Vdy chgn dap an C.
Trang 127rd
Khi d
o da
o don
g ta
i O
sdm ph
a ho
n ta
i M
la
Phi/ong trin
h da
o don
g cu
a pha
n tu
f va
t cha
t ta
i O la:
Uo(t) = asin27r
Vdy chqn dap an
C
Cdu 38:
Khi c
6 hie
n ttfcrn
g quan
g die
n xa
y r
a tron
g t
e ba
o quan
g dien
,
ph6t bie
u na
o sa
u da
y l
a sai
?
A Giu
f nguye n
cLforng
do chu
m sAng
kich thic
h v
a ki
m loa
i dun
g
lam catot, gia
m ta
n s
o cu
a an
h san
g kic
h thic
h th
i don
g nan
g ba
n da
u
CL TC
dai cu
a electro
n (electron ) quan
g die
n giam
B GiC
r nguye
n chu
m san
g kic
h thich , tha
y dd
i ki
m loa
i la
m cato
t
thi don
g nan
g ba
n da
u ciT
c da
i cu
a electro
n (electron ) quan
g die
n tha
y doi
C Giu
f nguye
n ta
n s
o cu
a an
h san
g kic
h thic
h v
a ki
m loa
i la
m
catot, tan
g cifcfn
g d
o chu
m san
g kic
h thic
h th
i don
g nan
g ba
n da
u c\Xc
dai cu
a electro
n (electron ) quan
g die
n tSng
D Giu
" nguye
n ctfcfn
g d
o chu
m san
g kic
h thic
h v
a ki
m loa
i dun
g
lam catot, gia
m hiidc
song cu
a an
h san
g kic
h thic
h th
i don
g nSn
g ba
n
dau
CLfc
dai cu
a electro
n (electron ) quan
g die
n tang
Giai
Theo din
h lua
t quan
g dien , kh
i c
6 hie
n tiigrn
g quan
g die
n xa
y r
a
trong t
e ba
o quan
g di?n , don
g nan
g ba
n da
u cii
c da
i cii
a ca
c quan
g
electron hoa
n toa
n khon
g ph
u thuo
c va
o ciicfn
g d
o an
h san
g kic
h thic
h
ma ch
i ph
u thuo
c va
o budf
c son
g v
a ta
n so
Vdy chgn dap an
C
Cdu 39:
Tai ha
i die
m A
va B trong mo
t mo
i tri/dn
g truye
n son
g c
6 ha
i
nguon son
g ke
t hop , da
o don
g cun
g phtron
g vdr
i phifcfn
g trin
h Ia
n lifc*
t
la U
A =
asincot v
a U
B =
asin((ot +
7i) Bie
t va
n to
e v
a bie
n d
o son
g d
o
m5i nguo
n ta
o r
a khon
g do
i tron
g qu
a trin
h son
g truyen Tron
g khoan
g
giuTa A
va B
CO gia
o tho
a son
g d
o ha
i nguo
n tre
n ga
y ra Pha
n tu
f va
t
chat ta
i trun
g die
m cu
a doa
n A
B da
o don
g vdf
i bie
n d
o bkng :
A - B 2a
C 0
D a
1 8 GiSi Ch
i tig
t th
i T
S D
H,
CD
M6n VSt!
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