Song diQn tir mang ndng lucrng B.[r]
(1)0I phaong dn trd loi hqp
g
nhdtCiu
1: Mach dao ddng c6 C = 6nF,L
=
6p
H Do m4ch c6 R = 0,5 C), nen dao d6ng mach trit ddn Ddtri
dao dOng vdi hiQu diOn thd cuc dai gifra haibin
ru diOnli
Uo=
10Vthi
phaild
sung nang luong cho mach m6t cdng sudtli
A
P:
15 mWB.P=20mW.
CP:25
mW
D 30 mWA.L:2mm
BL:3
mm CL:4
mm DL:5
mrn Cfra?z Song diQntt
c6 budc s6ng 12 MHz rhu6c loai s6ng nbo du6i ddy ?A s6ng cuc
ngln
B s6ngngin
c
s6ngtru.rg
- D s6ng ddi Cf;u3:
Phdt bidu nbo sau ddy sai n6i vd s6ng diQnrt
?A
Song diQn tir mang ndnglucrng
B S6ng di0n tX l*r6ng truydn duo c ch6n kh6ngc
s6ng diQntt
li
s6ngngang
D s6ng diQntt
truydrl dugc chan khongCfiu
4:
Trongthf
nghiQm giao thoa 6nh s6ngv6i
khe Young, chi6u d6ngthoi
hai bric ua Ao'n s6c c6 bu6c 96ng l'1 = 0,48pmvi
)u2 = 0,64pmNguli
ta th6y vdn s6ngbfc
4 criabfc
ia
i,.1 trungvdi
v6n s6ng bSc k cria l.z Giri tri cria kli:
A.2
B"3
c.4
D" 5Ciu
5:
Quang ph6 li€n tgcA, phu thuQc
vio
nhiet dO cria ngudn phdtmi
th6ne phq thuQc vdo bAn chdtcta
ngu6n ph6t B php thugcvio
bAn chAtvi
nhigt dQ cta nguAn ph6tC kh6ng phg thuQc
vio bin
ehdtvi
nhigt d0 cria ngu6n phritD phy
tlu0c
vnobin
chdt cria ngudn phrit me kh6ng ptrlr ttruQcvio
nhigt dQ cria ngu6n ph6tCffu
6:
Trongthi
nghiQmYoung
vO giao thoa 6nh s6ng, khe hpp S ph6tra
ddngthoi
ba b{rc xa don s$c c6busc
s6ngli
?v1: 0,421tm,1"2:0,56pm
vi
1.3:
0,63pm Tr6nmin,
trong
khoangdta
hai v6n sdngt.^ ,.K ,t
li6n ti6p c6
miu
gi6ngmiu
vAn trung tAmthi
s6 vAn sdng quan s6t duoc (hai v6nrei{t*ng
nhau dug-dnh le mQt vdn) ldh.20
B
21
c
26
D 27Ciu
7: Tia Ronghen cdA
cing bin
ch6tv6i
s6ng v6tuydn
B cirngbin
ch6tv6i
s6ng 6naC diQn tich
6m
Dbu6i
s6ngl&
hon buEc sr5ng tia h6ng ngoai. CAu8:
Trong ch6n kh6ng, cScbuc x4 dugc sap x6p theo thri tr,r bu6c sdng gi6m dAnh-A 6nh s6ng tirn, tia hOng ngo4i, tia tu ngo3i, tia Ron-ghen B tia Ron-ghen, tia tri ngop!, rinh s6ng tim, tia h6ng ngopi
C tia hdng ngo4i, rinh sSng tim, tia tir ngopi, tia Ron-ghen D tia h6ng ngoai, 6nh s6ng tim, tia Rcrn-ghen, tia tfr ngoai
Ciu
9: Trongthi
nghiQm Young vd giao thoa 6nh s6ng, khoAng c6ch gifrahai
khe a= lmm,
tt
2 khe ddnmhn D" =2m Ngudn S c6ch hai khe
lm
ph6t brlc xac6
.L = 0,6pm,
Di chuydn S m6t doanL
theo phucrngSrE dd vAn sdng trung mm di chuydn ddn trDng vdi vAn sr{ng
thrl5
Gi6tri
criaL
ld
-
-
ETRUCNG
DAr riQC
KX{OAErqc TUNHrEN
rRuo
N c_r:%.:-:YEr{
K rrrN
Mdi cdu cd 04 phuong dn
tni tdi,Thi
sinh chon m6tpii
rHr rr{r}DAr Hoc
LAN
rr
NAM
HCIc 201r - z&rzMON
THr:
vAr
lf
Thoi gian ldm
bdi:
90 phrttMa
d6:777CAu
10:Jlolg
giao thoa 6nh sring cria lu6ng ldng kfnh, c6c l6ngkfnh
g6cchitit
quang ld 4.10-3 rad, chititsuAt n
=
1,5.Ngudn dcrn s6c.c6l.=
0,6pm cdch lud'ng l6ng kinh-Ot
Coai
d:50
cm, mdn c6ch lu&ng ldng kinhL:
1,5 mKhoing
v6ni
c6 gi6tr!
li
A
i:0,2
mm
B i = 0,3mm
C i-
0,4mm
D
i = 0,6 mm Cf;u 11: Quqng ph6 criam{t trdi
quan s6t du<rc trdnm{t
d6th:
A Quang ph6
vph
phddxa
B euang ph6 li€n tuc9.^QT:gihd
vpch h6pths
Dquan!
pfrO tien tuc xen k€vdi
quang ph6 v4ch Cf,u 12: Trong thf nghiQm Young vA giao thoa 5nh sdng,khoing
c6chgita
hai khe a:
1 mm, tu hai khe Otinldn
D:
2
rrt, ngudn s6ng gdm bftc xa don sfc c6 1,1 = 0,5 pmvi
7v2:
A,6 pm Khoing
ca"Lnho,hatgifru
hai vdn silng
ctng miu
tr€n mdn ld:A
1,2 mmB.3mm
(2)Trw{t-ns THPT chuv€n KHTN"
di
thi tht? Dai ttoc IAnII
ndm hoc20tI
-2012
Trcne4L
Cfu
13: Conllc
idxo
dao dQng di€u hda theo phuongthing
dtmgvdi
chuki
T
:
0,4 s, bi€n ddA
:
8 cm Cho g:
l0
m/s2 vd n2:
10Thdi
gianngin
ntr6t a6vit
ditir
vi trf
cdnbing
d6nvi trf
ldxo
c6 chiAu dditu
nhi6nli.
A
1/10 sB
1/15 s Cl/20
sC0u
14: Ccn l6clb
xo
dao d6ng diduhoi
vdi
biOn CdA
=
2
cm, chuki
T
=
1,?s, pha ban ddLrld
2n /3" Qu6ng duongcon
l5cdi
duoc 4s ddu tiOn lb4.25
cm
8.26
cm
C.27
cm
D.28
cmCfiu
15: Trong mQt dao dQng diAuhoi,
vdntdc
criavit
bing
mQt nria v$n ti5c cgc d4i cria n6thi
ti
s6 gifra th6 n6ng vd d6ng nEngli:
'A.2
8.3
c
t/2
D
l/3
CAu L6: Con i6c lb xo c6 kh6i luong m
=
100 g, dao dQng diduhoi
vd
cd n5ng E=
32mJ T4i thdi didm ban ddu vAt c6 vfln tOc v=
40.6
cm/s vd gia toc u = 8*/rt
Pha ban ddu cria dao d6ngli
A.-lt/6
B tr /6 C-2n
/3
D.-n/3
Ciu
17: M$Jv{t
dang dao dQng co hgc,khi
xhy rahipn tugng cdng hudrng,vft
se ti6p tr;c dao dQng:A
Vdi
tAn sti nhd hcntin
s6riOng
B Ift6n.g chlu t6c dr,rng cria ngopi lgcC
Vdi
t6n sdbing
t6n stiri6ng
DV6i
tdn st5 lorn hsn t6n sli ri€ngCAu
18:
Conlic
ld xo dao dQng diAu hda theo phucrngthing
drmgv6i
tAn s6f
:2,5
F{2,qui
trinh daodQng thi
tf
siigita
lgcdin
hdi cpc d4ivi
cpc ti6u H Cho n2:
10 Gia t6c cgc dpi cria dao dQngh:
A
3m/s2
8.4
rn1s2
C.5
rdsz"
D.6
n/s2Ciu
19: Chon c6u sai c6c cAu sau n6i vd n6ng iugng dao d6.ng diduhol
A
Khi
d6ng ndng tiingthi
thd n[nggiim
BKhi
v{t
& vi trf cdnbing thi
d6ng ndng cira vAt lon nhdt C Khi vQtvi
trf biOn thi thd n[ng 16nnhdt
DKhi
vAt chuydn d6ng theo chidu duongthi
thd nd.ng tdng Cffu 2S: MQt oonlic
ldxo
c6kt6i
luqngvft
nh6 ln 50 g Conlic
dao dQng diAu hda theo mQt tryc c6 dinh nem ngangv6i
phucrngtrinh
x
= AcoscDt Cri sau nhfingkhoing
thdi
gian 0,05 sthi
dQng nEngvi
th6 ndng eriavft
laibing
nhau L6y n2=lA
Lb xo cria l&c c6 d$ e{rngb[ng
A 50 N/m
B
100 N/m C.25 N/mD.200I.[/m.
Cdu
21:
Con l6c ld xo c6 m:
1 kg, dao dQng diAuhoi
vi
c6 co nSng E=
125 rnJ Tpi thdi di6m ban ddu v6tc6 vAn tdc v =
25
amisva gia tOc a = -6,25.5
nVrt Th6n[ng
con !8et4ithdl
di6m t:4,25T
iit
A.3i,25
m.n B.62,5 mJ{,&ur22z MQt
v{t
tham
gia
ddngthdi hai
dao dOng diduxz=
2cos(IAnt
-n /2)
cm VQn tdc cria vatt
=
8s lhA 20 cm/s
B
40J2
cmlsC 20r
cmlsD.40r
cmlsD
l/30
sC6u
23:
MQt l8c ld xo dao d6ng-di€u hda theo phuong.ngangv6i
tAn sii g5c 10 radlsBitit ring
ddng n6ngvi
thrS n[ngbing
nhauthi
v6n t6o er]a vdt e6 dO l6nbing
0,5 rnls Bi€n*6
C"o dgng ofialio
li
B
5J2
cmD
10JI
cmC.93,75
mJ
D
25 mJhba
c6
phuotrgtrinh
: \=
Zcosl}nt
cm
vhA.5cm
C.5
cm::$,3i;fl'."ft'J'ffi*
flftilT#lH:'uut
'uil
si€u 6m c6 thc truydn dusc ch6n kh6ng C Si0u 6m c6 t,An s6 l6n hon2AkHz
D Si€u 6m c6 thO truy€n dugc chdtrin.
C6u
25:
T4i mQt di6m crieh ngudn Am 10 mthi
s6 mfrcculng
d0 6m ln 70 dB H6i t+i mQt di€m c6ch ngudn 0m 1m thi c6 mricculng
d0 Amli
bao nhi6u ?A
50 dB B 60 dBc
80 dts D 90 dBCdu
26:
Tr6n mQt sgi ddy dnn hdi dei 1,2 m haidiu
c6 dlnh dang c6 s6ng dirng, ngodi hai dAu dAy cO dinh cdnc6
hai di6m khdc tr6n ddy kh6ng dao
dQng vAthdi
giangira
nai l6n ti6niiep
sgi d6y dudithing
ln 0,05 s VQn tde truyAn s6ng.tr0n dAy ln :A m/s
B
i2
m/sC.4
m/s D m/sC;dw27t M$t s6ng co lan truyAn mQt mdi truong
v6i
tdc dQ l20cm/s, tAn sd cria s5ng thay d6itir
l0FIz d(in 15H2 Hai diiSm cSch l2,5cm lu6n dao dQng ru6ng pha Budc s6ng cira s6ng co AOta:-A.6,25
cm
B
12,5cm
Ccm
D
l0
cmCf;u 2E: Khi c6 s6ng
dtng
tr6n mOt soi day dbn hdi AB hai ddu cd dinh thi th6y rren ddy c67
nfit Bidr tdn so s6ng lh 42H2"Vdi
day AB vh vAn tdc truydn s6ng nhu tr0n, mudn trdn ddy c6 nritthi
tAn sd sSngphii
lbA,28HZ
B.30Hz
C.63Hz
-+;.-lli
D
58Hzg{'7ir,;;,"";,-}))og
Stu':'*i+-!"&
(3)Trrdnt
\HFT chuv\rt KHTN, di thi thth Dai hoclin II
ndm hoc20It
-2012
-
Trafte3l4 Cfrw29z Ntiu 6nh sSng di tir m6i trud'ng su6t'ndLy sang m6i trudng su6t khdc
thi
sd c6 sg thay ddi c'la:A
Vpn t6c vdtin
sdC Bu6c s6ng
vi
v6n trScB.HQ sd c6ng'sudt cria doan mach giAm D.HiOu di6n thdhi€u dung trCn cuOn
cim
giAmC6u
30:
'frong doan m4ch RLC rt6i tidp dangx|y
ra cdng huirng Tdng ,Cdn tdn sd cbng dienvI
gifi
ngu5rgncilc th6ng sd kl'r6c cita m4ch, kdt luAn nho sau dAy dring A.Cudng d0 hiqu dung cfia dbng didn tdng
C.HiQu diQn thdhigu dung tr0n tg diOn tdng
Cf;u
35:
Dat diQn 6p u:
Ucos a;t
vdo hai dAu doan3LCa2
: i
vi
r =
ZJicoL
Chgn t<6t tupn dirng: A u nhanh phar
13 sov6i
iC
i
nlranh pha n /6 sovdi
uCSu
36:
Mach xoay chidu ndi tidp gdrn curdn dAy c6I-
=B Kir6ng c6 gi thay d6i D TAn s6 vd budc s6ng
B u nhanh pha n 16 so
vdi
i Di
nhanh pha n/3
so vdi u1
i
FI,r
=
50f)
vd tr-r di€n CKhi
hi6u di€n thd haiE
CAu
31:
M4ch RLCn6i
ti6p g,5mR
biiln OOi,.cugn dAythuin cim
c6
L
= ?H,
tu
dien c6C
:
191p
p517t 7f
vdo hai dAu do4n mQt hiQu diQn th6 (100V - 50FIz)
Khi
mach c6 cdng su6t 40 W thi R c6 gi6tr!
ldA
50 O hopc 200O
B
50 Q hoaq 100A
C.100O ho[c
200Q
D75fl
hopc 150 QCAu32:
Trong doan.m4ch cliQn xoay chi6u gdm diQn tro thuAn, cu6ncim
thuAn vd tu diQn-ac
n6i titlp thiA
di€n 6p giftahai dAu diQn ngugc phav6i
diQn 6p gi&a hai dAu dopn m4ch B dien 6p giirahai dAu cuQn cAm cing'phavdi
diQn 6p gifta hai-dAutp
di6n C diQn 5p gitra haidiu
tp diQn tr6 plra sov6i
diQn 6p gitrahaidiu
dopn m4ch D diQnip
gifrt"hai dAu cuQn c6m tr6'pha sovdi
diQn 6pgifa
hai cIAu do4n'mpchCiu
33:
Cho m4ch di6n xoay chiAu RLC nOi titip c6 tAn s6f
thayd6i
duqcKhi
f
:
f1:25
Hzhayf
: fz:
i00 tlzthi
odng suAi c&a rnacli ldr rrtru rrhauH,ii v6i
gi6tri
ndo ciihtin
s6thi
cdng s,rdt cria mach ci,ie d4i ?A.'75 Hz B zs
Ji
uz
c
!o
ru
D soJt
HzCAu
34:
DAt hieu diQnthti
u
=
Uosin2nft
(V) r,ib
hai dAu machn5i ti6p
g6m diQn troR
:
i00 O,
cuQnddy thuAn cdm c6 L
=
iH
vd tu di€nc
:
10-qF ci6 tri
c0a tAn sdf
de higu di€n th6 tr€n ru dat cqc dai ld71nTi
A.25
HzB.zs
Jt
Hz C 50Hz
D
s}J,
Hzmach gdm cudn ddy
(L, r)
"Oi tiOp tir diQn C thda mdn
ddu doan mach
lb u
=
!20JicosL}}nt
(V) thi
ddng diOn machid
i
=
2,4cosQ}az-t
+
1rl4)
(A) Dung khrirng cria tu diOn c6 gir{tri
idA
50f)
B
100 CIc
150f}
D 200o
c
300 f2D.450
f'
F
{du37:
MachLCly tu&nggdmcu6ndayLvhtudiOn
C=O,AZ ptrKhidaoddngtrongmachdndinh,hieu
,ii€n thd cuc daigifa
hai b6n tu diQnli
Uo =^I
V
vh cudrng dO ddng di€n cuc dai mach lh Io = 200 mA Hidu didn thd gifra haibin
tu di€n tai thbi didm cudng dQ dbng di€n machc6
gi6 rnbang 10bmA
lbA.0,3
V8.0,5 V
C0,3 6V
D.0,5""6''l
CAu
38:
Khung chgn s6ng g6m cu6ncitmL
vd tu Ct,Cz N6u ehi dilngL
vd
C1thi
thu duoc s6ng c6 2"1:
100 rn Ntlu chi dirng
L
vi
Czthi
thu duoc s6ngXz:
7 mKhi
dirngL vd
hai tU Cr , C2 song song thikhung thu duoc s6ng c6 bu6c ld
A.25
m C.125 mC
150 mD
175 mCSu
39:
Trong so dO cira m6t mriy ph6t s6ng vd tuy6n di€n, kh6ng c6 mach (tAng)A khuiich
d4i
B, ph6t dao d6ng caotAn
C bi6ndi€u
D rrich s6ng CAu40:
Mach xoay chiOu ndi ti6p gdm cuQn ddy thuAncim
L,
di6ntrd
R:
150Jt f)
vd tu diQn C D6t vdo haidAu doan mach hipu diQruth€u=L|ocosznft(V)
voi f
thay d6i duocKhi
f
:
fr:25Hzhay
f
:fz:
l00Hz
tlri cudng d6 ddng di€n mach c6 giStri hi€u dung nhu nltrmg l€ch pha 2nl3
Cimldtdngoha
euQn ddy g't;
;:
f1 ld:A.50 ()
B
150f)
@
(4)4
cdu
41: Trong dong co kh6ng ddng b6 ba pha, chgn nhan dinh dring4
Khi
hoar ddng r.hi 16ro IuOn quay ddu B R6to cfia dong"g.h.ong
odn!
u-o quay vdi tdc dQ g6c cfia tir tnrirng quay C BQ phQn rao tir trubng quay ld stito.Q,
Tt
trudrng rrong dQng co ru6n rhal/ ddici
vd hu6n-rg vhrri
sdcfru
42: Machutul *?:t
chicu noi-riiip gom,u6n
a"ay9,
.),
mic.nt5i tii5p v'di tu di6nc
Bi€t
hiQu diQn th6 gifra hai dAu cu6n ddy lQch phan/
r"
u3i rriereier
,it6git"'rt"r
eairo"+ri-u"n
chgn ph-ucmg6n dring:
A
f
=z{zc-r'):,
",^ -I ,f
=?"ri-i;:'
:C.?:zc(zc-zr).:
'
.^''p:i:'irZr_ra.
C6u 43: Mach xoay chidu noi tiiip gom doari mach
AM
1g6m cud" dayt,19mfc
n6i ti€pv6i
aoanMa
t"e6-a t ^'r -
K nOr trep
c)- Kni
uav vu6ng phav6i
uys thi he thftc ndo sau d6y ld dringA
L
: C.r.R
BR:
L.C.r
Cr:L.C.R
D C
:
L.r.R!6u
la'-vlach
xoay chidu noi tidp_ c6 tdn sdf
= 50 H.z sdm cu6n day rhudn €6m L, diQntr&
R =i00
o
vi
tu
dien
c
Thay ddidiendung
1a
titiy
dien dung cfia"tr; tf,ng l6ni
ra"
irri
"o"g
sudt cria machk#;Hi
nhung cudng d0 dbng diOn rhiw6ng
pha vdi ntrau Cia tri-cria\n
A.50
O
B
100o
c.200
o
D3000
CAu 45: Ivtpch
nrc
n6i tii5p gom cudn ddy thuAn cdin c6L
=
?n,
,o dipn c6 C=
l0-+
F
vi
bitin rr& R."Edt
vio
hai dAu doan hiQu dien thd xoay chiAu(100v
- sqFlz)"dth:yaoi
n
d6 m4chro
.J.p
: Ji
tz.Giritri
cria K Knl qo laA
50f,
B
100o
c
150f)
D 20A
A
Ciu-46:
Tren dfYclng
hai ddu gifl ch6t dang c6 s6ng dung Kdtlu{n
ndo sau day 11 dringkhi
n6i vd pha cria dao d6ng c6c didm rrOn dAyA'
C6c didm tr€n day ludn dao ddngc[ng
pha
ts!_69 didm tr€n day luon dao d6ng kh6c pha
A tyt {P
u'
uac drcnx ffen cDng mOt bung dao ddng cfingpha
D Hai bung kd rrtrau luon daodon!ruonfprra
Cfrw 47: Phdt bi6u ndo sau Aay-fa dring ?A Ce 6nh sing
vi
s6ng 6m kh6ng k*ri dAuIi
s6ng ngang-B Trong khdng s6ng Sm ld s6ng doc, rlnh sringIi
s6nfngang C Ce'inh sSng vd "5ng Am rrong kirdng ichi dAu lA s6ng d-Ac
-Dca
6nh sringvi
song sic* am dAu truyen duqcchin
kh6ngC6u 48: Trong thi nghiQm giao thoa tr€n mpt nudc, hai ngudn
#i
rrqpA
vi
ts; dao d6ng ctrng phavdi
tAn s6f =Zawz;
Arl
=
8cmBiiit
t6o dQ truydn s6ng tr6nmft
nuJcIi
3-09md Mqt dudng h-dn e6 r6rn t4i rrung ditimo
criaAB,
nirn
trong rn6t phSng chftacilcian
giao thoa, b6nkfnh
3,2r'*
sO aicm dao d6ng cgc dai tr6n duong trdnli
A
16
B
18
c
19D.20.
cau
49: Mqt day dnn hdiAB
dni 80 sm c6_dAun
ci5 dinh, dAuA
mie vio
rnQt nh6nh pm rhoa dang dao dQngv6i f = 50 Hz
Khi
dm thoa rung, tr6n ddy c6 s6ng drmgvdi
4 bgng songvpn
i6c't*yen
s6ng tr6n d6y ld:A
v:10
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u, = asinctt
ld
or=
acosot s6ng khong suy gi6m DidmM
tr6n trung truc cfia -{,sr, gdn nh6t, cd dao dongcDng pha vdi dao d6ng ph6r & ngudn-S
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E
331./8c.381"/8
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