D+r
HgC
QriOC
GLA
HA NQr
TRTIONG
TIIPT
CHT|YEN
IGITN
oB
rrNtvr TRA KIEN TIITIC THI DAI rroc i.iAiw
aOLI
_
LAN 3
Ciu
l:
Cdu
niro du6i
dAy ld dirng khi
noi
uC
-Oi
li6n
h0
giira
n[ng
lugng
di6n trucrng W61 vd
nbng
lucrng tir
truong W1, trong mach

d0
W vd ciurg
pha
.
B.
Wa,,
Ws
bi€n thi€n diAu hda
theo,thbi
gian
vdi
ciing chu ki 2T, cirng
bi€n
d0 2W
vd
ngucrc
pha
TW
C.
Wot, W6
biOn thi€n diAu
hoa
theo
thoi
gian
v6i
cirng
chu ki
:,
cung

di6n
tir c6
buoc
s6ng 1.1
:300m.
NOu mic thOm
mQt tp diQn Cz n6i ti€p
tu.li6n
Cr thi mach
dao
dOng
LCrCz thu
c6ng hu6ng duo. c
m6t s6ng diQn
tu
c6 budc s6ng
l,
:240m.
Ndu
chi
dr)rng tu
diQn Cz thi rnach dao
ddng LC2
thu
cdng huong clugc
mQt s6ng diQn
tir c6
budc
song
ld:

khi bat
ra kh6i
cat6t.
Cho di6n tich
vd khdi luong
cira
dlectron
e
:
-1,6.i0-lec,
m:9,1.10-3lKg.
Cdng su6t
trung
binh
cira
6ng Cu-lit-gio ld:
A. 728W 8.730W
Cf,u
4: Hinh
bdn bi6u
diOn
sU
phg
thu6c
^
.A
vAn
tdc
dao
d6ng cfra m6t vAt

6
D.
x:4cos(lOnt
*
L\"
a'
J
2.078
10?E
c.732W
u{cmrtsJ
1
3S
D.734W
13
30
Ciu 5:
Dao
dOng ri6ng cira rnach dao
dQng
LC li
tucrng c6 tinh
chAt: cir
sau mOt khoing
thoi
gian
t
:
10-6s thi
ndng luqng diOn trucrng

ciu
6:
V4r
t6c
vd
gia t6c
cira
con
i6c 1o
xo
dao
clQng
di0u
hoii
tai
c6c thoi
di6m
tr
,
t2 Qo
gi6
tri
trrong
ung
ld
v1
:
0,l2rnls,
urJ
0,64^ls2,v2:0,16m/s,

theo
qui
ludt:
x: 5cos(5nt
-;
I
t"-1.
Trong
khodng
thoi
J
gian
t
:2,75T
(T.ld
chu
ki
dao
dqng)
cnat eicm
di
qua
vi
tri
c6n
bing
cua
n6:
A.
3

ffi
aoi,
rotitu
diQn
c6 iigtr
aung
c
thay
d6i
duqc.
ti,{5i.s6ng
diQ'tit
dou
tao
lu ltSng
mach
clao
aO"g
,roir"ir
aie*aOrg
c6m
ulB.
Xem
ring^c6c
s6ng
di6n
tir c6
bi6n
dQ
cam

Khi
diQn
dung
cua
tg
diQn
C2
:
8.10-6
F
thi suAt
diQn
dong
cAm
img
hiQu
dqng
clo song
diqn
ttr
tao
ra
ld:
A.
0.5Pv
.8.
tl'Y
,
c'.1',?
tY

bibien
oang iol
truy6n
cho no
mQt
v0n
tdc ban
,
^6
1
'
1 a o ,n- iA^
^^-
I*^ .lo^ ,
ddu
vo
mts
theo
phucrng
thing
dimg
l€n
phia
trdn.
Sau
khi
dugc truy6n
vAn
t6c
con

d6
luc
ddn
hOi
tac dgng
10n
qul cdu
c6
dO
lon
bing
dO lcrn
cua h,rc
ddn
h6i
ctrc
dai
lir :
A.
-s
5
7t
B s
10
7T
C s
15
?
a
J

hodn
todn
gi6ng
nhau
thi
cucrng
c16
dong
diQn
ch4y
trong
dAy
trung
hoa
lh:
A.
Bing.h6ng
B.
Kh6c khdng
C. Chi
bang
COirg
dmQt
sO
thOi
ei6m
D. Ciba
phucrng
6n
A, B,

xe
tr6n
c6c
lo
xo
giim
Xoc
To
:2s.
Xe biXoc
manh
nhAt
khi
vin
t6c ctra
n6
ld:
A. 5m/s
B.J,Smls
C.
10m/s
D'12,5m/S
Cf,u
12:
MQt
m4ch
dao
dQng
LC
li

dong
diqn
i chay
trong mach
vd cucrng
d0
dbng
diQn circ
dai
Io
ld:
t;
!J
B.
"-
c.
2
Cffu
13
: E4t
m6t hiqu
dign
th6 xoay
chiAu
u:200cos100zt
(V)
vio hai
dAu
ctra mQt
m4ch

=
F thi
dong
diQn
tirc
thdi
ch4y
trong
mach nhanh
pha
m6t
goc
ld
t
to
voi
hi€u
diQn
th6
tuc
3n
uvrrb
erYrr
6
thoi
giiLa hai
ddu
doan
mach.
D0

B.
14,268
pF
C'21,4021t"F
D'
3i,847pF
r,r: ,+A +Li
(?Q
C6u
t4:
M6t
ri6ng
co
kh6ng
d6ng
bQ
ba
pha mhc
vito
Tq.h
dien
3
pha, trong
d6
di6n
6p
pha co
gia
tri
hieti

lir:
" J
a.
t,gZt
W.
"t
3:7-4yY
-
C'
5,61kW
.
D'
7'48kW
-
^L.i+.o
hoi riqn rtA
Ciu
15:
Hai
ngu6n
phdt.song
k6t
hqp Sr,
Sz
t{n
mg
ctr:At
lOng
c6ch
nhau

Nhtu;?,c"r
rra*,ren
arr;;i*"g
try.c"cua
do?n
SrSz
mir
s6ng
tolg
h-on
t4196
luon
dao
d6ng
nguoc
pha
vcri
ffi,6ng
hnp
;ui
o
to"ra
tring
di6m
cua
srsz),
c6ch
o
m6t
kho6'g

dirrig
voi
tAn
s6
f
thay
doi
duoc
trong
khoin
gtu 45Hz
d6,n10Hz.
song
tao
thdnh
lan
trtryAn
tron
day
voi
van
to.
u
:
5m/s.
D6
di€m
M
tren
ddy

con
fi" fO
xo
gtm v4t
n{ng
co
kh6i
lugng
m
:
0,2
kg
vd lo
xo
co dQ
cung
k =
80
N/rn
dao
d6ng
cri€u
hoa
theo
phuong
.rim
ngang
.
Ldy
glcthoi

-)cm
6'
5tt
C.
x
:
2cos(20t.u
-)
srn
6'
Cf,u
18:
Dat
mQt
ngudn
'iin
xoay
chidu
co
hiOu
di€n
tilC
higu
dung
U
"
120V,
tdn
s6
f vdo

Biet
hieu
diQn
th6
tuc
thdi
giira hai
didm
A,
N
lQch
pha
mot
goc
lir so
voi hiQu
dien
th6
tirc
thoi
giira
irai
di€m
M,
B,
d6ng
thoi
cubng
d0
ddng

isow
cfiu
19:
Trung
di€m
o
cua
mQt
sqi
ddy
ddn
diQn
AB
(A,
e
co ainh)
chiOu
dai/
dat
trongmQt.tt
tnrcrng
d€u
sao
cho
c6c
ducrng
sirc
tir
trudng
vuong

truyen
s6ng
tr0n
day
d?,l'v:
imls.ChiOu
dai
cua
sqi
ddy
d6n
li:
A.
30cm
B.40cm
C' 50cm
D' 60cm
Cf,u
20:
Trong
thi
nghiQm
Y ung
uA
giu"
thoa
6nh
s6ng:
D =
^2\,r1ar

tim
ld
6,24mm.
Khoing
cdch
a
giira hai
khe
Y-dng
ld :
A.0,5mm
B.
lmm
C'
1,5mm
D'
2mm
Cf,u
2t:
Dat
mQt
hiQu
diqn
th6
xoay
chidu
u:
100J2
cbs100\t
(V) u:?,hui.d.uu

.^
r,

1
rr.^- r:A^ .,^^,,
^r-:A,,
^1.o.,
trnnc mqnl'
th6y
khi
Lt:
LH
vir
Lz
:
u"
H,
cuirng
d0 higu
dgng
cuir
dong
diQn xoay
chidu
chay
trong
mach
d€u
7t
7r

r,
,/L
1
/L
4
so
vo'i
Trens ill
'lrir?
ae tni S:t
10-'
i
0-'
A.40O
F
8.30O F
'
6tr
3n
lr
dong di0n trlc thoi chay trong
mach i
:
Iecos(cot
+
;
)
(A)
b
H6p

Ciu
22:
Ctrong
dQ
dong
diQn
tirc thdi
cua ddng
diQn xoay
chiOu
chay
qua
mQt
diqn trd
R tudn
theo
qui
ludt
i
:
6.28sin
I 00ft1
(A). Di6n lugng
chay
qua
diOn
trcr
niry
trong
thoi

nim tr6n
cing
m6t
phuong truydn song
di
qua
S c6ch nhau
6qm
lu6n
dao d6ng nguoc
pha
nhau thi vQn tdc
truyAn s6ng ld:
A.20cm/s
B.23cm/s
C.24cmls D.25cmls
Cffu
24: Trong thi nghiOm
Y-dng
vO
giao thoa anh
s6\g: a:
0,5mm, D
:
1,5m. Hai khe duoc ciri6u
bing
clrilrrr
buc
xa
g6rn

nhau
do nim ngodi
cirng.
Budc
s6ng
7'2
lir:
A.0,45pm
.
B. 0,55prm
C. 0,65prm
D. 0,75pm
Ciu
25:
Ddt ldn luqt mQt ngu6n dipn
mQt chi6u c6
hiQu diQn
th6
Ur = 110V vd ngu6n di6n
xoay chi€u
c6
hi€r-r
di€n UrC
nieu dung
U2I
U,
,
t6n sd
f
:

H D.R=5oo,L
:''2,
7T 7t
7t
7T
Ciu
26:
Eoan m4ch AB
g6m
m6t cuQn ddy li tudng c6
dO
tu cirm
Ls mic
nOi tiep voi
mdt hdp den
X. DAt
vdro hai dAu
A,B
cira
doan m4ch ndy mQt hiqu dign
th6 xoay
chi6u
u
= Uscos(ot -
)
(V)
thi cuo'ng
d6
7r
6

bi
giAm
D. Song
Am vd 6nh s6ng
dAu
bi
phAn
xa tai
mflt ngdn
c6ch
giira
kh6ng lchi
vd nu6c
Cfiu
28:
Trong thi
nghiOm Y-dng vi:
giao
thoa 6nh
s6ng vdi
6nh
s6ng
tring
c6 budc
s6ng tir
0,38pm c16n
0,76pm: a: 0,8mm,
D
:2m.
Tai vitri vdn

ra hai
dao dQng
di6u
hoi cirng
phtrong
thing d.ntg, cung tdn sO
g6c
co
:
30 r rad,ls
vd
nguoc pha
nhau.
Tr6n mdt chdt
l6ng
xiy
ra
sr-r
giao
thoa
cua
hai
song. Bi6t t6c dQ
truy6n
s6ng
tr€n
mat ch6t
long v
:
90cm/s. Sd ducrng cuc

hOi
tu tai
hai ti€u
diOm
nim tr6n truc
chinh cira
th6u
l<inlr. Bi0t
chi6t
suAt cira thAu kinh
dOi
voi
6nh
sdng tim vd do
tuong
rmg:
n1
:7,64,
il6: 1,6, chi€t suAt
"tu
khdng khi bing
1,
ti€u cu cua thAu
kinh
aOi
vOi
6nh s6ng tim ft
:28,125cm.
Ti6r,r
cu cua

cho
tp
dien
tich
dien
rdi
cho
n6
phong
diQn
id:
A.
Dao
d.ng
diqn
tir
cuong
bric
B.
Dao
dOng
diqn
tir
tit
dAn
D.
Dao
dQng
diqn
tir

ph6t
ra'tit
A.
Quang
pno
iien
tu"
B'
Quang
ph6
v4ch
phdt xa
C.
Quang
ph6
v4ch
hdp
thq
D1
a;""g
Pl:
ll*
*"
u-lQtlut^e
phO
v4ch
hAp
thp
Cffu
33:

v6i
mQt
ampe
r<c
tni
th6v
no
chi
1A,
dding
thdi
dong
diQn
tirc
thdi
ch4y
qua
ampe
k6
ch6m
pha
mQt
e6"
2
so
v6i
hiqu
dign
the
tirc

ch4m
pha
mQt
goc
I
,ov'i
hiQu
diqn
thd
tirc
thoi
giira hai
dau
doa'mach'
4
Bi6t
rang
ampe
kri
vd
vdn
te
ACu
li tucrng.
HiQu
diqn
thi
hleu
dung
cta

dO
quay
cira
r6to
n:
720
vong/phfit.
56
cflp
cuc
cta
r6to
lir:
L.4
B.
5
c'
6
D'7
cffu
35:
chon
cau
dung:
dong
diQn
chay
trong
m4ch
dao

cliuacSc
ion
duong
C.
Dong
chuySn
ddi
c6
hu6ng
cita
c6c
ion
Am
D.
SU
UIen
tniOn
cua
diQn
trucrng
trong
t.u
diQn
theo
thoi
gian
Cf,u
36:Tinh
ch6t
ndi

t6c
dqng
nhiQt
r6t
mAnh
D.
Cfr'g
tu6n
theo
dinh
luQt:
truyAn
thdng,
phin xa,
khitc
x4, nhi6u
xa
vd:
giao
thoa
nhu
5nh
s6ng
thOng
tlrtrcnrg
cffu
37:
M6t
con
lac

duoc
4
dao
dQng'
chiAu
cldi
'/
ctra
con
lic
li:
A.24cm
B.36cm
C'
48cm
D' 60cm
ciu
38:
D4t mOt
ngudn
;b;
*;"y
chieu
c6
hiQu
diQn
th6
hiQu
dung
kh6ng

Khi
tu
diQn
co
diQn
dung
Cr
:
';F
thi
cucrng
dO hiqu
dgng
cua
dong
diQn
xoay
chi€u
chay
trong
3.10-'
m4ch
c6
gi6
tr!
cuc
dai.
Khi
tu
diqn

c.50f)
Trarrs,
511
-MadAthi
5-18
Ciu
39:
C5o'
cAu
dring:
sung
ngin
trong
v6 tuy€n
diQn
co
th€
truy€n
tli
rat
xa
tren
trdi
d6t
la
do:
,d. Phdn
xa
li6n
ti€p

B,
C ddu
sai
CAu
40:
Chon
cdu sai:
A.Tia
tii ngoai.kich
thich
sp
ph6t
qua+g
cua
nhi6uchAt
B.
Tinh
chAt
n6i
bat
vd
quan trgng
nhAt cuatia
X
ld
kha ndng
ddm
xuyen
,
C.

vsi
c6c tia.co
budc
s6ng
ttgan hon
200nm
e;;;;,
rrabi.""
iac
don
dao
dQng-diAu
hda
quanh
vi
tri
cdn bing
cria
no.
Bi6t
ring
cir
sau
nhirng
khoing
,rriigl""
ua.;6,t;r
thi
dQng
n^dng

tAi
diQn
nang
di
xa
phii
dirng
m6y
bi€n
dp tang thC
la d0:
A.
Gidr-p
hao
phi
dibn nanE
tr6n
clucrng
aay
tai
Aien
n. tang c6ng su6t
ctra nguiin
diQn
C.GiAmc6ngsu6tonoiti6uthudi0nD.Tdngti€tdiQncriaddytAidiqn
Cf;u
43: Chon
cAu
dirng:
trong

C. Ldm
tdng ndng
lucr-ng
cira s6ng
mang
D. Ca ba
cdu
A, B, C
dOu sai
Ciu
44:
Chon
cdu
sai:
A. Anh
sdng don
sic
ln 6nh s6ng
c6.m6!
mdu
nnat
ei*r
vd
kh6ng bi t6n sic
khi di
qua lang kinh
B. Chiet sLrAt
cria
moi chAt trong
su6t

liOn lqc ttr
tim
dOn do
CAu
45: Ctrong
d0
Am tai di€m
A c6ch
trgudn dm
im bang 10-uWlm'. BiCt cudng
d0
Am
chuAn
Io
:
l0-r2
Wl m2. Xem rdng
ngudn
6m
ld
ding
hucrng,
ndng luong cira
s6ng
Am trii ra
tr€n
cltc mdt
cAr-r ngiry
cirng
mo

gOm
300
vong. Hai
dAu cira
^
'1 '
A
+
nic
v6i hai
dAu
ctra
m4ch
diQn
g6m
R,
L, C
m6c
n6i ti6p,
trong
do R:40f);
cuOn
d6y
li
cuor-l
thrr cap Ouoc
n
0^6 10'
tLropg
co

dQng
LC
li
tucrng c6
L:2.10-6H,
C:
8.10-tf'vd
cubng
dp
cgc dai
cira dong
diQn
chay
trong
mach Io
:
0,5A.
LAy
gdc
thdi
gian
t: 0
ld lirc.ndng lugng diQn trtrcmg
bing
ndng
ltrcrng
tir
tr.uorlg,
d€1tich
cua

q
:
2.10-icos(2,5.106t
-
!
'
n
4'"
a.Ztt
C.g
:
2.10-'cos(2,5.106t
*
lJ
C D.q:
2.10-7cos(2.5.106t -
iF
JJ
Cffu
48: MQt
con t6cCcrn dao
dQng
di6u
hoa
quanh vi trf
cdn bing cua
n6 v6i
li dO cong
s,
bi€n d6 cong ,So,

B.
s,
*J!!-rr-
Sn,
c.i
.s,
+u,
=So,
y.Z;sr+
vr:
^Snt
4nt
"
T!
u'
4nt Tt
u
Cffu
49: MQt
ch6t di€m dao dQng di6u
hda.theo truc Ox
nim ngang
tuAn
theo
qui
luit:
x
:
4cos(5n
t

Ciu
50:
Eflt rnQt hiOu
diQn thd
xoay
chi€u
u:200JI
cos100Tut (V)
vdo
hai
clAu
mach diQn
gOrn
c6
R, C
10_3
rnic ndi
ti6p, trong
d6 R:50^6f),
C:
j
E. Khoang thbi gian
ngfn
nhAt
tinh trlrthcyi
di6m t:0,
Jn
dong
di€n
tric

A
C C.
1
C A
A
D
3 C D
A
A
4
A C
A
C
f
C A
C
C
6 A A
A
A
7
A C
C
B
8 C
C
D D
9 C A
D
B

B
C
C
A
2t
A C A
C
22
C
C
B
A
23
D
B C
C
24
A
A A
A
J<
C
C
A
C
26
A
C C
A
27

B
35
D A
D
D
36
B C
C
A
37
D A
A
C
38
B
D
B
D
39 D
B
A
A
40
C
C
D
C
4l
A
B

48
A
D
A
D
49
B
C
C
A
50
C
D
C
D