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[.]
Trang 1CHE 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
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
1 Dft vin de 2.1.Cdu tgo cda bp thi nghipm Thilt bj thl
Nfi dung " Djnh lugt edm flmg difn tfl " Uong nghifm do 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 trong thyc te Phdn kiln thflc " Djnh + Hal vdng hemhom : Bdn kinh R = dem, s l luft cdm flng difn tfl " cd ngi dung nhu sau: vdng ddy N = 150 vdng
_ _ AO ^^^^^^ Ciic vdng ddy cd s l vdng vd bdn kinh khde
°~ At
-Vdi: 0 = 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 8 ndm 2011, chflng tdi
nhfn thiy: Cdc bf thi nghifm truyln thing vl hifn
tugng cdm flng difn tfl diu khdng khdo sdt dugc mli
quan hf djnh lugng gifla cde dgi lugng vft ly hong
hifn tugng cdm flng difn tfl
Trudc thyc Ugng TBTN nhu trSn, chflng tdi dd
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 cdm fltng tfl vd vecto
phdp tt^ln cfla vdng ddy
2 Thilt kl, chltvo bf thf nghifm vl 6\nh luft
cim Ang difn ti^
Hinh 2: Cupn hemhom
OmMLsuJ
(a)
Hinh 3: Cac cuqn day co so vong va ban kinh khac nhau (a,b,c)
DSc di^m tir tniftng trong I6ng cu?n hemhom khi sir dyng mdy phdt tan s6 :
TfP CHt TlflCrBIGlAO DMC-Sd 122-10/2015 • 2]
Trang 2tfl 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
Dlthi(B,t)
2.2.Cdc thf nghipm dugc tiin hdnh v&i bp thi
nghipm
2.1.1.SU dgng TBTN di tiin hdnh thi nghipm
"Chung minh dp ldn sudt dipn dpng cdm ung ti lp
thupn vcd sd vdng d^ ":
Sfl dyr^ cdc cufn ddy cd cflng bdn khih nhung
s l vdng khdc nhau Kit qud thi nghifm:
Sdv6ngdAy
KlCmV)
N
Trong gi6i h
Nl-SO
124
2,48
^n sai sd ch
N2 = I00
239
2,39
0 ph^p ta thj
N3 = ISO
361
2,41
ay
M
N
eJ(mV) Bdn kinh RI = 3,lnn R2 = 4^in- R3 = S,4cni 117,67
12,24
Trong gidi hgn sai so cho phSp ta thdy
J-^=: const <^ -—5^= const
R* S
lugn: df ldn suit difn dfng cdm img tl tf
thufn vdi difn tich vdng ddy
2.2.3 Sir dgng TBTN di tiin hdnh thi nghiim
"Chirng minh dp ldn sudt dipn dgng cdm irng ti li thugn vdi cosa":
Sfl dyng cdc cufn day cd cflng s6 vdng, bdn kinh
nhung v6i cdc gdc a khdc nhau
Ket qud thi nghifm: C6ca
Kl(mV)
|cosa{
a l - 0 0
116
ue
112-200
111
118,124
a3=30a
103
118,934
Kit lufn: dg Idn suit difn dgng cdm flng ti If
thufn vdi s l vdng day
2.2.2 Sir dgng TBTN de tien hdnh thi nghipm
"Chirng minh dp ldn sudt diin dgng cdm ieng ti lp
thugn vdl dipn tich vdng ddy ":
Sfl dyng cdc cufn ddy cd cflng s6 vdng nhung
bdn kinh khdc nhau
Ket qui thf nghifm:
U • T4P Off THI^BIGlAO DMC-sd 122-10/2015
Trong gidi han sai so cho phep ta thay
TT
Ket lufn: dg Idn suit difn dfng cdm flng ti 1$ thufn vdi |cosa|
3 Ket lufn
Bg thi nghifm cd thl sfl dyng hit sure linh ho^t
tiiy theo ySu ciu vd phucmg phdp gidng dgy: cd thl
dCmg ldm tht nghifm bilu dien cfla gido vifn hofc thi nghifm khdo sdt cho hgc sinh Uong phin kiln thflc " Djnh luft cdm ung difn tfl " trong chuong trlnh v(tt 1^ ldp 11 THPT
Nlu sfl: dyng TBTN dl hgc sinh ty khdo sdt sS gdp phin ndng cao ndng lyc sfl dyng TBTN, ph^ huy tinh tich cyc vd sdng tgo cfla hgc sinh trong qud Uinh hgc tfp
Tdi Ufu tbam khdo
1 Bg Gido dye vd Dao tgo Danh mge tdi thieu
thiit bf dgy hgc /ndn Vgt li - trudng THPT chuyin,
Thdng tu so 38/201 inT-BGDDT ngdy 29/8/2011 ,,
2 Bg Gido dye vd Ddo tgo, Chuang trinh cht^fi
sdu THPT Chuyin - Mdn Vgt li ndm 2009