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Đề thi thử học kì 1 năm học 2009-2010

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Së GD & §T ĐỒNG NAI TRƯỜNG THPT XUÂN LỘC (§Ò thi gåm 4 trang §Ò thi kiÓm tra chÊt lîng häc kú I M«n thi: VËt lÝ - Líp 12 Thêi gian lµm bµi: 60 phót §Ò thi cã 50 c©u Hä vµ tªn thÝ sinh Sè b¸o danh CƠ HỌC VẬT RẮN Câu 1.  !"#$%& '()*+ ,#- ./0#&12- 3/0*+12- 4()*+12- Câu 2.5#6  !"#$%&/0*+/+7#89:;#<&/+ '*= . 312- 4*= Câu 3.>)<#&/+ '?8 .?8 @  3*?8 4*?8 @ Câu 4.>)<##&/+ A. #?8 B. *?8 @  C. #*?8 @  D. *?8 Câu 5.512-5  !"#$%& '#& ,#12-(!A#.##&12-(!A# 3/0#*+12-(!A# 4#&12-(!A# Câu 6.5*=9B  !"#$%B/CD#+!8Ekhông FG A. H*+ B. H#&C. I2F2 D. IC0#E Câu 7.5&!(:J0K9-#!(<#!B /L*#/0K/+5I#&M+CD*C0*#<!(&/+ ' γ I M = 2 . γ M I = 3 γ M I = 2 4 γ I M = Câu 85!(:<0Kkhông F+! A. :<K B. /CD#< C. #&N#&< D. :C0+*B#< Câu 9.5O1=P#1=*=O0# #& ,#-17#@*?8 @ I&+OCD8A#Q%8 R O1=/+ '@%* .Q%%* 3S%* 4Q%* Câu 10.51=*=TS8 R/U1=6 #&<&/017#Q%*?8TV8 R/U1=6+CD#&17# A. S* B. Q%* C. W* D. V* Câu 11.5&!(:0/+Q% # @ 6#0 #&V%X#?FUY; Z @ [Q% >#\#<+17# A. ]%^ B. S%^ C. _S^ D. @S^ Câu 12.5B&!(:0/+%6@ # @ ## 0/0#&`[Q%%*?8>#\#<B#/+ '@%%%^ .@%^ 3Q%%%^ 4Q%^ DAO ĐỘNG CƠ HỌC Câu 13.5!/#a/X! /CD# ,## &P# 6=#b& /CD# 6=X/BCD(!+!3!/*!#X(!FC)#c#P#3 d *!#<!//+ ' m T kπ = 1 2 . k T mπ = 1 2 3 k T m π= 2 4 m T k π= 2 ĐÒ # Câu 14.5b*!#Xe(!FC)#['!8NωfϕH<& 1P/+ A.  [ `' !8 N `  f ϕ   B.  [g `' 8 N `  f ϕ   C.  [g '8 N `  f ϕ   D.  [ `' 8 N `  f ϕ   Câu 15.5;*!#X!Bc#'.:E17#6()<;  A. /,&C0#2' B. &/0LB C. 17# ,# D. /,&C0#2. Câu 16."hCD##C#)2F*!# '0=817#=8*!## .0=8b)=8*!## 30=8/0)=8*!## 4 i  ,##!B/L j *# Câu 17.5!//X!*!#!+0FC)#['!8`+&)\#/+k>#\#< BA/+ ' d E E cos tω= 2 . d E E sin tω= 4 33k  [k!8 @ ` 4k  [k8 @ ` Câu 18.5!//X!#a1b& /CD#+/X! /CD# ,## &P# 6 *!#X(!FC)#c#P#B)&#)L*!/+#1:E17#6/X! *l!B ∆l 3 d*!#X<!/+/+ ' # @π ∆l  . @ # ∆ π l 3 Q  @ π  4 Q @ π  Câu 19.5*!#X)1'6=8#&ω3m#A#/+/U:E 17#(!*C)#nC)#*!#</+ '['!8Nωfπ?] .['!8ω 3['!8Nω−π?@ 4['!8Nωfπ?@ Câu 20.5*!#!+*m(!e01'6=8o3m#m:E17# <6#A#![%/+/U:['Y<CD:(!1P '['!8N@Zo .['!8N@Zofπ?@3['!8N@Zo−π?@4['!8NZo Câu 21.3)\#<*!#X '12=!+(!A#0 d17#p d*!#< .\##;F, 1*!#<\##;F, 317##\#< 0:E17# 412=!+(!A#0 d17# d*!#< Câu 22.5*!#X*m(!e0FC)#['!8ωq2m#meB :E17#<#A#[%/+/U ':/LBF=*C)#<e .:E17#e#CD*C)#<e 3:/LBF=E<e 4:E17#e(!*C)#<e Câu 23.5!//X!#ar#& /CD#]%%#+/X!&P#]%q?3!/+*! #X0 17# A. . 5 s π . 5 .s π 3 1 . 5 s π 4Sπ8 Câu 24.s*!, t # i ! i  i #FC)#! j FC)#u i  Q ['!8Nωfπ?VN i  @ ['!8Nω− @π?VN/ i @*!, t # '#C) t F . i #F 3/ t Fπ?@ 4/ t Fπ?V Câu 25.9B)6!/)*!#X0 d96 *+!/\#] /= d!/ ' ,#- .\#Qv/= 3\#@/= 4\#]/= Câu 26.9B)6 *!#!+<!/)/+@6%8T \#*+<! /@Q *!#!+<&/+@6@83*+1=<!/+/+ A. 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#/+*!#hRL*!4q\#/CD#hCA#12y#=80*!#hR!# B Câu 39.3mEsai9!#B*!#Y361C08&#hR+B&&F!#E ,#/+ A. z[?o.z[93z[@Z Y3 4z[@ZJ % ?~ %  9!#&J % /+CA#LB<*X#h!#B•~ % /+h:LB1" Câu 40.q\#/CD#hR!#B*!#CD:(!,#P A. €[3• @ ?@.€[YJ @ ?@3€[~ @ ?@34€[3 @ ?@fY @ ?@ Câu 41.9!#B*!#hRY36 d*!#<B&CD:17#,#P A. 9[ 3 @ Y π .9[ Y @ 3 π 39[ Q @ Y3π 49[ ! ! ~ @ J π Câu 42.9!#B*!#Y36h:1"12Xy#=8+&F8!0 =1" A. y#F.80FZ?@3‚FZ?@4"VE8 Câu 43.5B*!##a="&Y[%6VQws+h&3[%6VQwƒ„3 *!# <B/+ A. @8.%6@83%6%@84%6%%@8 Câu 44.5B*!#Y3#a="&Y[Q?Zs+h&3[Q?Zƒ„9=8*! 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Qw%s{.Q@%s{3v%s{4@%s{ Các câu hỏi trong các chương A> >#/LmQ@ENwY9]*‚6]9.•N].9@*‚•@ & B>4!#)mQ]ENQ%Y9S*‚•V9.•@&•N.9@*‚•@ & C>T&#)Q%ENvY9]*‚•@ &•N].9@*‚•@ & D> T&#hRQ%ENvY9@*‚6@9.6@ &•N].9@*‚•@ & E>4X#h!]ENVY9@*‚6Q9.•NQ.9Q9. Lưu ý……3E+/+E*‚ ……3E+/+E#1 ……3E+b/+E & đề 1 Së GD & §T ĐỒNG NAI TRƯỜNG THPT XUÂN LỘC (§Ò thi gåm 4 trang §Ò thi kiÓm tra chÊt lîng häc kú I M«n thi: VËt lÝ - Líp 12 Thêi gian lµm bµi: 60 phót §Ò thi cã 50 c©u Hä vµ tªn thÝ sinh Sè b¸o danh Câu 1:!"##xFC)#8&##=;+*!#y#F0#m/+ A. 1C08&# B.  d C. 8&# D. /hF Câu 2:5!(:<0Kkhông F+! 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Q%%* B. Q%* C. S%* D. @%* Câu 20:5*!#X*m(!e0FC)#['!8ωq2m#meB: E17#<#A#[%/+/U A. :/LBF=E<e B. :E17#e#CD*C)#<e C. :/LBF=*C)#<e D. :E17#e(!*C)#<e Câu 21:5/h#x1C08&#z68&#v6 T +=8f <8&#/+ A. v v.f T λ = = B. T f v v λ = = C. v f T λ = = 1 D. T v f λ = = 1 Câu 22:58&#)m&1C08&#z(!CA#c# R52q.2 !"# 5q[*>/hF Kϕ <*!#B5+q/+ A. ∆ϕ[ d π λ B. ∆ϕ[ d πλ 2 C. ∆ϕ[ d π λ 2 D. ∆ϕ[ d πλ Câu 23: .5B*!##a="&Y[%6VQws+h&3[%6VQwƒ„3 *!#< B/+ A. %6%@8 B. %6%%@8 C. %6@8 D. @8 Câu 24:3‡#*y#*X#h!&=8S%s{8ˆF8#!r A. @S/=‰#EB. Q%%/=‰#EC. S%/=‰#ED. T# ,# Câu 25: .5#aF8&#*!#(!FC)#[!8@%πN0:17##E9!# !"#A #@868&#+CDl#CA#17#1!/=1C08&#G A. V% B. Q% C. @% D. ]% Câu 26:5;*!#X!Bc#'.:E17#6()<; A. &/0LB B. /,&C0#2' C. 17# ,# D. /,&C0#2. Câu 27:9!#B*!#hRY36 d*!#<B&CD:17#,#P A. 9[ ! ! ~ @ J π B. 9[ Q @ Y3 π C. 9[ Y @ 3 π D. 9[ 3 @ Y π Câu 28:5*!#X)1'6=8#&ω3m#A#/+/U:E17# (!*C)#nC)#*!#</+ A. ['!8Nω−π?@ B. ['!8ω C. ['!8Nωfπ?@ D. ['!8Nωfπ?] Câu 29:9!#B*!#Y36h:1"12Xy#=8+&F8!0= 1" A. "VE8 B. 80FZ?@ C. ‚FZ?@ D. y#F Câu 30:9B)6 *!#!+<!/)/+@6%8T \#*+<!/ @Q *!#!+<&/+@6@83*+1=<!/+/+ A. WW B. Ww C. Q%Q D. Q%% Câu 31:5!//X!#a1b& /CD#+/X! /CD# ,## &P# 6*! #X(!FC)#c#P#B)&#)L*!/+#1:E17#6/X!*l !B ∆l 3 d*!#X<!/+/+ A. # @ π ∆ l  B. Q  @ π  C. @ # ∆ π l D. Q @  π  Câu 32:8&#)&=8S%s{!#,CA#0Qv%?8|y#A6#= ;FC)#8&#&*!#y#F06 A. @6] B. V6@ C. Q6v D. %6w Câu 33:5B&!(:0/+%6@ # @ ##0 /0#&`[Q%%*?8>#\#<B#/+ A. Q%%%^ B. @%%%^ C. Q%^ D. @%^ Câu 34:3 *!#hRL*!!#BY63CD A. 9[@Z Y 3 B. 9[Z 3 Y C. 9[ Z @Y3 D. 9[@Z Y3 Câu 35:5!//X!#ar#& /CD#]%%#+/X!&P#]%q?3!/+*!# X0 17# A. 5 .s π B. 1 . 5 s π C. . 5 s π D. Sπ8 Câu 36:&8&#*R#8D*E+a !"##x1#8&#/2F17# A. 1C08&# B. 1C08&# C. p1C08&#D. F=C1C08&# Câu 37:5!/#a/X! /CD# ,## &P# 6=#b& /CD#6= X/BCD(!+!3!/*!#X(!FC)#c#P#3 d*!#<! //+ A. m T k π = 1 2 B. m T k π= 2 C. k T m π= 2 D. k T m π = 1 2 Câu 38:58&#!#,CA#0QQ%?8+&1C08&#%6@S9=8<8&#&/+ A. @_6Ss{ B. S%s{ C. @@%s{ D. ]]%s{ Câu 39:512-5  !"#$%& A. ##&12-(!A# B. #&12-(!A# C. #& ,#12-(!A# D. /0#*+12-(!A# Câu 40:3)\#<*!#X A. 17##\#< 0:E17# B. \##;F, 1*!#<\##;F, C. 12=!+(!A#0 d17#p d*!#< D. 12=!+(!A#0 d17# d*!#< Câu 41:3CA#PA<*X#h!#B*!#/+[%6%S!8@%%%9h!#B&h*# 3[Sƒ„>L"<*E/+ A. SQ% …S s B. Q%%s C. %6Ss D. %6%Ss Câu 42:>r+!=="Y!•[@@%H6o[v%s{4X#h"& CA#@6]'>!*X#h"&CA#/+_6@'=8<*X#hF"17# A. @%s{ B. v%s{ C. Qw%s{ D. Q@%s{ Câu 43:5b*!#Xe(!FC)#['!8NωfϕH<&1P /+ A.  [ g `' 8 N `  f ϕ   B.  [ `' 8 N `  f ϕ   C.  [ g '8 N `  f ϕ   D.  [ `' !8 N `  f ϕ   Câu 44:5!//X!*!#!+0FC)#['!8`+&)\#/+k>#\#<B A/+ A. k  [k8 @ ` B. d E E sin t ω= 4 C. 3k  [k!8 @ ` D. d E E cos tω= 2 Câu 45:s*!, t # i ! i  i #FC)#! j FC)#u i  Q ['!8Nωfπ?VN i  @ ['!8Nω−@π?VN / i @*!, t # A.  i #F B. #C) t F C. / t Fπ?@ D. / t Fπ?V Câu 46:"hCD##C#)2F*!# A. 0=8b)=8*!## B. 0=8/0)=8*!## C. 0=817#=8*!## D.  i  ,##!B/L j *# Câu 47: .5#6 !"#$%&/0*+/+7#89:;#<&/+ A. *= B. 12- C. *= D.  Câu 48:5B*!#Y3#a="&Y[Q?Zs+h&3[Q?Zƒ„9=8*!#< B/+ A. @S s{ B. S% s{ C. @S%s{ D. S%%s{ Câu 49:5&!(:J0K9-#!(<#!B/L *#/0K/+5I#&M+CD*C0*#<!(&/+ A. γ M I = 2 B. γ I M = C. γ I M = 2 D. γ M I = Câu 50: .3mE"/Asai. 4X#h! A. 11F"&CA#PA12-(!A#17#+88 B. #ERCA#12 C. CD*y#Bh6Uh D. #E*#hh …………………………………………………………………………………………………………………………… ……………………………sŠ9………………………… đề 2 Së GD & §T ĐỒNG NAI TRƯỜNG THPT XUÂN LỘC (§Ò thi gåm 4 trang §Ò thi kiÓm tra chÊt lîng häc kú I M«n thi: VËt lÝ - Líp 12 Thêi gian lµm bµi: 60 phót §Ò thi cã 50 c©u Hä vµ tªn thÝ sinh Sè b¸o danh Câu 1:5;*!#X!Bc#'.:E17#6()<;  A. /,&C0#2' B. 17# ,# C. /,&C0#2. D. &/0LB Câu 2:5*!#X)1'6=8#&ω3m#A#/+/U:E 17#(!*C)#nC)#*!#</+ A. ['!8Nωfπ?] B. ['!8Nωfπ?@ C. ['!8Nω−π?@ D. ['!8ω Câu 3:5B*!#Y3#a="&Y[v]%ƒs+h&h*#312 RVvF„2@@SF„Y;Z @ [Q%3 *!##<B&12R A. 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S%/=‰#E D. @S/=‰#E Câu 5:3)\#<*!#X A. 12=!+(!A#0 d17#p d*!#< B. 17##\#< 0:E17# C. 12=!+(!A#0 d17# d*!#< D. \##;F, 1*!#<\##;F, Câu 6:5b*!#Xe(!FC)#['!8NωfϕH<& 1P/+ A.  [g '8 N `  f ϕ    B.  [ `' 8 N `  f ϕ    C.  [ `' !8 N `  f ϕ    D.  [g `' 8 N `  f ϕ   Câu 7:&8&#*R#8D*E+a !"##x1#8&#/2F17# A. p1C08&# B. 1C08&#C. 1C08&#D. F=C1C08&# Câu 8:3CA#<*X#h!&1P[]!8NQ%%Z…Z?@N'Ih*#< *X#h/+ A. @' B. ] @ ' C. @ @ ' D. ]' Câu 9: .5#aF8&#*!#(!FC)#[!8@%πN0:17##E9!# !"#A#@868&#+CDl#CA#17#1!/=1C08&#G A. @% B. Q% C. V% D. ]% Câu 10:5&!(:J0K9-#!(<#!B /L*#/0K/+5I#&M+CD*C0*#<!(&/+ A. γ I M = 2 B. γ I M = C. γ M I = 2 D. γ M I = Câu 11:>)<#&/+ A. *?8 @ B. *?8 C. ?8 @  D. ?8 Câu 12:5!/#a/X! /CD# ,## &P# 6=#b& /CD# 6=X/BCD(!+!3!/*!#X(!FC)#c#P#3 d *!#<!//+ A. k T m π= 2 B. m T k π = 1 2 C. k T m π = 1 2 D. m T k π= 2 Câu 13:9!#B*!#hRY36 d*!#<B&CD:17#,#P Mã đề 209 A. 9[ Y @ 3 π B. 9[ Q @ Y3 π C. 9[ ! ! ~ @ J π D. 9[ 3 @ Y π Câu 14:5*=9B  !"#$%B/CD#+!8Ekhông FG A. H#& B. I2F2 C. IC0#E D. H*+ Câu 15:58&#!#,CA#0QQ%?8+&1C08&#%6@S9=8< 8&#&/+ A. @@%s{ B. ]]%s{ C. S%s{ D. @_6Ss{ Câu 16:8&#)&=8S%s{!#,CA#0Qv%?8|y#A6 #=;FC)#8&#&*!#y#F06 A. @6] B. %6w C. V6@ D. Q6v Câu 17: .3mE"/Asai. 4X#h! A. CD*y#Bh6Uh B. #ERCA#12 C. #E*#hh D. 11F"&CA#PA12-(!A#17#+88 Câu 18:5!//X!#a1b& /CD#+/X! /CD# ,## &P# 6 *!#X(!FC)#c#P#B)&#)L*!/+#1:E17#6/X! *l!B ∆l 3 d*!#X<!/+/+ A. Q  @ π  B. @ # ∆ π l C. Q @  π  D. # @ π ∆ l  Câu 19:5B*!#Y3#a="&Y[Q?Zs+h&3[Q?Zƒ„9=8*! #<B/+ A. @S s{ B. S% s{ C. @S%s{ D. S%%s{ Câu 20:5!(:<0Kkhông F+! A. :C0+*B#< B. :<K C. #&N#&< D. /CD#< Câu 21:q\#/CD#hR!#B*!#CD:(!,#P A. €[YJ @ ?@ B. €[3• @ ?@ C. €[3 @ ?@fY @ ?@ D. €[~ @ ?@3 Câu 22:9B)6 *!#!+<!/)/+@6%8T \#*+<!/ @Q *!#!+<&/+@6@83*+1=<!/+/+ A. Q%Q B. Q%% C. Ww D. WW Câu 23: .5B*!##a="&Y[%6VQws+h&3[%6VQwƒ„3 *!# <B/+ A. @8 B. %6%%@8 C. %6%@8 D. %6@8 Câu 24:5&!(:0/+Q% # @ 6#0 #&V%X#?FUY; Z @ [Q% >#\#<+17# A. _S^ B. @S^ C. ]%^ D. S%^ Câu 25:3 *!#hRL*!!#BY63CD A. 9[@Z Y3 B. 9[Z 3 Y C. 9[ Z @Y3 D. 9[@Z Y 3 Câu 26:5/h#x1C08&#z68&#v6 T +=8f <8&#/+ A. v f T λ = = 1 B. T v f λ = = 1 C. T f v v λ = = D. v v.f T λ = = Câu 27:3mEsai9!#B*!#Y361C08&#hR+B&&F!#E ,#/+ A. z[9B. z[@Z Y3 C. z[?o D. z[@ZJ % ?~ %  9!#&J % /+CA#LB<*X#h!#B•~ % /+h:LB1" [...]... bng giõy) Vn tc truyn súng ny trong mụi trng trờn bng A 5 m/s B 50 cm/s C 40 cm/s - - HT D 4 m/s S th t 13 2 209 357 485 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 A C A B B B D D A B D B D C C B D B A C C C B B C A A A D D C B A D C C B D B A D A A A B C D D D C D C B B... THPT XUN LC (Đề thi gồm 4 trang) Đề thi kiểm tra chất lợng học kỳ I Môn thi: Vật lí - Lớp 12 Thời gian làm bài: 60 phút Đề thi có 50 câu Họ và tên thí sinh Số báo danh : Mó 357 Cõu 1: Mt cỏnh qut cú momen quỏn tớnh i vi trc quay c nh l 0,2kg.m 2 ang quay u xung quanh trc vi ln vn tc gúc = 10 0rad/s ng nng ca cỏnh qut quay xung quanh trc l A 20J B 2000J C 10 J D 10 00J Cõu 2:... ng iu hũa vi chu kỡ bng 1 5 s A B s C 5 s D s 5 5 - - HT 4 Sở GD & ĐT NG NAI TRNG THPT XUN LC (Đề thi gồm 4 trang) Đề thi kiểm tra chất lợng học kỳ I Môn thi: Vật lí - Lớp 12 Thời gian làm bài: 60 phút Đề thi có 50 câu Họ và tên thí sinh Số báo danh : Mó 485 Cõu 1: Cng ca mt dũng in xoay chiu cú biu thc: i = 4cos (10 0t - /2) (A) Giỏ tri hiu... A 12 0Hz B 20Hz C 60Hz D 18 0Hz Cõu 10 : Trong mch dao ng in t LC, chu k dao ng ca mch cú th c tớnh bng cụng thc: A T = 2 C L B T = 2 L C C T = Q 1 2 LC o D T = 2 I o Cõu 11 : Mt con lc gm lũ xo khi lng khụng ỏng k cú cng k, mt u gn vt nh cú khi lng m, u cũn li c treo vo mt im c nh Con lc dao ng iu hũa theo phng thng ng Chu k dao ng ca con lc l A T = 2 k m B T = 1 k 2 m C T = 2 m k D T = 1 m 2 k Cõu 12 :... quay c nh l 10 kg.m , ang quay u vi vn tc 2 gúc 30 vũng/phỳt Ly = 10 ng nng quay ca vt ny bng A 25 J B 75 J C 50 J D 40 J Cõu 35: Mt cỏi a ban u ng yờn bt u quay nhanh dn quanh mt trc c nh i qua a vi gia tc gúc khụng i bng 2 rad/s2 Gúc m a quay c sau thi gian 10 s k t khi a bt u quay l A 10 0 rad B 10 rad C 50 rad D 20 rad Cõu 36: Mch dao ng gm cun thun cm cú L = 0, 318 H v mt t in cú C = 0, 318 F.Chu kỡ... k dao ng iu hũa ca con lc ny l l g 1 k 1 m A 2 B C D 2 g l 2 m 2 k Cõu 17 : n v ca gia tc gúc l 2 B rad/s A rad/s 2 D kg.rad/s C kg.m/s 2 Cõu 18 : Mt vt rn cú momen quỏn tớnh i vi trc quay c nh l 10 kg.m , ang quay u vi vn tc 2 gúc 30 vũng/phỳt Ly = 10 ng nng quay ca vt ny bng A 50 J B 75 J C 40 J D 25 J Cõu 19 : Hai dao ụ ng iờ u hoa cung phng co phng trinh x1 = Acos(t + /3) (cm) va x2 = Acos(t... bng: A 12 0Hz B 18 0Hz C 20Hz D 60Hz Cõu 29: Mt cỏi a ban u ng yờn bt u quay nhanh dn quanh mt trc c nh i qua a vi gia tc gúc khụng i bng 2 rad/s2 Gúc m a quay c sau thi gian 10 s k t khi a bt u quay l A 10 rad B 50 rad C 10 0 rad D 20 rad Cõu 30: Trong mch dao ng LC, in tớch trờn bn t bin thi n iu hũa cựng tn s v cú pha so vi ht hai u bn t: A cựng pha B sm pha /2 C c 3 cõu u sai D tr pha /2 Cõu 31: Mt... Cõu 12 : n v ca gia tc gúc l 2 2 A rad/s B kg.m/s C kg.rad/s D rad/s Cõu 13 : Cng ca mt dũng in xoay chiu cú biu thc: i = 4cos (10 0t - /2) (A) Giỏ tri hiu dng ca dũng in l: A 4 2 A B 2 2 A C 4A D 2A Cõu 14 : Mt vt rn bt u quay nhanh dn u quanh mt trc c nh Sau 5 s k t lỳc bt u quay, vn tc gúc ca vt cú ln bng 10 rad/s Sau 3 s k t lỳc bt u quay, vt ny quay c gúc bng A 3 rad B 10 rad C 9 rad D 5 rad Cõu 15 :... 16 ln D tng 2 ln Cõu 35: Mt cỏi a ban u ng yờn bt u quay nhanh dn quanh mt trc c nh i qua a vi gia tc gúc khụng i bng 2 rad/s2 Gúc m a quay c sau thi gian 10 s k t khi a bt u quay l A 50 rad B 10 rad C 20 rad D 10 0 rad Cõu 36: Mt ngun phỏt súng dao ng theo phng trỡnh u = acos20t(cm) vi t tớnh bng giõy Trong khong thi gian 2 s, súng ny truyn i c quóng ng bng bao nhiờu ln bc súng ? A 40 B 20 C 30 D 10 ... mi giõy B 10 0 ln mi giõy C Sỏng u khụng tt D 50 ln mi giõy Cõu 10 : Súng c truyn trong mt mụi trng dc theo trc Ox vi phng trỡnh u = cos(20t 4x) (cm) (x tớnh bng một, t tớnh bng giõy) Vn tc truyn súng ny trong mụi trng trờn bng A 5 m/s B 50 cm/s C 40 cm/s D 4 m/s Cõu 11 : Cng tc thi ca dũng in trong mch dao ng l i = 0,05cos2000t.T in trong mch cú in dung C = 5F t cm ca cun dõy l: A 10 0H B 5 .10 -5H C 0,05H . !"##x 1 #8&#/2F 17 # A. F=C1C08&# B. 1C08&# C. p1C08&# D. 1C08&# Câu 31. 8&#ER,CA#. !"##x 1 #8&#/2F 17 # A. p1C08&# B. 1C08&#C. 1C08&#D. F=C1C08&#

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