- qi.* 3 8^6 qua moi ma s6t va luc cankhdng khi Ti6p;i"6t".e chichiu lu;kd;;6 i a^z,sN. - 1:lg m6t xuong det, cho rdng m6i may d€t gAy ra muc crrorlg d6 Am trung binh tai m6r di€m la 60 dB. - ".ru'.lii,ng cach nhau 1 0 crir. - CAu 4: Trong hi€n tuo-ng giao thoa song.nucrg, hai ngu6n dao d6ng theo phuong vu6ns goc vcri mdt nuoc,. - :1 Tq: d6 truy6n s6ng tr€n mdt nuo'c le 50 cmls. - Coi bi€n do song khong d6i l.1'i ,r"Ver' ji. - ?i:y dung y6n tren duong trdn duong kfnh AB tr€n mdt nuoc xa a"nrrat c6ch A m6t doun^,.a;. - Dong di€n xoay chi6u tAn sO 50 Hz cua mang diQn Qudc gia cfrng tao ra song di€n tir nhung khdng truyOn duoc di xa.. - Song dien tu su dung trong thong tin vfr tru ia song cuc ngdn xuy6n qua duoc tAng di€n ii.. - tr€n phuong ox voi t6c da 6 m/s vcyi bi€n d0 song coi kh6ng d6i va bang 3 cm. - Cdu 7: Doan mach AB g6m doan AN va ltlB mic noi ti€p. - De di6n ap hai dAu tu di€n lech pha 900 so r,6i di6n ap n", aA". - doan mach AB thi tAn sd cua di6n ap Id. - khung d,iy phet qLtay bi€n doi d€u quanh truc nim trong niflt phing cua khung vd vu6ng. - khi C : Cz:6.10-6 F thi diOn ap higu dUng Uerra.o .rng gi6 tri ur. - Khi C: C: :2.'10 u F thi di6n. - buoc song cua cac vach man trong quang pho vach phatxa cua ngu6n s6ng.. - Con lac dao dQng di€u hoa voi bi€n dd goc 0,frad. - Ciu i3: Cho doan mach xoay cirieu AB gdm.dqan AM, NfNI, NB mic ndi tiOp. - Eoan AM chua cudn cAm thuAn, do4n tvtiV.ctrua di€n t.O tf,uAi a"* Nil chua tu di€n. - Ddt vao hai d6u doan mach m6t dien 6p xoay chieu thi diOn 6p giira hai diem AN va Mb vu6ng pha Jr.r, ;d;g ;;i. - Bi0u thuc cua clrong dg dong di6n trong mach la i = 2tl2cos(cttt - n l3)(V).Cdng si-rdt ti€u thu cua doan mach AB ld. - CAai r 14: ,r Mdt J con ldc con tich cii€n ddt irong di€n truong d€u ma vec'ro clrorg d6 di6n rruong co. - Khi kh6ng co di€n trucrng thi chu ki Oao dOng nho cira con 15-c le T0 :2,150 s. - Ngudn s6ng phdt ra 6nh san-9 don s6c co buoc song A,6purt. - ii ig nguyen tir C14:C12 trong mAu xuorig hoa thach lir k, ti 1e dy irong m6t mAu xlrorlg nguoi dang sOnq la k6' voi k : ke.0"739. - Khe S phat ra hai bu'c xa dcyn sdc co buoc so.o 1i,.'. - Ciu 27: Et€n ndng duoc tAi trtrc ti€p tu may phat dien d€n ncyi tiOu thu nho'dAy dAn chi co di€n tro thuAn R = 40O. - No'i ti€u thr-r tiOr-r thu m6t c6ng s.,At 200 kW voi h0 sd cdng suAt bing i va. - Di€n ap hi€u dung hai dAu cuOn so cAp cua m6y bi€n 6p noi phat diOn la. - Cf,u 15: Eoan mach xoay chidu g6m cac phAn tu diOn tro thudn, cudn cAm thudn va tu di€n m6c noi tiep. - Khi gi6 tri cua idn sO 60 Hzva 80 Hz thi 'Ji0n 6p hiQg CUlg hai dAu cuQn chm co cung gi6 tri. - Oe Ciqn 6p hiQu dung hai dAu cu6n cAm cuc dai thi tan sd cira dong diqn trong mach la. - CAu 16: LAn luqt chi€u vio ca tdt cua mOt tO bdo quang di€n cac chirm buc xa don s6c buoc song tuong irng la 4 - 0.+0prrt;),,:0,50pn;1-0,60pnt tlii ddu xay ra hi8n tlrgng quang di6n vo'i hiQu di€n th6 ham tuong ung la Ur, Uzi U:. - Trong citc ghat bi€u sau dAy, phat biOu nao la dirng?. - NOu chi6t suAt cua nu6c dOi vcyi tia do co buoc song dai nhAt la no <. - NOu chiet suAt ctra nudc d6i vo'i tia tim co buoc song ngin nhAt ld n1 >. - Neu chiOt su6t cua nuoc ddi voi tia tim co buoc song.rg6n ntrAt lir n1 <. - CAu 18: MOt doan mach AB gdm tu diOn v2r cudn cAm mic n6i ti€p theo thu tu do. - Ddt vao hai dAu doan mach AB m6t di€n dp xoay chi6u co bi6u. - su6t cua doan mach AB la. - CAu 19: Hai dao d0ng di€u hoa cung phucrng cung tAn sd co li d0 X1 vd x2 thoa mdn:. - cung pha nhau vir cung bi€n d6.. - Cdu 21: Mot chAt di€m dao d6ng di6u hoa trOn truc Ox, g6c O trung vi tri cAn bdng. - di€m ban ddu to : 0 chdt di€m co vAn t6c vs. - Ciu 22zTheo thuyOt luqng tu 6nh ang, phat bi€u ndo sau dAy la sai?. - I0".8 mis2. - Coi bi€n d6 song khdng d6i khi truydn di. - M, N kldng ndm tr€n doan thang AB nhung d6i xring vcvi nhau qu-a tru.ng die.m H cua AB co biOn dQ a + 0. - buoc song gidrm, cuoltg dd Am iang.. - Con ldc dao dQng di€u hoa voi chu ki T. - Bi€t tai thcvi di€m t1 vflt nho co tdc dO 30 cm/s, o thoi diOm tt+3T14 vAt co qia .a .:-1 t6c 6 mls". - Ciu 34: MOt chAt di6m dao dong di€u hoa trOn truc Ox voi chu ki T. - Cdu 35: Laze A phat ra chum biic xa co buoc song 0,5pntvo'i cong suAt 0,6 W. - Laze B ph6t ra chum buc xa co buoc song 0,6pmvoi c6ng suAt 0,4 W. - C6u 36: MOt niach di€ir )ioay chiOr-r AB gOn*r doan AM, i\,OJ, r\B rnac n6i tiep. - Edt vao hai dAu doan mach nQt diqn 6p xoay chiOu co gi6 tri hiOu dung va tAn sO kh6ng d6i thi diQn 6p. - hi€u dpng Unx: 300V. - DiOn ap hiOu dUng hai dAu cu6n cAm xAp xi bang. - Chu ki Cao. - Eiqn dung cua hai tU diqn tuong tmg la C1 vd Cz voi C2:2C1, dQ tr-.t cAm L: 5 mH. - Cuong dQ dong di€n cuc dai qua cudn cam 'rJ Dang. - Ciu 4L: Buoc s6ng cira 6nh s6ng vang trong nu6c bang buoc song cua 6nh s6ng lam trong nu6'c.. - lam co buoc song 0,15pun va dnh s6ng vdrng buoc song 0,60pun. - Tr€n man quan sdt. - Biet goc hqp boi vec tg tflq tdc cua hat X va hucrng toi cira pr6tOn la.53,130. - ti:.i r,'i ii'i i]fi1, i1--,1 tl:aing ciil'i;.g. - Di€n dung c6c t-u di6n tuong ung la Cr vir C2 vo'i Cr: ZCz. - M.4ch thu duoc song di6n tu co buoc song 120 m. - T6c d6 truy6n song tr€n dAy la 20 m/s. - Nguoi tao ra song dung tr€n dAy voi tAn s6 song 50 Hz, thi trOn ddy co 6 nut s6ng k€ ca hai dAu dAv. - ^ic n6i tiiip voi mdt di€n tro thuAn R:20O. - vao hai dAu doan mach mQt dien 6p xoay chiAu thi ddng cosan ra mdt c6ng sr-rat co hoc 240 W. - Di€n 6p hiQu dUng hai dAu doan mach bang. - C4u 50: Mot ch6t di6m dao dong di€u hoa tr6n trr,rc Ox theo phucrng trinh x:6cosal. - K€ ttr tho'i di€m ban dAu d€n luc dQng ndng bdng ba 16n th€ ndng lAn thu 2013 thi ch6t di6m da di duoc mot qudng duong bdng. - CAu 53: Khi ddt vao hai dAu m6t cr-rdn dAy co d0 tu cam 0,41n (H) mdt hi€u diqn th6 m6t chi6u 12 V thi cucvng +0 dong diOn qua cr-r6n d6.y la 0,4 A. - thi vec to vAn toc va gia tdc ciaaat ki mOt di€m nao trOri dia cfrng hqp voi nhau -Ot gOc {S;.. - ti.ing B/3 ldn.. - ciu 60: M6t qud cau bdng D6ng c6 lap vo diQn, ban dAu tich di€n d6n di6n the v0