Chế tạo bộ thí nghiệm cảm ứng điện từ sử dụng từ trường có tần số cao trong dạy học vật lý lớp 11

CHE TAO BO THi NGHIEM CAM ONG Dl |N TlT S 0 DVNG Tir TBUifNG CO T M SO CAO TBONG DAY HQC VAT LI l&f 11 M Blnh Dtfdng THPT Chuyin Chu van An Tlnh Lgng San PGS TS Nguyen Manh Thio Tru&ng BHSP Hd Npi SUM[.]

CHE TAO BO THi NGHIEM CAM ONG Dl|N TlT S DVNG Tir TBUifNG CO T M SO CAO TBONG DAY HQC VAT LI l&f 11 M Blnh Dtfdng - THPT Chuyin Chu van An Tlnh Lgng San PGS.TS Nguyen Manh Thio - Tru&ng BHSP Hd Npi SUMMARY This paper presents the research, design, and mani^acture the laboratory equipment to verify the dependence of electric power magnitude Induced on the colls, the area of wire loop and the angle of the magnetic Induction vector and the normal of the coil in grade 11 th physics teaching Keywords: Mani^acturing and use of laboratory equipment induction using high frequency in teaching at high school Ngdy nhpn bdl: 26/9/2015; Ngdy duyp iSlng: 5/10/2015 Dft vin de 2.1.Cdu tgo cda bp thi nghipm Thilt bj thl Nfi dung " Djnh lugt edmflmgdifn tfl " Uong nghifm chflng tdi chl tgo bao gIm cdc bf phfn chucmg trtnh Vft I^ ldp 11 la mgt phin kiln thflc rit chinh nhu sau: quan Ugng Uong chuong cdm flng difn tfl vd cd rit + Mdy phdt tin sd : 50-lOOHz nhilu ling dyng thyc te Phdn kiln thflc " Djnh + Hal vdng hemhom : Bdn kinh R = dem, sl luft cdmflngdifn tfl " cd ngi dung nhu sau: vdng ddy N = 150 vdng _ _ AO ^^^^^^ Ciic vdng ddy cd sl vdng vd bdn kinh khde °~ At -Vdi: = NBScosa - Neu chl cdm flng tfl qua mgch biln thien thl e , = - ( — ) N S c o s a =*K| = At ^NS|cosa| -Gidsfl: [—-] = const =>|eJ~N,S,|cosa| Qua tim hilu vl thilt bj thi nghifm ddnh cho dgy hgc nfi dung ndy theo danh myc TBDH toi thilu cfla BGD ban hdnh ngdy 29 thdng ndm 2011, chflng tdi nhfn thiy: Cdc bf thi nghifm truyln thing vl hifn tugng cdmflngdifn tfl diu khdng khdo sdt dugc mli quan hf djnh lugng gifla cde dgi lugng vft ly hong hifn tugng cdm flng difn tfl Hinh 2: Cupn hemhom OmMLsuJ Trudc thyc Ugng TBTN nhu trSn, chflng tdi dd (a) nghifn cflu, chl tgo TBTN vl hifn tugng cdm flng difn tfl cho phfp khdo sdt dugc sy phy thufe efla df ldn suit difn dfng cdm flng vdo s6 vdng ddy, difn tich vdng ddy, gdc hgp bdi veeta cdmfltngtfl vd vecto Hinh 3: Cac cuqn day co so vong va ban kinh phdp tt^ln cfla vdng ddy khac (a,b,c) DSc di^m tir tniftng I6ng cu?n hemhom Thilt kl, chltvo bf thf nghifm vl 6\nh luft sir dyng mdy phdt tan s6 : cim Ang difn ti^ TfP CHt TlflCrBIGlAO DMC-Sd 122-10/2015 • 2] Bdn kinh RI = 3,lnn eJ(mV) 117,67 R2 = 4^in- R3 = S,4cni 12,24 Trong gidi hgn sai so cho phSp ta thdy K\ tfl trudng deu nhung cd chilu thay dliiien tyc theo thdi gian + D I thj bilu dien sy phy thufe cdm flng tij Uong Idng cufn hemhdm theo thdi gian: B H J-^=: const