Bùi Sỹ Khiêm THPT Tĩnh Gia 2- Tĩnh Gia –Thanh Hóa DĐ: 0972549023
SỞ GD&ĐT THANH HÓA ĐỀ THI CHỌN ĐỘI TUYỂN HỌC SINH GIỎI CẤP TRƯỜNG
 NĂM HỌC 2013 – 2014
Môn thi: Vật lý
Thời gian: 180 phút (Không kể thời gian giao đề)
Câu 1: (5 điểm)
 !"#$% &'()**+,  -.,/#, 01
2 3# 014 5678 ",,
)
(*#9:;8 ",,
)
 5678 ",
</,

(*#9=>)?:;!8 ", "@/ ,/%!AB
ACD.,/=DE63AFGH.I//6J?7K ", 3
26LMF/!8 ",,
)
#,

:4N ",H/ 012/6JE63AF
O,A'H1P:QRS1/%<TI/,AN:
1.UV,!8 ",15-67/1AS1!A>@/ #WN/H16J:
/?XYMZA>@/ I/[:
H?FTN/58 "6J K 
)
(), Y

(

,:

%18FS1d"&
*
^h*p mmHg
=
6&$ &(^
*
;>L1/Id
GA&^9#i,:
/? jJMH"1<F!M%18FS1d"$ &=
*
;?67L1/
WIdG&:
H? FL1/
)
I/IdGE$ 
)
(i)
*
;HYA. !M%18FS1d"&
)
^9)p mmHg
=
:
Câu 3:(5 điểm)
;,4 $>ik
( )
Q
1 (l %m X
#
m

R
L r
V
2
Q
R
M
i
Bùi Sỹ Khiêm THPT Tĩnh Gia 2- Tĩnh Gia –Thanh Hóa DĐ: 0972549023
/?>,$<B$2/
)
m
6&

m
:
H?>,$%%18I/,4HY%nI//6Y
)
X
#

X
0&
)
l
6&

l
:
oM@Ck

M 4TS1/$&

:
/?>,$<B$2/u
)
#u

#
)
#

6&l:
H?QY
) 
()#

(]#l (9,6&/81FAB&,H.
f,8Y%18q 74HE,,-Mvw
,-01'67H!F,-01I/D

78M)#90H!F
,-01I/D
)
:F! Cu
)
6&u

:
Câu 5:(2 điểm)
 ;,%@CC%/1kC $#, $!M/dL1 g6&N#,

*
x A cm rad
ϕ π
⇒ = − = − ⇒ =
x1dA/MZA>@/ k
%=)* ?x t
π
= +
,:
0,25
0,25
0,5
H?N/58 "6J@   K
)
 Y

Z<6J1d" A
K
)
 Y

)
) )
)
%
 i
x
c
A
π

0,5
?X3AFI/6JEN ",
)
&
) )
]
t
π
ϕ ω π π
= + = +
S1Ok
: _#9 _

t rad
π
α ω π π
= ∆ = = +
y1\ N  kx(_:zx
*

K6A/#
%1dA/x
*
(



A

x1dA/x()hz

r
7VL1G,#
*x⇒ >
{L1$ "6JH3!
)F ≥



)m x
ω
⇔ ≥
x cm
⇒ ≥
#XJH3!4 ((,
rZA>1d" I/,)%/1,H3!A/
z?X7
*
(
)
 )*
T
s
π
ω
= =
#
) )
+ )*  +k m rad s
ω
= =

 
= −
 
,67
*
t t≥
0,25
Câu 2
(3đ)
/?Wx&Y@$I/:UOFA:|A4!H/ 01/k
) * )
^h* ^9i ^= ?p p h mmHg
= − = − =
q
)
(^z^i(i**=}?qX
)
(9^x=,,
i
?:
|A4!%/1k

= ?q
kq
p p h mmHg= −


(z^i=}?qX

(x=_)*r?=,,

0,25
0,25
0,75
0,75
H? VH&A//Mk
i) ^i
^9) )#ii =~?
_)*
h
h
+
= +
−
TM=~?/$,(^]]#_,,
0,5
0,5
Câu 3
(5đ)
/?W$M/2/ $!MI/,4;#;Q67@ $0&
)
ϕ
#

ϕ
)
/
C
Z
R
ϕ

 
 
) 
) 
 
%
) )
 
R R
R L R L
C C
ϕ
ω ω
ω ω
= =
   
+ − + −
 ÷  ÷
   
 
) 
) 
) )
L L
C C
ω ω
ω ω
   
− = −
 ÷  ÷

+ − + =
 ÷

 

) 
) 
) 
)
*
) )
L
C
LC
LC
ω ω
ω ω
ω ω

+ =


⇒

= → =


0,5
0,5
0,5

U U
U U
→ + =
−
( )

   
 )  )
:
R R
U U U U U U→ = −
→
) 
 
) 
R
U U
U
U U
=
+
r-!k
 
) AB
U U U= +
) 
 
) 
 
% *#th

) )
€  € €
@ @
r€ r€
l l
l l
− −
= − = − =
xM@4I/$k
)  ) 
)
)   )  ) ) 
€ € € €
 :
r€ @ r€ = € € ? € € €l l
   
= − − =
 ÷  ÷
− − − +
   
x1dA/k
)
=lw€
)
w€

?(
)
l€
)

€

z€
)
€

=?
;/=)?6&=?/1 "•6&HY g/ k

)


=€

w€
)
?(€
)
€

=

w
)
?
}YS1Tku
)
wu

(

(=w)?
)
)#9:
n%k
)

u
)#9
u
=
=i?
K!%$1 Lku
)
wu
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