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7/30/2019 de kiem tra ly 11 hk1
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b,
C1
C2 C3
I. PHN CHUNG ( tt c hc sinh u phi lm phn ny) (8)Cu 1(1): Pht biu nh lut Faraday v in phn. Vit biu thc tng qut v nu ngha cc i
lng?Cu 2(1): Nu cc loi ht ti introng kim loi, trong cht in phn, trong chn khng v trong chtkh?Cu 3(1): Hai in tch im q1 = 2.10
-2 (C) v q2 = - 2.10-2 ( C) t ti hai im A v B cch nhaumt on a = 30 (cm) trong khng kh. Tnh lc in tc dng ln in tch q0 = 2.10
-9 (C) t ti im Ml trung im ca AB.Cu 4(1): Hai in tch q1 = 2.10
-9 (C), q2 = - 8.10-9 (C) t ti hai im A, B cch nhau a=10 (cm) trong
chn khng. Tm im m cng in trng ti bng khng?Cu 5(1): Mt electron c th khng vn tc u st bn m trong in trng u gia hai bnkim loi phng tch in tri du. Cng in trng gia hai bn l 1000V/m, khong cch gia haibn l 1cm. Tnh ng nng ca electron khi n p vo bn dng. ( me = 9,1.10
-31Kg, qe= -1,6.10-19C)
Cu 6(1): Cho mch in gm ba in tr R1 = 1, R2 = 2, R3 = 4 mc song song vi nhau. Tnh
in tr tng ng ca on mch.Cu 7(1): Cho mch in kn gm ngun in c sut in ng =6V, in tr trong r=2 , mchngoi gm 3 in tr R1 =5, R2 =10, R3 =3 mc ni tip. Tnh hiu in th gia hai u R1.
Cu 8(1):Cho mch in nh hnh v . Mi pin c sut in ng = 1,5 (V), in trtrong r= 1. in tr mch ngoi R = 3,5 . Tnh cng dng in mch ngoi.
II. PHN RING (Dnh cho hc sinh hc chngtrnh chun). (2)Cu 9(1): Chiu dy ca lp niken ph ln mt tm kim loi l d = 0,05mm sau khi in phn 30pht.Din tch mt ph tm kim loi l 30cm2. Tm cng dng in chy qua bnh in phn. Cho bit
niken c khi lng ring = 8,9.103
kg/m3
, A = 58g/mol v n = 2.Cu 10(1): Mt m in c hai dy dn R1 v R2 un nc. Nu dng dy R1 th nc trong m ssi sau thi gian t1 = 10 (pht). Cn nu dng dy R2 th nc s si sau thi gian t2 = 40 (pht). Hi nudng c hai dy mc song song th nc s si sau thi gian bao lu (b qua s ta nhit ra mi trngxung quanh v gi s in tr ca cc dy dn khng thay i theo nhit ).
III. PHN RING (Dnh cho hc sinh hc chng trnh nng cao). (2)
Cu 9(1): Cho 3 t in mc nh hnh v. C1 = 3 F, C2 = C3 = 4 F. Ni haiim M, N vi ngun in c hiu in th U = 10V. Tnh in dung v intch ca b t in
Cu 10(1): Cho mch in nh hnh v :
b=12V , rb=1, R1=1, R2=2. R3 thay i c.Tm R3 cng sut tiu th trn R3 l ln nht.
S Gio Dc v o To Tha Thin HuTrng THPT Phan ng Lu
KIM TRA HC K I - NH. 2011- 2012Mn: Vt l. Lp 11.
Thi gian 45 pht( Khng k thi gian pht )
B
R
BA
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----------- HT ----------GHI CH: Hc sinh lm c hai phn ring ( II v III) s khng c chm im phn ny.
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A BM
q1 q0 q2
10F
0F
20F
p n PHAN NG LUI. PHN BT BUC
Cu 1:-Pht biu ng 2 nh lut Faraday..............................................................................................0,5-Ghi ng biu thc tng qut ........................................................................................................0,25-Gii thch ng cc i lng v n v ca cc i lng........................................0,25Cu 2:
Ht ti in trong cc mi trng:- Kim loi: electron t do ( electron ha tr)................................................0,25- Cht in phn: ion dng v ion m..........................................................0,25- Chn khng: electron pht x nhit ( electron a vo).............................................0,25- Cht kh: : electron, ion dng v ion m.............................................................................0,25Cu 3:- 20100 FFF
+ - - ...0,25
- Nr
qqkF 6
21
0110 10.16
.............................................0,25
- Nr
qqkF 62
2
0220 10.16 .......................................................................................0,25
- V: 2010 FF
nn NFFF 620100 10.32 .................................................................0,25
Cu 4: Gi M l mt im bt k trong khng gian- MMM EEE 21
.........................................................................0,25
-MM EE 10
cng phng ngc chiu ME2
............................................0,25
- Do q1.q2 MM r
q
r
q
22
2
12
1 v 1012 MM rr => cmrcmr MM 20,10 21 ............................0,25
Cu 5:- p dng nh l ng nng ta c:W = A.............................................................................0,25Suy ra: W = A ( v vn tc ban u bng 0)...........................................................................0,25-W qEd ............................................................................................................0,25
-W J1810.6,1 ...................................................................................................................0,25Cu 6:
- V R1//R2//R3 nn:321123
1111
RRRR .............................................................................0,5
- 7
4123R ......................................................................................................0,5
Cu 7:-R123 = R1 + R2 + R3 =18................................................................0,25
- p dng nh lut Ohm cho ton mch: ARr
I 3,0123
....................................0,25
- V R1 nt R2 nt R3 nn: I1 = I2 = I3 = I = 0,3A..........................................................0,25- U1 = R1I1 = 1,5V...............................................................................0,25Cu 8:- Vb 5,75 ..............................................................................................0,25
- 44rrb ........................................................................................0,25
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- p dng nh lut Ohm cho ton mch:Rr
Ib
b
.................................0,25
- AI 1 ............................................................................................................0,25II. PHN T CHN (Dnh cho hc sinh hc chng trnh chun).
Cu 9:p dng cng thc Faraday Itn
A
Fm
1 ....................................................0,25
=>
At
mFnI ..................................................................................................................................................0,25
Mt khc m=V=.S.d..................................................................................................0,25
At
SdFnI
=2,47A.................................................................................................................0,25
Cu 10: Do b qua s ta nhit ra mi trng xung quanh nn nhit lng cn cung cp cho nc sitrong cc trng hp l nh nhau: Q1 = Q2 = Q3 .................................................................................0,25
- Dng dy R1: 11
2
1 tR
UQ (1)
-Dng dy R2: 22
2
2 tR
UQ (2)
- T (1), (2) suy ra: 12 4RR .............................................................................................0,25
- Dng dy R1//R2: 3
21
21
2
3 t
RR
RR
UQ
(3).........................................................0,25
- T ( 1), ( 3) suy ra: t3 = 0,8t1 = 8 (pht)...............................................................0,25III. PHN T CHN (Dnh cho hc sinh hc chng trnh nng cao).Cu 9: S mch: C1// (C2 nt C3)......................................................................0,25
- FCC
CCCC
b5
32
321 .................................................................................................0,5
- CUCQ bb 50 .....................................................................................................0,25
Cu 10: t R3 = x>0
-
3
12123
x
xR
53
)1(24R AB
x
xIUAB ................................................................................................0,25
-53
2413213
xIUUU
AB
v R1 nt R3=> I3=53
24
x..............................................................................0,25
Cng sut tiu th trn R3 lxx
xRIP
30259
576.
23233
(*)
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v x khc O, nn t (*) ta suy ra30
259
576. 3
233
xx
RIP ...........................................0,25
p dng bt ng thc csi ta tm c x= 3
5.............................................................0,25
Ht
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S GDT Tha Thin Hu MA TRN THITrng THPT Phan ng Lu Mn Vt l 11
T Vt L - CN
Cu Ni dung kin thc S im Bit Hiu Vn dng1 nh Lut Faraday 1 x
2 Bn cht dng in trong ccmi trng
1 x
3 nh lut Coulomb 1 x
4 in trng 1 x
5 Cng ca lc in trng 1 x
6 nh lut Ohm cho onmch cha in tr thun
1 x
7 nh lut Ohm cho mch inkn
1 x
8 Mc ngun in thnh b 1 x
9 nh lut Faraday 1 xChun 10 nh Lut Jun - Lenz 1 x
11 Ghp t in 1 xNngcao 12 Cng sut dng in 1 x
Ph Vang, Ngy 14 thng 12 nm 2011