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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

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de kiem tra ly 11 hk1