NGHIEN CUU & UNG DUNG CHE TAO VA Sir DUNG THIET Bj THi NGHIEM CAM ONG DIEN TlT CO SUf DUNG MdT Sd 80 PHAN CUA BEP Tir TBONG DAY HOC VAT LJ11 Ddo Thj Thu Tlido, Hoc vien cao hpc BHSP H& N$i PGS TS Nguy[.]
Trang 1NGHIEN CUU & UNG DUNG
CHE TAO VA Sir DUNG THIET Bj THi NGHIEM
CAM ONG DIEN TlT CO SUf DUNG MdT Sd 8 0 PHAN CUA
BEP Tir TBONG DAY HOC VAT LJ11
Ddo Thj Thu Tlido, Hoc vien cao hpc - BHSP H& N$i PGS.TS Nguyen Manh Thio - BHSP HdNpi SUMMARY
This paper presents the manufacture and use ofthe laboratoy equipment that use the shackle from part of the induction cooker to verify) the change of electric power magnitude size when the induction at wirefame.lfie coils,the area of wire loop and the angle alpha change in grade 11th physics teaching
Keywords: The induction cooker, grade 11th physics, electromagnetic induction
Ngdy nh^n bdi: 5/10/2015; Ngdy duyft ddng: 15/10/2015
l.fi$t vdnde
Ci Idp 9 hpc sinh dd dupc hpc ve hifn tupng cdm
ftng difn tft vd da biet: khi so dudng sfic tft xuyln
qua tiet difn cupn day dan biln thiln thi trong cuOn
day xuat hifn ddng difn cdm ftng (DDClT) Bk di Idi
kit lugn ndy hgc sinh dd liln hanh hai thi nghifm ve
sy xuat hifn DDCU trong cupn ddy khi cd sy chuyen
dOng tuang doi gifta nam cham vTnh cim vd cuOn
ddy, vd khi ddng ngdt mgch difn cfia mOt nam chdm
difn dupe d$t ndm yln trude cuOn ddy
Din ldp 11, khi nghien cfiu hifn tupng cdm fing
difn tft, hai TN trln khdng nin liln hdnh lgi md cdn
ddnh thdi gian de tien hdnh cde thi nghifm khdc
nhdm kilra nghifm vi sy xudt hifn ddng difn edm
fing trong mgch fing vdi Iftng cdch ldm biln dli tft
thdng qua mgch gidi hgn bdi mgch difn Dya vdo
bilu thftc tinh tft thdng d> = A'.ff.5.cosa Cdn tiln
hdnh cdc J J kiem nghifm vj^y xudt hifn
cdm ftng tren khung day dan khi dO ldn cfia cdm img
tft B tgi cdc dilm trln khung ddy thay dli, khi s5 vdng N Ihay ddi, khi till difn khung dfiy ho$c gdc a
thay dli
Trudc thyc trgng TBTN nhu tren, chfing toi (ta nghiln cftu, chl tgo TBTN ve hifn tugng cdm ung difn tft cho phep kiim ehung vi sy Ihay doi dp ldn ddng difn cdm ftng khi dp Idn cfta edm ftng tfi £ tgi ede diim Irln khung day thay dli, khi s6 vdng
ddy N thay doi, khi tilt difn khung ddy ho^lc gdc a
thay doi
2 Thiet ki, che tgo b$ thf nghifm vl bifn tupng cdm ftng difn tix
2.1.Thlit bf thl nghidm do chdng tSi chi tp bao gim cdc bp ph^n chinh nhu sau:
Mdy phdt tan s l cao: 2 000 kHz^ 30.000 kHz, bip tft
^^^^Hinh I: hinh dnh ve gong tu cua bip tw
12 • TAP CHl THI^BIGIAO DUC-sd 123-11/2015
Trang 2NGHIEN cuu SilNG DUNG
+ Cac vdng ddy dupc quan bin dSy dlr^ (cd Idp
cdch difn) cd s6 vdng vd bdn kinh khac nhau (dudng
kinh cfta spi day ding Id 0.5mm)
-D$c diem tft truong do gdng tft cua bep tft tgo
ra: khi cung cap difn tft may phdt tan so eao (dgng
xung vudng vd ddng khdng doi), ddng difn di qua
gdng tft sinh ra tft trudng d tan so cao, cd dp Idn
khdng doi ^
2.2 Cdc ihl nghifm dugc tiin hdnh vdi bP thi
nghidm
a Sft dyng TBTN dl kiem nghifm vi sy thay
doi dO ldn DDCU khi dO ldn cdm fing tft B khong
doi ^
Dg ldn cdm ftng tu B tgi tiit difn khung day thay
doi bdng each djch chuyin tinh tien khung day
Kit qua: Khi cho khung ddy lgi gdn th! den sang
hon vd ngupc Igi cho khung ddy ra xa thl din sdng
kim hem
b Sft dyng TBTN dl kiim nghif ra ve sy thay
doi dO Idn DDCU cua khung ddy sinh ra khi tilt difn
S cfia khung ddy thay doi
Sft dyng cdc khung day cd cimg s6 vdng nhung
bdn kfnh khdc nhau
Kit qud: Quan sdt dO sdng cua den khi till difn
S cfia khung ddy thay doi thl cudng dO sdng cfia den
thay doi ti If vdi dO ldn cfia S cu$n ddy ^
c Sft dyng TBTN dl kilm nghifm vl sy Ihay
doi dp I(5TI D D C U cfia khung dSy sinh ra khi sl vdng
ddy N cfta khung ddy thay dli
Sft dyng cdc khung day cd cfing ban kinh nhung
s l vdng khdc nhau
Kel qud: DO sang eua den phy thupc vdo so vdng
ddy cfia khung ddy Khi sl vdng ddy tdng thl din sdng
hon vd ngupc lgi
d Su dyng TBTN dl kiem n^ifm vl sy thay
doi dO ldn DDC U cfia khung day sinh ra khi gdc a
thay dli
Sft dyng cdc khung day cd cfing sd vdng, bdn
kinh nhung vdi cdc gdc o khdc nhau
Ket qud: dp sdng eua din phy thuOc vdo gdc a
Din sdng nhdt khi a = Q° vd dO sdng gidm ddn khi
tdng gdc a
3 Ket lu^n
Ti^ Iheo ylu cdu va phuong phdp gidng dgy, bp
thi nghifm tren cd thl ldm thl nghifm bilu dien cfia
gido viln ho^c Id thi nghifm Ihyc l§p cfia hpc sinh
Irong kien thftc hifn tugng cdm fitig difn tft Ngodi ra
cung dftng thi nghifm ndy eho hpe sinh tham gia xay
Hinh 4: Ket qud thu dugc khi tien hdnh TN vdi gdc
dyng kiln thftc djnh Iu4l Len-xo ve chieu ddng difn cdm ftng mOt each tieh cyc
Nlu sft dyng TBTN dl hpc sinh ly kilm nghifm s5 gdp phan ndng cao ndng lyc sft dyng TBTN, phat huy tinh tich cyc vd sang tgo cfia hgc sinh trong qud trinh hgc t^p
Tii lifu tham khao
1 Bp Gido dye vd Ddo tgo, Danh myc thiit bi
dgy hgc tdi Ihieu cdp Trung hgc phd thdng Thdng lu
sl01/20l0nT-BGDDTngdy 18/11/2010
2 BO Gido dye va Ddo Igo, Vgtlill, ndra 20012
TAP CHf THift B| GlAO DMC - Sd 123 -11/2015 "