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)  !"#$% &'()**+,  -.,/#, 01 2 3# 014 5678 ",, ) (*#9:;8 ",, )  5678 ", </,  (*#9=>)?:;!8 ", "@/ ,/%!AB ACD.,/=DE63AFGH.I//6J?7K ", 3 26LMF/!8 ",, ) #,  :4N ",H/ 012/6JE63AF O,A'H1P:QRS1/%<TI/,AN: 1.UV,!8 ",15-67/1AS1!A>@/ #WN/H16J: /?XYMZA>@/ I/[: H?FTN/58 "6J K  ) (), Y  (  ,: ?FS1\ N,&6J  KN ", ) ( ]* s π  YN ",  ( ^ _ s π : @?F6JI/6JE (),: 2.;`5/8 ",H3HA/Y1aO4  4 Y):R8 ",,  "H3!R 8 ",, ) bY1>!E4 &bXYMZA>@/ I/8 ",, ) %/1 8 ",,  !R:N/6c8de: Câu 2: (3 điểm) Id>AC#, 01F @f&,AV " !M%18FS1d">:;L1/I/%67,-IdJ1& /d g6&H.l(_),:X>,%FFAB!M %18FS1d"& * ^h*p mmHg = 6&$ &(^ * ;>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 $>ik ( ) Q 1 (l %m X # m /d g #  j  ( ; :QRS1/ $AE@Gd# $AE !6YA87: ):;<,A. $!M/ 01!6Y61M//1: :X7,$%%18I/,4#0% m /!A3& ) m 6&  m k ) >) , ) ,  l h Hình 2 V 1 C  R L r V 2 Q R M i Bùi Sỹ Khiêm THPT Tĩnh Gia 2- Tĩnh Gia –Thanh Hóa DĐ: 0972549023 /?>,$<B$2/ ) m 6&  m : H?>,$%%18I/,4HY%nI//6Y ) X #  X 0& ) l 6&  l : oM@Ck )#h j(  p q ri )* ;( s tp q ) l ()9*X q  l (**X: Câu 4:(5 điểm) /81F,RD ) #D   -AF# C0u ) #u   -!/1Tl6& fACF:6JMvRQ -A781FD ) =>]?#/ %M 4T1 fS1/$& ) :26J 3# gg/81F>% M 4TS1/$&  : /?>,$<B$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#, 6Y/dL1#, $AE!!A3 \HY6&!@Gd@c: \dYJM,4 $6&A>H&dMZ!Y&F$,6&>,<! 3 $@1I/C $: …………………………………… Hết……………………………………   Q  l D )  D   >] Bùi Sỹ Khiêm THPT Tĩnh Gia 2- Tĩnh Gia –Thanh Hóa DĐ: 0972549023 ĐÁP ÁN Câu Nội dung Điểm Câu 1 (5đ) ):/? )  )* + k rad s m m ω = = + 4(* * x A cm rad ϕ π ⇒ = − = − ⇒ = x1dA/MZA>@/ k %=)* ?x t π = + ,: 0,25 0,25 0,5 H?N/58 "6J@   K )  Y  Z<6J1d" A K )  Y  ) ) ) ) %  i x c A π ϕ ϕ = = ⇒ = −     %  ] x c A π ϕ ϕ = = ⇒ = − S1O  ) ) π α ϕ ϕ ∆ = − =  x1dA/# )* t s α π ω ∆ = = 0,25 0,25 0,25 0,5 ?X3AFI/6JEN ", ) & ) ) ] t π ϕ ω π π = + = + S1Ok : _#9 _  t rad π α ω π π = ∆ = = + y1\ N  kx(_:zx *  K6A/# %1dA/x * (    A  x1dA/x()hz  (i]#_i=,? 0,25 0,25 0,25 0,25 0,25 @?   )* iv A x ω = ± − = ± ,+% 0,5 :UO1d" I/,#aZ!2/, ) 6&,  &,,  @ : oM@C 31J1Zks(,  /(r,   x ω XJ17H3!a F r 7VL1G,# *x⇒ > {L1$ "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 = = 0,25 0,25 0,25 i     )     ) Bùi Sỹ Khiêm THPT Tĩnh Gia 2- Tĩnh Gia –Thanh Hóa DĐ: 0972549023 4( * #> * (6&6 * (*#%1dA/ * ϕ = ZA>@/  ( ) )  % )*  +)*x c t π   = −   ,67 * t t≥ 0,25 Câu 2 (3đ) /?Wx&Y@$I/:UOFA:|A4!H/ 01/k ) * ) ^h* ^9i ^= ?p p h mmHg = − = − = q ) (^z^i(i**=}?qX ) (9^x=,, i ?: |A4!%/1k  = ?q kq p p h mmHg= −   (z^i=}?qX  (x=_)*r?=,, i ? oM@CMA4!/k  ) )   ) )  ) )   )  )  )  ^i )#ii = ? _)* kq kq p V p V pV T pV T t p p h p h h mmHg T T TV TV h + = ⇒ = = − ⇒ = + = + −  /d%k ^i )#ii = ? _)* kq t p h mmHg h + = + − 67FH.,, 0,25 0,25 0,75 0,75 H? VH&A//Mk i) ^i ^9) )#ii =~? _)* h h + = + − TM=~?/$,(^]]#_,, 0,5 0,5 Câu 3 (5đ) /?W$M/2/ $!MI/,4;#;Q67@ $0& ) ϕ #  ϕ ) / C Z R ϕ − = #  / L Z R ϕ = )    / / ) C L L Z Z C R R ϕ ϕ − − = = = − ⇒  $!M/ 016Y61M/67/1: 0,5 0,5 0,5 0,5 :/??/k ( ) ( )     )  )    % ) )   R R R L R L C C ϕ ω ω ω ω = =     + − + −  ÷  ÷       )  )  ) ) L L C C ω ω ω ω     − = −  ÷  ÷     ( ) ( ) )  )  )  )  ) ) ) * ) ) ) * L C L C ω ω ω ω ω ω ω ω    − − − =   ÷    ⇒     + − + =  ÷     )  )  )  ) * ) ) L C LC LC ω ω ω ω ω ω  + =   ⇒  = → =   0,5 0,5 0,5 H?/k    )R C U U U+ = #    R L U U U+ = #  L R C = 0,5 ] =4? Bùi Sỹ Khiêm THPT Tĩnh Gia 2- Tĩnh Gia –Thanh Hóa DĐ: 0972549023  L C R U U U→ = ]   )    R R R U 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 AB U U U U U U ϕ → = = = + 0,5 0,5 Câu 4 (5đ) /?ANMD ) A7D  67@ ) (/k • ) ) ) € @ r€ = 6& • ) ) )  ) ) ) €  € € @ @ r€ r€ l l l l − − = − = − = xM@4I/$k )  )  ) )   )  ) )  € € € €  : r€ @ r€ = € € ? € € €l l     = − − =  ÷  ÷ − − − +     x1dA/k ) =lw€ ) w€  ?( ) l€ ) w ) € ) €  z€ ) €  =)? ZaANMD  EA7D ) /k   =lw€ ) w€  ?(  l€  w  € ) €  z€ ) €  =? ;/=)?6&=?/1 "•6&HY g/ k  )   =€  w€ ) ?(€ ) €  =  w ) ? }YS1Tku ) wu  (  ) )    ) :   l   −  ÷   0,5 0,5 0,5 0,5 0,5 0,5 H?W&H!F,-01I/D ): X7H!FI/,-01I/D  78M)#9 0H!F,-01I/D ) /k u ) (=w)? )  6&u  (=w)? ) )#9: n%k )  u )#9 u = =i? K!%$1 Lku ) wu  (i=]? T$=i?6&=]?/ ku ) ()9@M6&u  ()@M 0,5 0,5 0,5 0,5 Câu 5 (2đ) 5,4 $>6‚:{$!M/dL1 g6&N0 %€: ruf6Y/dL1  $!M0k l  ql ;  rU! 3 $@1I/C $V< YJM : r;<! 3;k ;N @ $$1@CS1/,4&k R U I R = =)? -!k  C C C U I U fC Z π = = =? K=)?6&=?%1dA/k   R R C C U U I U fC C R fRU π π = = ⇒ = =i? 0,25 0,25 0,5 0,5 0,5 9 A R C B V Bùi Sỹ Khiêm THPT Tĩnh Gia 2- Tĩnh Gia –Thanh Hóa DĐ: 0972549023 …………………………………………… Hết…………………………………………… h . 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) . Hết……………………………………   Q  l D )  D   >] Bùi Sỹ Khiêm THPT Tĩnh Gia 2- Tĩnh Gia –Thanh Hóa DĐ: 0972549023 ĐÁP ÁN Câu Nội dung Điểm Câu 1 (5đ) ):/? )  )* + k rad s m m ω = = + 4(* * x A cm rad ϕ