THr cmr roAN rnBN MTCT LoP t2 -Ydng2 M6n VAt Li - NIm hgc 2015 Ei6m (Bang sd) Di6m @dng chlt) Chfr ,^J kf - zAM giSm kh6o 56 ph6ch (Do chfi tich ban chtim thi ghi) I of gAI (s6* o4 trang) Biri 1: R6t 30(g) nudc n6ng d 990C lAn luqt dd vio cdc chen sri kh6i luqng a5(e) dang nhiet dg 180C cria phdng, 16c nhg vd dAu cho c6n bing nhiet rOi aO sang ch6n titip theo Coi qu6 trinh trao d6i nhiet, nhiQt lugng kh6ng t6a b6n ngoii vd lugng nu6c mat di kh6ng dingtO Xac dinh nhiet clQ cAn bing cira nu6c vd ch6n nu6c dugc d6 sang ch6n thri sau l8c nhg vd d6u cho c6n bing nhiet gi6t nhiet drr.rg ri6ng crianu6c: cn:4200(#), cua c5c sri ld c.:785r J r '' kg.K '' Don vi tinh: NhiQt dQ ('c) Cich eiii KOt oui Bii 2: Dpt diQn 6p xoay chiAu u-200Jicos(100zct)(V) vdo do?n mpch RLC mac niSi titip ei6t R=tOoJ7(O), < ' t.u clipn c6 cliQn d,rrrg thay d6i du-o.c Khi diQn dung diQn 16n luqt h C,=o' (pF) vd (,,.-ff.fuF) thi diQn 6p hiQu dung d hai ddu tu c6 ctng gi6 tri Di6u chinh 7t diQn dung cria t.u cl6n gi6 a) Tinh gi6 tri C6 Co ee aien 6p hiQu dung hai tl6u diQn trd R dpt cyc dpi b) Tinh iliQn luqng chuyi5n qua ti6t diQn ngang ddy d5n ctra mpch diQn ktroang thdi gian tu t16n 0,0042skhi diQn 6p hiQu dUng hai d6u cliQntrdR dat cgc dpi Don vi t{nh: diQn dung(pF); diQn luqng(pc) C6ch K6t qui giii BAi3 ,r Bdi M0t bAn mong ddng ch6t, hinh tarr_ gi6c cdn c6 hai canh b6n ld b : c: VfOt mol ly tucrng bien d6i tir trAng th6i c6 th6 tfch Vr.: 2}(1rt) ... tinh(g.cm2) I= ry tffi ' ) CSch eiii KOt Bdi s Vat m: lgc c6n fj lQ v6i binh phucmg t6c ttQ ctta vdt, hg s6 ry 19 k : 0,002fY] qui 20 0(9) duqc th6 roi kh6ng vpn tdc ban dAu tu mQt noi dri cao Gi6 thiiSt... thdi gian tu hic Uat O6u thi vft ddn klri n6 dpt t6c d0 bAng 75%tdcdQ t6i da Cich ei Bdi hai di6m Sr vd Sz c6ch 12, 5(cm) tr6n mflt ch6t 16ng c6 hai ngu6n ph6t s6ng dao -Tai dQng theo phucmg thing... tucrng bien d6i tir trAng th6i c6 th6 tfch Vr.: 2} (1rt)