TRAO »0I VI CAC THI NCHliM VAT l i idP 7 m^P THEO sfi 94) i^ jfS Clu 1 Trang 71 cd bdi tap ty dupc mdc dung chiiu Nhung lugn 14 "Cd m$t so dh mgch nlu hipu difn thi dii dl ldm dipn d hinh ve ben Hay c[.]
TRAO »0I VI CAC THI NCHliM VAT l i idP m^P THEO sfi 94) -i^-jfS Pham Dinh Cihmg Clu 1: Trang 71 cd bdi tap ty dupc mdc dung chiiu Nhung lugn 14: "Cd m$t so dh mgch nlu hipu difn thi dii dl ldm dipn d hinh ve ben Hay cho sang dupc till Led se bi hdng i^ay mgch khdng cd bilt: a Bp phgn ndo cda mgch difn trd hgn che ddng dipn qua dipn dupc mdc vao hai diem Led Chiing ta khdng nen bai tap nhu tfal ndy vi se ldm A,B? b Dilm B dupc nli vdi cho HS chi bi^ li thuy€t mpt bdn kun logi to hay bdn kim cdch hdi hpt, khdng biSt den togi nhd ciia den Led? Vi sao?" tinh chdt cda Led Cdu trd ldi b la dung ni$c Dap dn ciia bdi ndy d trang 156 cd vilt: du mau thuan vdi dieu tac gid "a Vi mgch dipn cd vilt nhdc nhd HS chii ;y^ d trang ddng cKpn nen bp phgn cdn 16,vidrtrang 16 tdc gid vilt: tiiilu dupc mdc vap hai dilm Trong bp thi nghipm (TN) V$t 11 ldp bdn kim logi to Id cyc AiBldngulndipn b Vi ddng dipn di qua den duong cua Led, ddng dipn dl Ledtiieoehilu tii bdn kim logi td bdn kim logi to sang bdn nhd sang bdn kim logi to kim logi nhd, ^ n nen bdn kim logi nhd dupc Cau 2: Trang 77 cd bdi nli vdi dilm B cua den." tgp trdc nghipm 7: "Diing biia Xin cho bilt y kiln vl bai cao su gd nhp vdo mpt nhdnh cua am tiioa ta nghe dupc am phdt Trong trudng hpp ndy -1 Lea 1( K thi nguon am Id: ' a Tayta b Chile biia —>c Khdng xung quanh B JJ„)1J(,3 Hhihl d Am thoa." TH IM: Trong thyc te, Ddp an bdi d trang chiing takh&ng dupc mdc m^ch di^n khdng co di^n tro h ^ chl ddng cho Led nhu hinh Nlu hi?u dipn thi ngu6n di?n thip hon di^n dp md cda Led thi Led khdng sdng dupc nlu 163 vilt: "Phuang dn sai: a, b \d trudng hpp ndy tay ta va chiec biia khdng phdi Id ngudn dm nen chiing khdng dao dpng " Xin cho biet f kiln v£ cdu ciia ddp dn Tra \iA: Cdch viet tiong ndy khdng chuin, khong phii hpp vdi diu bdi Ddng is phdi viet; VI tay ta vd chi€c bua khong dao dpng nen ehung khong phdi Id : am; GV nen hilu dl khdng ySu cau Id: tay vd biia cd dao dpng hay khong Cau 3: Trang 88 c6 bdi t^p trdc nghidm 8: "So d6 m^h d i ^ ndo sau ddy vS diing cdch mdc am pe ke de cufmg dO dong di^n di qua d^n?" (hinh 2) Xui cho bilt ^ kiln vh ddp dn cua bdi ndy o trang 178 TH IM: Ddp dnduang 178 tdc gid chi noi cdch mdc am pe kIdsodoCvdDldsaiviampe ke mdc song song vdi den vdd so D cdn sai d ch3 Id khdng t^ cvc duong cua am pe kl Mfl W ng^y 30/6/2013 • Ngiy duyil ddng 25/7/2013 TAP CHl THI^BIGlAO Dgc-sd 96-8/2013 • SI ve phia cue duong cua ngudn dipn Nhung cd dieu sai quan trpng d so C vd D Id am pe kl mdc ndi tiep vdi ngudn dien thi tdc gid khdng bilt Tiong bdi t$p trdc nghipm 11 trang 89 d so dd D (Hinh 3) vd bdi trang 100 d so D (Mnh 4) ciing cd ve am pe ke mdc ndi tiep vdi nguon dipn nhu d so dd C va D cua l>di Thvrc tS d cdc ldp t§p huan mdn Vdt U mdy ndm viia qua nhieu GV v$t U THCS cung hay mdc sai am pe kl m^ch nhu the nay, chiing ta khdng dupc mdc nhu hinh tien vi de ldm hdng am pe kl Ciu 4: Trang 89 cd bai l$p&3c nghipm 13: "Hai den Led cua bp TN Vftt li ldp dhinh dang phdt sdng Cdc bdn kim lo^ nhd ciia hai d ^ dupc noi vdi cdc diem a.AvaC b.BvaD v.AvaD d.BvaC." Hmh Ddp dn d trang 181 vilt: "Thuong dn dung: b, vi den di dt phdt quang (Led) ciia bp TN Vdt h ldp chi cho dong dipn di qua theo mdt chieu nhat djnh til bdn kim lo^ to sang bdn kun lo?i nhd Vi v|y cdc ban kim lop nho cda hai den phdi dupc ndi vdi cdc diem B vd D." Ddp dn ndy diing vdi dieu viet nhdc nhd phdi chii y d trang 16 nhung trdi vdi cdc di dt tren the gidi, vdy ddp dn CO dling khdng? Tra IM: Ddp dn ndy sai vi bp dvmg cu TN V$t h Idp ciia cdc cdng ly Thilt bi Gido dyc nudc deu dimg di dt dang luu hdnh tren th) trudng la cho ddng dipn di tii ban kim loai nhd sang ban kim lo^ to Bdi tap tide nghipm 13 trang 93 (Hmh 6), bdi 12 trang 97 (Hmh 7) vd bdi 13 hang 101(Hinh 8) ciing cd ddp dn d trang 187,193 va 201 sai nhu B c Hinh7 52 • TfP CHt THlfrB(GlAO Dgc-5096-8/2013 Sihh'S v§y vi tdc gid hilu nhiim vl di dt bp TN V^t li ldp Cau 5: Trang 92 cd bai ttp trdc n ^ p m 7: "C^ am pe kl vdi gidi han Idn lupt Id: 300mA; IA; 2,5A; lOA Dl cudng d$ ddng di$n 1,3A ch^ qua m$t bdng £feithiiUi hpp nhlt Id diing am pe kl cd gidi h ^ a SOOmA b IA c.2,5A d.lOA" Ddp an bdi ndy d trang 184 cd vilt: Phuong dn b sai vi diing am pe ke cd gidi h ^ lAde ddng d i ^ l,3Athi am pe ke bi chdy, dieu ndy cd dling vdi thyc tl khdng? Tri IM: Trong thvrc tl nlu dimg am pe kl cd gidi l^in IA dl ddng di$n 1,5A thi khodng thdi gian mdt vdi phiit am pe kl tiong tnidng hpp ndy cung khdng bi chdy Neu diing thang ddng d i ^ ciia d6ng h6 v ^ ndng hipn s6 trudng hpp ndy thi dong hd cung khdng bi chdy md chi diit clu chl bdo vp ^ u (vi cau chl ndy nhd sdn xult thudng diing lo^ 0,23A) Chl cd trudng hpp ddng dipn Idn hon gidi h ^ cua am pe kl rlt nhieu lan thi am pe kl mdi bi chdy Trong thvic tl am pe kl khdng bi chdy nhung khdng dupc dimg am pe kl cd gidi h ^ thip hon ddng d i ^ djnh HS it duprc Idm TN dli GV phdi cung d p nhihig kiln thilc dling thvic tl de trang bi von hilu biet cho HS, khdng nSn tudng tupng cdc vln de TN (Xem tiip kl sau ) ... tap tide nghipm 13 trang 93 (Hmh 6), bdi 12 trang 97 (Hmh 7) vd bdi 13 hang 101(Hinh 8) ciing cd ddp dn d trang 1 87, 193 va 201 sai nhu B c Hinh7 52 ã TfP CHt THlfrB(GlAO Dgc-5096-8/2013 Sihh''S... Sihh''S vĐy vi tdc gid hilu nhiim vl di dt bp TN V^t li ldp Cau 5: Trang 92 cd bai ttp trdc n ^ p m 7: "C^ am pe kl vdi gidi han Idn lupt Id: 300mA; IA; 2,5A; lOA Dl cudng d$ ddng di$n 1,3A ch^ qua