‡a ̈ `~iZ¡ e„w× K‡i| 14. GKwU Av`k© M ̈vm GKwU Zvc AšÍi‡Ki AveiYhy3 `„p cv‡Î k~b ̈ gva ̈‡g cÖmvwiZ n‡jv| d‡j wb‡¤œi †KvbwU N‡U? [DU 18-19] AšÍt ̄’ kw3i †Kv‡bv cwieZ©b nq bv ZvcgvÎv n«vm cvq Pv‡ci †Kv‡bv cwieZ©b nq bv `kvi cwieZ©b nq DËi: ZvcgvÎv n«vm cvq e ̈vL ̈v: iƒ×Zvcxq cÖmvi‡Y wm‡÷g kxZj nq| 15. GKwU Zvcxq BwÄb cÖwZwU P‡μ abvZ¥K KvR K‡i Ges Zvc nvivq, wKš‘ BwÄbwU †Kvb Zvc MÖnY K‡i bv| BwÄbwU ZvcMwZwe` ̈vi †Kvb m~·K j•Nb K‡i? [DU 18-19] k~b ̈Zg m~Î cÖ_g m~Î wØZxq m~Î Z...Zxq m~Î DËi: wØZxq m~Î 16. GKwU Kv‡b©v BwÄb 800 K I 400 K ZvcgvÎvq †h `ÿZvq KvR K‡i, wVK mg`ÿZvq KvR K‡i T K Ges 900 K ZvcgvÎvq| ZvcgvÎv T KZ? [RU 17-18; DU 11-12] 2000 K 1800 K 1200 K 1500 K DËi: 1800 K e ̈vL ̈v: T2 T1 = T2  T1   400 800 = 900 T  T = 1800 K
ZvcMwZwe` ̈v  Varsity Practice Sheet 3 17. 0C ZvcgvÎvi 273 kg eid‡K 0C ZvcgvÎvi cvwb‡Z iƒcvšÍi Kiv n‡j G›Uawci cwieZ©b KZ n‡e? [eid Mj‡bi Av‡cwÿK myßZvc n‡jv 3.36  105 J/kg] [DU 16-17] 917.28  105 J/K 3.36  105 J/K 273  105 J/K 0 J/K DËi: 3.36  105 J/K e ̈vL ̈v: S = mLv T = 273  3.36  105 273 = 3.36  106 JK–1 18. GKwU Kv‡b©v Bwćbi Rb ̈ hw` Zvc Dr‡mi ZvcgvÎv AcwiewZ©Z †i‡L Zvc MÖvn‡Ki ZvcgvÎv ax‡i ax‡i Kgv‡bv nq, Zvn‡j Bwćbi Kg©`ÿZv †Kgbfv‡e cwiewZ©Z n‡e? [DU 15-16] e„w× cvq AcwiewZ©Z _v‡K Kg‡Z _v‡K ejv m¤¢e bq DËi: e„w× cvq e ̈vL ̈v:   1 – T2 T1 T1 w ̄’i †i‡L T2 Kgv‡bv n‡j we‡qvMdj †ewk nq d‡j  e„w× cvq| 19. 33% Kg©`ÿZvm¤úbœ GKwU Zvc Bwćb 9.0  104 J Zvckw3 mieivn Kiv n‡jv| BwÄbwU KZUzKz Zvckw3‡K Kv‡R iƒcvšÍwiZ Ki‡Z cvi‡e? [DU 14-15] 3000 J 8400 J 30000 J 1000 J DËi: 30000 J e ̈vL ̈v: W = Q1 = 0.33  9  104 = 1 3  9  104 = 3  104 J 20. mycviKÛv±i mvaviY KÛv±‡ii †P‡q †ewk myk„•Lj| hw` mycviKÛv±i Ges mvaviY KÛv±i Ae ̄’vq G›Uawc h_vμ‡g Ss Ges Sn nq Z‡e wb‡¤œi †KvbwU mwVK? [DU 13-14] Ss = Sn Ss > Sn Ss < Sn Ss  Sn DËi: Ss < Sn e ̈vL ̈v: entropy = wek„•Ljvi gvÎv Ss < Sn myk„•Lj wek„•Lj weMZ mv‡j GST-G Avmv cÖkœvejx 1. †Kvb ZvcgvÎvq †Kjwfb I dv‡ibnvBU † ̄‹‡j GKB cvV cvIqv hvq? [GST 23-24; JU 18-19; JUST 15-16; RU 14-15] 574.25F 273.16 K 374.25F 375 K DËi: 574.25F e ̈vL ̈v: TF – 32 9 = TK – 273 5  5 (TF – 32) = 9 (TF – 273)  TF = 574.25F 2. mg-AvqZb cÖwμqvq wm‡÷g KZ...©K M„nxZ Zvc Q n‡j AšÍt ̄’ kw3i e„w×i cwigvY n‡eÑ [GST 22-23] – Q 0 Q 2Q DËi: Q e ̈vL ̈v: mgAvqZb cÖwμqvq, V = 0 nIqvq W = 0  Q = U  U = Q 3. ZvcMwZwe` ̈vi cÖ_g I wØZxq m~‡Îi mgwš^Z mgxKiY †KvbwU? [GST 21-22] TdS = dU – VdP TdS = dU – PdV TdS = dU + VdP TdS = dU + PdV DËi: TdS = dU + PdV e ̈vL ̈v: dS = dQ T  dQ = TdS Avevi, dQ = dU + PdV  TdS = dU + PdV 4. GKwU Kv‡b©v P‡μ mgZvcxq I iæ×Zvcxq cÖwμqvi msL ̈v h_vμ‡g †KvbwU? [GST 21-22] 1, 2 3, 1 1, 1 2, 2 DËi: 2, 2 e ̈vL ̈v: Pvc, P AvqZb, V A T1 Q1 Q2 (P1, V1) m‡gvò †jL B (P2, V2) m‡gvò †jL iæ×Zvcxq †jL D (P4 , V4 ) (P3, V3) iæ×Zvcxq †jL T C 2 wPÎ: Kv‡b©v Pμ
4  Physics 2nd Paper Chapter-1 5. †Kvb Ae ̄’vq GKwU e ̄‘i GbUawc me‡P‡q Kg _v‡K? [GST 21-22] evqexq Zij KwVb cøvRgv DËi: KwVb 6. GKwU Kv‡b©v Bwćbi Zvc Drm I Zvc MÖvn‡Ki ZvcgvÎv h_vμ‡g 327C I 127C| BwÄbwU Zvc Drm †_‡K 4500 J Zvc MÖnY K‡i wKQz Zvc Kv‡R iƒcvšÍwiZ K‡i Ges Aewkó Zvc MÖvn‡K eR©b K‡i| ewR©Z Zv‡ci cwigvY KZ Ryj (J)? [GST 20-21] 1500 2000 2500 3000 DËi: 3000 e ̈vL ̈v: Q1 Q2 = T1 T2  4500 Q2 = 327 + 273 127 + 273 = 600 400  Q2 = 3000 J weMZ mv‡j Agri-G Avmv cÖkœvejx 1. GK Kvc cvwbi ZvcgvÎv 100C †_‡K 35C G bvgv‡bv n‡jv| dv‡ibnvBU † ̄‹‡j Gi cwieZ©b KZ n‡e? [Agri. Guccho 21-22] 117F 122F 273F 98F DËi: 117F e ̈vL ̈v: TC2 – TC1 = 5 9 (TF2 – 32) – 5 9 (TF1 – 32)  TC = 5 9 TF  TF = – 65  9 5 = – 13  9 = – 117F  |TF| = 117F 2. Ne M ̈v‡mi †ÿ‡Î  Gi gvb KZ? [Agri. Guccho 21-22] 1.33 1.40 1.67 1.76 DËi: 1.67 3. Kv‡b©v P‡μ GbUawci cwieZ©bÑ [Agri. Guccho 21-22] k~b ̈ n‡Z Kg k~b ̈ k~b ̈ n‡Z †ewk Amxg DËi: k~b ̈ 4. GKwU ÎæwUc~Y© _v‡g©vwgUv‡ii eidwe›`y 5C Ges w÷gwe›`y 99C| hLb G _v‡g©vwgUv‡i 52C cÖ`k©b K‡i ZLb dv‡ibnvBU † ̄‹‡j ZvcgvÎv KZ? [Agri. Guccho 20-21] 132F 122F 302F 322F DËi: 122F e ̈vL ̈v: 52 – 5 99 – 5 = TF – 32 180  47 94 = TF – 32 180  TF = 1 2  180 + 32 = 90 + 32 = 122F 5. GKwU Mvox Pj‡Z _vK‡j Zvi Uvqv‡ii wfZi wKQz ZvcMZxq cÖwμqv P‡j| GB cÖwμqvwU njÑ [Agri Guccho 20-21; KU 18-19, 07-08; MBSTU 15-16] m‡gvò cÖwμqv (Isothermal process) iæ×Zvcxq cÖwμqv (Adiabatic process) aaæe AvqZb cÖwμqv (Isochoric process) aaæe Pvc cÖwμqv (Isobaric process) DËi: aaæe AvqZb cÖwμqv (Isochoric process) e ̈vL ̈v: Mvwo Pj‡Z _vK‡j Ñ mgAvqZb cÖwμqv Uvqvi †d‡U †M‡j Ñ iæ×Zvcxq cÖwμqv KviY Mvwo Pj‡Z _vK‡j Uvqv‡ii g‡a ̈ M ̈v‡mi AvqZb aaæe _v‡K| 6. M„nxZ Zvc I ewR©Z Zvc h_vμ‡g H1 I H2 n‡j Zvcxq Bwćbi `ÿZv KZ? [Agri. Guccho 19-20]     1 – H2 H1     1 – H1 H2     1 + H2 H1     1 + H1 H2 DËi:     1 – H2 H1 e ̈vL ̈v:  = 1 – H2 H1 =     1 – Kg ZvcgvÎv ev Zvc †ewk ZvcgvÎv ev Zvc [g‡b ivLvi Rb ̈] weMZ mv‡j JU-G Avmv cÖkœvejx 1. Zvc cÖ‡qv‡M Zij cÖmvwiZ Ges nvjKv n‡q Dc‡i D‡V hvq| wKš‘ Dc‡ii kxZj I Nb Dcv`vbwU wb‡P Wz‡e hvq| GwU Kx wn‡m‡e cwiwPZ? [JU 22-23] cwiPjb cwienY wewKiY †Kv‡bvwUB bq DËi: cwiPjb e ̈vL ̈v: Zij c`v‡_©i Zvc cwienbB g~jZ cwiPjb| 2. GKwU K‡ÿ ZvcgvÎv 30C, dv‡ibnvBU † ̄‹‡j Gi gvb KZ? [JU 22-23] 86F 80F 73F 68F DËi: 86F