THI THỬ LÝ L1 -2013 (CHUYÊN SPHN)

- PHAN crruNc cHo rAr cA cAc rHi sINH (40 c6u, tir c6u 1 il6n c6u 40) Cffu 1: Cho mQt mach dao ddng LC li tu6ng, cuQn dAy c6 dQ tg cAm L = 4ltH.
- dong cliQn trong m4ch c6 gi| tri bing m6t ntra gi6,tri cuc dai cria n6 vir c6 dQ lcrn dang tdng.
- C6u 2: MOt con lic lo xo gOm ld xo c6 dQ cring k: 100 N/m vd qu6 cAu nho duoc dd.t tr6n mit bdn.
- i crni;?il;i ajan i = o bu6ng nhe quA cdu d€ n6 dao dQng diOu hda,.
- C.6u"t -3: p4t flan 5p mQt chi6u 12 V vdo hai dAu doan m4ch'g6m didn tro R mlc nOi tiep vsi m6t cue,n.
- Dat vdo hai'dAu doan 3?.1, di6n 6p xoay chidu zt = 200J*2cosl00zt (V).
- EiQn 6p hiQu dung gifia hai dAu di6n trcy vd gifra hai d6u cu6n dAv lAn lucrt ld 60 V vd 160 V.
- Dong diQn ch4y qua doan mach c6 culng dQ hiQu Oung fa 3A,.
- B' Ddng di€n xoay chi6r{m6t pha chi c6 th6 do mrly ph6t diQn *ouy.Uie,, m6l pfra t4o ra..
- Chi c6 ddng xoay chiAu ba pha moi t4o ra ducrc tu tru*tg quuy..
- Dong di6n do mdy phttdiQn xoay chiAu tao ra lu6n c6 tAni6-Uag sO vdng quay trong mQt gidy cria rdto..
- CAu"8: Doan mach mlc n6i ti€p g6m mQt diQn tro thuAn R : 50f), mQt tp rliQn c6 di6n dung C vd mQt cuQn ddy thudn c6Lm c6 dq tu cdm L tha1, d6i duoc,.
- EiQn 6p xoay chiAu eet uao fruijAi J"a".
- di6n trong do4n mach cirng pha vdi diQn 6p gita hai dAu doan mach.
- Khi thay d6i dO tu cim t6i gi6 trf L, =2 H thi rtiQn 6p hiQu dung gifra hai dAu cuQn cAm dat gi6 trl cuc dai.
- TAn s6 f co gi6 tri.
- Ciu 9: Trong m4ch dao dQng LC c6 dao dQng diQn tit tg do, bi6u thirc cira cudng clQ dong diQn qua mach ld i : 4.
- Ciu 10: M4ch xoay chidu RLC c6 diQn 6p hiQu dpng o hai ddu doan mach kh6ng AOi.
- thay d6i di€n tro R dO dd c6ng suAt ti6u thu cira do4n mqch d4t cqc d4i..
- thay d6i d0 tu cAm L dC diQn 6p hiQu dung tr6n cuQn cdm d4t cr,rc d4i..
- thay d6i tAn sO f AC diQn 6p hiQu dpng tr6n tu d4t cr,rc d4i..
- Cffu 11.: R6to cira m6y ph6t diQn xoay chiAu mQt pha ld mdt'nam chAm c6 4 clp cuc tu, quay vtii t6c dg 1500 v.ong/ph.
- SuAt di€n dQng c6m rmg hiQu dung do mtry tao ra ldr.
- Diqn 6p xoay chiAu d{t vdo hai dAu do4n m4ch c6 giittri hiqu dgng li 150 V, tAn sd 100 Hz.
- Dong di€n chay trong mach co giittri hiOu dpn92 A,.
- I so v6i dong diQn xoay chi6u chay qua B.
- DiQn 6p gifta hai dAu cuQn d6y thuAn cdm nhanh pha.
- Ddi v6i ddng diQn xoay chiAu, cuQn ddy thuAn cAm c6n tro dong diQn vd su cdn tro d6 tdng theo tiin s0 cria ddng diQn..
- Ddng di6n xoay chiAu ch4y qua cuQn ddy thuAn c6m kh6ng gdy rasg to6 nhiQt trdn cudn c6m..
- Chu kj' ri6ng chi phr,r thuQc vdo d{c tinh cria hQ dao dQng..
- Bi€ndQ dao dQng cu0ng bric chi phg thuQc vho biOn dQ cirango.4r lqc tuAn hodrn.
- Ciu 15: MQt con l6c lo xo dang dao dQng di6u hoa thi v6t ndng va ch4m v6i mQt v4t nho.
- chu ki dao dQng giAm trong trubng hqp va cham tldn h6i..
- chu ki dao dQng tdng trong trudng hqp va ch4m m6m..
- chu ki dao dQng ginm trong trulng hap va ch4rn m6m..
- Ciu 17: Trong dao dQng tU duy tri, biOn d0 dap dQng cria hq phU thu6c viro A.
- Ciu 18: MQt chAt ditim dao dQng di€u hda v6i phucmg trinh: x.
- vAn t6c cira chdt di€m ld.
- Chu22: Ph6t bi€u ndo sau d6y kh6ng dring.
- Ddt vdo hai dAu do4n m4ch RLC kh6ng ph6n nh6nh - mQt dign itp xoaT,chidu c6 tan s5 rhay d6i duoc.
- Cho tAn s6 thay AOi Aen gi6,trif0 thi;;crng d6 hi€u dung ctia dong aign dat gii,tri cuc dai.
- di€n 6p hiQu'dpng gifra hai ddu R ldn hcrn di€n 6p hiQu dung tr6n tu c..
- di6n 6p hiQu dung 6 hai.dAu cudn cdm L vd o hai dAu tu c lu6n bang nhau..
- diQn aptuc thoi d hai dAu diQn trd thuAn lu6n bing di6rr 6p tfc thdi gifta hai dAg doan mach..
- CjlZ:: tvtQt m4ch dao dQng gdm mQt c.uqn ddy c6 dQ tu cAm 4 prH vd mQt tp diQn c6 di6n dung 2000 pF.
- NOu mach c6 diQn tro thuAn 0,1 f) thi d6 duy tri dao dQng trong mach thi phii cung cAp cho mach mdt ndng luqng cd c6ng suAt bing.
- C.kw25: Di-€n ndng o mQt tram ph6t diQn duoc truy€n di du6i diQn 6p (o dAu ducrng dAy tni) la 20 kV,.
- lu6n hudrng vA v! trf cdn bdng vd c6 dQ lon kh6ng d6i..
- lu6n ngugc pha voi v{n t6c vd c6 dQ lon ti lg v6idQ l6n li dq cria v6t..
- Ciu'29: MQt 6ng khi c6 mQt dAu bft kin, mQt dAu ho t4o 1a Am co bin c6 tAn s6 ll2 Hz.
- Ciu 30: M6t.doan mach g6m mQt d6ng co diQn mic nOi ti€p vdi m6t cu6n dAy rOi mic vao ngudn diOn xoay chiAu.
- dong diQn qua dQng co c6 criong.
- dO hiQu dtng bing 40 A vd chAm pha mdt g6c gr = L ,o vsi di6n 6p giira hai dAu d6ng co .
- DiQn 6p.
- chay qua n6.
- Di€n 6p hiQu dung giira hai dAu do4n m4ch lh.
- Sau va ch4m, vat m dao dQng 't Oi Uietr A6 ta.
- Bitit trong m6t chu ki cira dong diQn ddn sang vd t6t hai dn.
- Ciu 33: Dao dQng cria m$t vat le t6ng hop c&a hai dao ,J6ng <tiAu hoa c6 phuong irinh iin luor ld:.
- Tai thdi di€m d6 Q s€ c6.
- C6u 35: MQt vAt dao dQng di6u hoa tr6n m6t qu! d4o ld mdt doan thang dAi 12 cm, vdi chu ki 2 s..
- Cdu 38: Trong thdng tin li6n lac bing s6ng di6n tu, sau khi trdn tin hiQu Am tAn c6 tAn s6 q v6i tin.
- hieu dao ddng.cao tAn c6 tAn s6 f fti6n di6u bi6n dO) thi tin hi6u dua d6n ingten ph6t bi6n thlen tuAn hoan voi tAn s6.
- t, vd bi6n d0 bi6n thi6n theo thdi giarv6i tAn s6 bing f..
- f vd biOn dO bi€n thi6n theo thoi gian vOi tAn s6 bing f"..
- Ciu 39: Cuong dQ ddng diQn tric th<ri chgy qua m6t doan mach xoay chiAu ld i :2cos100nt (A).
- T4i thoi di6m tr, dong diQn dang'gi6Lm vd c6 cuqng Aq ting lA.
- Ei6m dao dQng.ngoo.
- 0, ddy treo nhe, c6ch di€n, chi6u ddi l.
- Chu ki dao dQng cria con l6.c duoc x6c dfnh bing bi6u thric:.
- Ciu 42: Dat diQn iip xoay chi6u c6 gi6 tri hi6u dung220 V vho hai dAu mQt hQp den X thi cldng diQn chay qua X c6 cudng dQ hiQu dung ld 0,25,A vd dong di6n scrm phanl2 so v6i diQn 6p giaa hii OAu.
- Cfrng dat di6n 5rp d6 vdo hai dAu hQp den Y thi dong di€n chay qua f u6".
- hi6u dung \d,0,25 A nhung ddng diQn cung pha voi diQn ap giea hai dAu hdp ien y.
- tr€n viro hai dAu doan mach gdm X vd Y mAc n6i ti6p thi dOng diQn tron! cloan mach c6 cuong d6 hi6u dung ld.
- Ciu ,{3: Ph6t bieu ndo sau day Ia dung'i.
- A- Nguoi ta c6 th6 tao ra til truong Oqay bing ciich cho dong di€n xoay chi6u mQt pha chay qua ba cuQn ddy cira stato cira dQng co kh6ng d6ng bQ ba pha,..
- C.'Nguoi ta c6 th6 t?o ra tu truong lqay bang c6ch cho cidng diQn xoay chi6u ba pha chay qua ba cudn ddy cira stato cira d6ng co kh6ng d6ng b.Q ba pha,..
- Ngudi ta c6 thd tao ra tir truong quay bang c6ch cho dong diQn xoay chiAu chay qua nam ch6m di€n..
- CAu 44:Dat dien 6p xoay chiAu u: UocoSCDt (V) vdo hai dAu mQt tu dien co dien dung C = ll ' f,.
- gi6 tri cria di€n 6p ld u1 : 100.6 V vA dong di6n trong mach lii.
- DiQn 6p cuc dai giira hai dAu tp diOn ld A.
- dAy tai di€m M c6ch.
- S6ng diQn tri lir s6ng ngang.Tron g qu|ftinh lan truy6n s6ng di€n tir thi di6n truong bi6n thiOn vd tir trudng bi6n thi6n dao dQng cung phucrng vd, cung vu6ng g6c v6i phucrng truyAn s6-ng..
- D6 le soirg di€n tir..
- S6ng di€n tu mang ndng luqng.
- S6ng di€n tu lan truyAn v6i v4n t6c rit 16n.
- Cfru 47: M6t doan Tach g6rn di€n tro mic n6i ti6p v6i mdt cudn dAy.
- Ddt vAo hai dAu dopn m4ch.
- T?t 9ie:.1p xoay chi6u.c6 giri trf hiQu dpng bing 100.V.
- DiQn 6p hiQu dung gifra hai dAu diQn trd vd.
- gita hai dAu cu6n dAy l6n luot ld 30 V vd 80 V.
- nghe cdng trAm khi bi6n d0 6m cdng nh6 vd tAn s6 am cang lcrn.
- cii dm sac phq thudc vdo dang d6 thi dao dQng cua dm..
- Ciu 49: M6t con l6c lo xo c6 dQ cimg k:20N/m dao dQng di6u hoa vdi tdn s6 3 Hz"Trong mQt chu.
- ki, klrodng thoi gian d6 vat c6 dQ lon gia t6c kh6ng vugt qu6 360Ji (cmls2) fa ] 9 s.
- Ndng lugng dao dQng lA.
- C.au.50: MQt b6ng ddn ddy t6c lo4i 110V-60W, c6 d0 tg cim cira ddy toc nho kh6ng diing k6, mac n6i ti€p vdi mQt cudn ciim thudn c6 dQ tg cim L vdo ngu6n di6n xoay chi6u c6 diQn 6p hiQu dpng U.
- r20 v , tan s6 f : 50 Hz.
- ciu 56: MQt m4ch chon s6ng g6m mQt cu6n cdm L: 4 pF vitmQt tp di€n c6 di6n dung bi6n d6i tu Cr : 10 pF ddn Cz:'490 pF.
- mQt nhenh 6m thoa fao-fqne di6u hda,h."o ply*.e^ vu61e g6c vcri scri day