  TiÕt1 - B ià   !"#     !"" #$%&'())*+, -./0#-12#$!"($$#3//4 15617 89!"):1,#;<=1>%?/$@A)B$ *#$% &BC!D)*+,-./0#-12#$!"( $$#3//415617 EFG# H%I$J()K; L:1,#1,#,(8M&@/%+J& L:1,#%-)C#3&N!D$$!"0#-12# $ FG#!9!"):B ;< O- P %MQ RSTUVWUXPYZ W(!R'#+,#-1#'#[\LW]@'#E[^ LW] R'# ?( _4( Y$$ [8] 0#- 12# $[]  ` ` E E@a `@ O ^@\ `@E \ b@ `@Eb ^ `@b `@Ob R'#E ?( _4( Y$$  [8] 0#- 12# $[]  E@` `@ E E@^ O `@E \ `@E^ ^ c@`  !" #$%&'()"*+ EdN%Q) -15617e#M%D1"b``%%@0#& `@O%%@156 "6?f)g,)[#QB"$h%7] /%+J&N#iI( !M&N#iI(c8@E8 M#H #;$%-Dc8 (I156  jYklWjYmj*?/@*#$% M#(1I#;<A&?'!i%-15617& UnYoYpXSqWUXPYZ ổn định tổ chức : rsrRss 2:Kiểm tra: Sự chuổn bị của học sinh 3:Bài mới: Hoạt động 1 : Thu thập thông tin Y(I-#./46 Y(I-#./2 $W86489)K;%I $#;%#;$@N# t@!M&@/%+J&@ M#H(#N!M&( $$#3//4N# t@/%+J&(0#-12# $?/t W' %H!M&@ /%+J&(#%I$N [WQYLu#+(#] W8S8SvBi+a/w &$$x!"(N# t"#Biy0#-12# $?/N#t"#Bi!" t"#)#8C60#- 12#$I6?/15617N zB$!i$$x!"( /4156/6&M#{ 'B05|"6@J(J% }#/+'" #$%"({ K)h+K#&=%/ YL [N]W8+5 }#@ )/~" #$% $YL89)K;%I$!"#' %H!M&@/%+J& $%&'(')*&+,-.,/*0,-*123 4153/('67)*8/*9:;;<';&=,- %:>?,-%12,@9'>AB>C,DEF*129 %12,/*G-1H'*'1%I9>AB>C, Hoạt động 2 YLjYYqkWSqUW S8pYSYWYSUPU W864YLy%=%I $Yy[\LW]@&=@ M#1,#@%H- +C(#)K;@u# []@[]!"(1,#,()K ;%I$ P4YLQ%,E" @i" W8Yi#17B"%/6 #$% LK;%I$ , 8 8 S(I156 17/#u E O \ ^ c •$$x!"(/4 15617e#/6•)+ 1•#B"%#;$ P4YLC1,#, "J(N%@#& ?'!"('# W8&=%/N%"  #$%@HhQz )1,#,(@&=%/ =%+u}%IQ u(#&?'+'#H%I= )/)(&?')/ W8#QI$N%Q& ?' #$%@W8#B'# +, WQN%&'B05 A&?' #$%./N% W8#&?' #$% ./N%P4YL# 5'B0!"(!h E" #$% H%I$J()K;y  [ŽU56A*5% (I15617/#u• ŽU56EA(I15617/#u• }%[].//%+J& ŽU56OA}%[Ž].//%+J& &( ŽU56\A&(h!D* 1K#./#; ŽU56^@156cA}%[]@ [Ž]./!M&%H!"(/4 (I15617/#u•] S(0#-12#$K# #!i%d$$x !"(/4156 W&?'!"('#~'B0 5 ‘Cu•G#[(x#'%] $$x!"(/4156 17/(B4y0#- 12#$I6?/15617N ’#G#[(x#'%]f6 B4 Ho¹t ®éng 3 8“8†L”UWSTY•S€–—–‡_˜ P4YLQ+4M#( %,UI#;<@'B05 | Žx=%0#=1> )*+,-./!"( ŽU*/!"(;<( ™@^8~™{ ™O8~™{ ™c8~™{ W8i#17BI!9;< !"64A#YL'B05E !"(!h WQYLCu•!D;< ./%y@W8#' ?' (2%H)/)@1(N0# =1>?/#4f' =%=1> J/*KL159>1M,67)*8/*9:; ;<';&=,-%:>?,-%12,DEF*129 %12,/*G UI#;<  Sx=%;<=1>)* +,-./!"(B"0# š#?/#(I- E - ` E@a @a ^@\ @a b@ `@b [8] `@ `@E `@O `@\ [] &BC!D%?/$ #3/!" BCY$$#3// 415617G#[(x#'%]/( B4y0#-12#$ I6?/15617N’#G# [(x#'%]f6B4 ›8˜UW‚WœYk•WUŒ8žY† P45YL("" 5O WQYL'B05OYL& Cu•~Y(""5O 5YL(""5\ J(N%@#QYLB'# (""'#+, ‘.# P4+=&BC!D ŽL*+,-./0#- 12#$!"($$#3/ /415617 ŽUI#;<=1>)*+, -./!"(#3//4 15617 P4%-YLQBI+4# i" O™E@^8~™`@^ ™O@^8~™`@a ~u<#<@# !i%-=%f&y;< /B"%)/ ŽŸ0#š#)(#)(#!i ,("@H,#I=% N0#-K## ŽŸ0#š#)(#)(#!i ,#@H,("I=% N$$K## \ ? ( _4( Y$$ [8] 0#- 12#$ []  E `@ E E@^ `@E^ O \ `@E YU8ŽYQ-+4#i ŽSQ%%, N=J%/¡ ŽYQ"!"B"%"C+LR . Tiêt2 - NO!"#$PQRST CK!<$h!"!C1,#M# $ h=#'"C+ j=!"!$./<BCÂ% 8C1,#<BCÂ%=#'%-)1I#"C+K#' EFG# L:1,#%-)C#3&N!D$$!"0#-12# $ 89)K;%I$):1,#1,#,(=u<$h./ %-15617 O- ÊC@&y(#QC+ RYÔRWmp88YZLY W8)g'###<K#) / 0 jYklWjYmjU*/!"(&?')B$(#'#!"Eh "@YL K#) / 0 ~Cu C+M#U*/!"()B$Ah"i UnYoYpXSqWUXPYZ ổn định tổ chức : 9A 9B EKiểm tra : =%/" &BC!D%?/$ #3/$$#3//4 15617!"0#-12#$ I6?/15617N EA'#&?')B$h" iw6u<K#) / 0 A&?' #$%w6 Cu W8#QYLCu5'B0 ./I~W8#(=% YL S8S8i15617(#h'#/ f6|?/)/)yK#) / 0 0#-12#$I6?/ %-15617zB$C!i$ $x!"(/415617 N 1234567-68+ EƠ<}#K#) / 0 .68* Cu&?'K#) / 0 N#<#4/!i156 17u<B"%&=% /h'# ,68* 9 N#</8C6!i15617 &&?'N!C6&M#{~R" %i OBài mới Hoạt động1 : điện trở dây dẫn P4A#YL@1*/!"('# E@u<K#) / 0 !i156 17~Cu!"'B05 E W8i#17YL'(BC= 'B05E P4YLQ+4M#( ./%,E!"'B05| M# $h W8#i$& $$h (#)K;%I$@K!< $hP4YL!9)K ;%I$u<$h ./%-15617!" $h WQYLB'#!9)K; %I$@YL&Cu@W8 ):/3/4 Yi#17YLK!< $h L()$h./15617h '#!"E~Ư#F/./ $h S$h./15617 Ơ<K#) / 0 !i %d15617 8i%d15617yK#) / 0 N#<u<!"&M# !i/15617&/y K#) / 0 N#<&/ E S$h M# $h $$h(#%I$ (x LK;%I$ (N# 8 SK!<$hB"Â%@& $Đ : ; = BMM%ă&Đ```Đ@ #/M%ăĐ``````Đ â#F/./$hR=< %-'h12#$D /6 ./15617 Hoạt đông2 :jYmR88RYoSY_ W8i#17YLAM# / / < 0 0 < = = !"M#(56 B"=./<BC Â%P41*/!"(= S<BCÂ% Y$./<BC / 0 < = 6=/63>?:*5 063>(@;*5 <63>?A*+ B 8 <BC¢%w6+=< BC¢% Ej=<BC CD6EF6G%&(FH FIJ&K&6$ 6L(6M&FHJ N6'(FH E.8˜UW‚WœYk•WUŒ8žY† W864YL'B05| SQ@N%HO{ #'{ EAM# / < 0 = @%-YL +=)/ S$h./ %-15617zB$C!i$ $x!"(/415617 !"zB$#<!i0#- 12#$I6?/15617N¡ j=N}#/6)/{I )/({ P4YL'B0\ 5O N%H –™E§ ™`@^ ™{ R"#' m+1,#=< BC¢%  / 0 / 0 < < = ⇒ = /6) ™E§`@^™c8 Y$$#3// 4156NtB"c8 y"646.i@}# [b =%] Ej=NB")/!yz) / 0 B" &M#•!i%-156171( N&M#=N–zB$C!i @zB$#<!i[E =%] \8y•#$$x !"(/415617&/@ zB$#<!i–– E ™O–  y   ™O E  ‘YU8 ¢BI"!"Q&F"E £<%7((*"[`LW](")/!"(!h _"%"C+ELR O  Tiết 3: UVPNOT !"#WXTYZSZ   u<$hAM# $h M' !""u<$h./%-156 17e#!M&!"/%+J& EFG# H%I$J()K; L:1,#}#1,#,(8M&@/%+J& FG#B"%"*"!"!((*" O- £C@&y@#*@}¦/("(#):1,#$ Y+(#(I-#N% P %MQ RY¤R•W8jMM(%dYL%-%7((Y S!i%dN%YL $h/<)[1& <)]#;$c8 /%+J&NWYS!M&NWYSc8@ E8 M#H$(I156 jYklWjYmj*#$% =%/+4£<B 6./YL("Y E/YL"N%@%dN%Y%--1,#, OSI1$N%ª%,!"i"@)/N%i " \Y(I-#N% ^YL(""+4((Y c#0QW8((Y@Cu•!D¦@- !"+(# UnYoYpXSqWUXP H  Z C 1 :æn ®Þnh tæ chøc : 9A . 9B E iªmtra  P4Bi++NQC+(( yy£<"./I (#Bi+ WQYLB'#'B05| Ž5|./%,(#%7( (Y Ž89)K;%I$u< P $h./%-15617e#!M &!"/%+J& W8&=%/+4£<./ YL(#!h WQYLCu•5'B0./ I~S#+4£<" ./YL'Bi+N#!" #(=%YL&=%/ '# OBµi míi : Ho¹t ®éng 1 : Thùc hµnh ®o ®iÖn trë cua mét d©y dÉn. W8/N%@+5M#N% h#P4N%h#./ N%+5M#$%!,./ I(#N%./%y W864#./ Y!D-QC+@¦&z BC W/(1,#,(N% P4N%" J(-1#%,rLW W8J(1ª@#}+«YL%H %I$@&=%/=%+ u}@x$B"%H!M&@ /%+J&!"(%Ii&N# M#H_¦Q&?' (@Q#*hB4( &/ P4N%D+'/% #/Y Y(""((Y/(• N%=Cu•!D#65 #56/)*&/./<) $h!A/ (#%d B4( N%h#:I1$B C1,#,@+5M#I & #•+&?'!"¦& '(BC./I(#N% N%" f'YL(#N%D/% #/%H(xJ(1ª@&=%/ %H./I(#N% SQ&?'(}#?6H 5YL(""'( (Y%,/]@] /(•N%(""C u•] Ho¹t ®éng 2 :nW‡@SmYWmYmSqYZ˜j‚YL W8((Y Cu•}&#$%!D Ž/( Ž-QC+./N% Ž©&zBC EYk•WUŒ8žY† ¢BI&!D%I%H+@)(#)(#wQhBi+a Q Tit 4: [T[\ L6BC=u561*#M# $hK#K#./ (I%I#;%/$h%H+ E !"$ E E / < / < = A&wQ M' &=%/BI$)6/AB 6 8C1,#3#&wQ=#' %-)$ #!"#'"C+!D(I%I+ EFG# FG#Y):1,#1,#,($8M&@/%+J& FG# @"BH++ #$% FG#)6BC@BC+BCBM# O- 8C1,#&wQ=#' %-)$#K#' NB?/(#* P %MQ RYÔRSTUVW S!i%dN%YL O$hB4BN#<c@`@c#;$%- Dc8 /%+J&NWYS!M&NWYS c8 M#H$(I156 jYklWjYmj jK#++*#$% UnYoYpXSqWUXPYZ ổn định tổ chức : 9A . 9B. 2: kiểm tra: =%/" YL j=!"!=./ <BCÂ%{ E3/"C+E[LR] YL'Bi+}ƯBH##J@ CuW8#(=% YL S8S(#+4$wQh j=!"!}#= <BCÂ% 0#-12#$I6?/156 17zB$C!i$$ x!"(/415617!"zB$ #<!i$h./%d156 R=./<BCÂ% / 0 < = [\ =%] E"E[^LR] /]A;<u<}##< 0#-12#$I6?/%d 15617&$$x#3/ R [...]... Hớng dẫn về nhà: -V nh lm li tp 6 (SBT) Ngy ging: 09 / 09 / 20 09 Tiết7: S PH THUC CA IN TR VO CHIU DI DY DN IMC TIấU: 1 Kin thc: -Nờu c in tr ca dõy dn ph thuc vo chiu di, tit din v vt liu lm dõy dn - Nờu c cỏch xỏc nh s ph thuc ca in tr vo 1 trong cỏc yu t (chiu di, tit din, vt liu lm dõy dn) 19 - Mụ t v tin hnh dcTN kim tra s ph thuc ca in tr dõy dn vo chiu di -Nờu c in tr ca cỏc dõy dn cú cựng tit... kt: in tr ca cỏc dõy dn cú cựng chiu di v c lm cựng t 1 loi vt liu thỡ t l nghch vi tit din ca dõy 2 Hng dn nh: -Tr li C6 v bi tp 8 SBT -ễn li bi ca tit 7 v tit 8 Ngy ging Tit 9: S PH THUC CA IN TR VO VT LIU LM DY DN I.MC TIấU: 1 Kin thc: -B trớ v tin hnh TN kim tra chng t rng in tr ca cỏc dõy dn cú cựng chiu di, tit din v c lm t cỏc vt liu khỏc nhau thỡ khỏc nhau -So sỏnh c mc dn in ca cỏc cht... C4in tr ca dõy ng in tr ca dõy ng l 0,087 trong mch in l rt nh, vỡ vy ngi ta thng b qua in tr ca dõy ni trong mch in *Tng kt-Hng dn v nh 1 Tng kt:- in tr sut ca vt liu cng nh thỡ vt ú dn in cng tt -in tr ca dõy dn t l thun vi chiu di ca dõy dn, t l nghch vi tit din ca dõy dn v ph thuc vo vt liu lm õy dn 2Hng dn v nh: -c phn Cú th em cha bit -Tr li cõu C5, C6 (SGK-tr.27) v lm bi tp 9 (SBT) 29 Ngy ging:... - Mc tiờu: HS nhn bit c in tr sut l gỡ? n v ca iờn tr sut - Cỏch tin hnh: II in tr sut-Cụng thc in -Yờu cu HS c mc 1 v tr li tr cõu hi: 1.in tr sut +in tr sut ca mt vt liu -in tr sut ca mt vt liu (hay 1 cht) l gỡ? (hay mt cht) cú tr s bng in +Kớ hiu ca in tr sut? tr ca mt on dõy dn hỡnh tr +n v in tr sut? c lm bng vt liu ú cú chiu -GV treo bng in tr sut ca di 1m v cú tit din l 1m 2 mt s cht 20 0... xỏc nh s ph thuc ca in gia in tr vo chiu di dõy tr dõy dn vo chiu di ca dõy ta dn thỡ phi o in tr ca dõy phi o in tr ca cỏc dõy dn c dn nh th no? lm t cựng mt loi vt liu, cú tit din nh nhau nhng chiu di khỏc nhau -Gi HS nhn xột cõu tr li ca bn, GV sa cha nu cnỏnh giỏ cho im HS V: in tr ca mt dõy dn ph thuc nh th no vo tit din dõyBi mi 3.Dạy học bài mới: Hoạt động1:NấU D ON V S PH THUC CA IN TR VO TIT... oỏn v s ph thuc ca in tr vo tit din ca dõy - Cỏch tin hnh: -Yờu cu HS vn dng kin thc I.D oỏn s ph thuc ca in tr vo v in tr tng ng trong tit din dõy dn on mch mc song song tr R R C1: R2 = ; R3 = li cõu hi C1 2 3 -T cõu hi C1D oỏn s ph C2: Trng hp hai dõy dn cú thuc ca R vo S qua cõu 2 cựng chiu di v cựng c lm t cựng mt loi vt liu, thỡ in tr ca chỳng t l nghch vi tit din dõy Kt lun: in tr ca dõy dn cú... 27 -Yờu cu HS tr li C1 I.S ph thuc ca in tr vo vt liu lm dõy dn C1: o in tr ca cỏc dõy dn cú cựng chiu di v cựng tit din nhng lm bng cỏc vt liu khỏc nhau 1.Thớ nghim -Yờu cu thc hin TN theo nhúm A Cỏc bc tớnh 1 2 V + - Dõy dn cú cỏc in tr sut khỏc nhau( ) in tr dõy dn( ) l1 = l2 = 1800m S1 = S2 = 0.07065mm 2 R1 = = 1.8m = 0.07065.106 m 2 R2 = 2.Kt lun: in tr ca dõy dn ph thuc vo vt liu lm dõy dn Gi... -Yờu cu a ra phng ỏn TN tng quỏt tit din, cht liu lm dõy dn cú th kim tra s ph thuc ca in tr vo 1 trong 3 yu t ca bn thõn dõy dn Hoạt động2: XC NH S PH THUC CA IN TR VO CHIU DI DY DN - Mc tiờu:- Hs thy c s ph thuc ca in tr vo chiu di dõy dn - dựng: 1 ngun in 3V và 1 cụng tc -1 ampe k cú GH l 1A 1 vụn k cú GH l 6V -3 in tr: S1=S2=S3 cựng loi vt liu l1 =90 0mm; l2=1800mm; l3=2700mm 21 -Cỏc in tr cú =0,3mm... cỏc on dõy dn I.Xỏc nh s ph thuc ca in tr dõy hỡnh 7.1 cho bit chỳng khỏc nhau yu dn vo mt trong nhng yu t khỏc t no? in tr ca cỏc dõy dn ny liu nhau cú nh nhau khụng? -Hỡnh 7.1: Cỏc dõy dn khỏc nhau: Yu t no cú th gõy nh hng n +Chiu di dõy tr ca dõy dn +Tit din dõy -Yờu cu tho lun nhúm ra phng +Cht liu lm dõy dn ỏn kim tra s ph thuc ca in tr dõy * Kt lun: in tr ca dõy d ph dn vo chiu di dõy dn thuc... NG DY HC 1 n nh t chc: 2 Khi ng: - Mc tiờu:- Kim tra li kin thc c, to tỡnh hung hc tp - Thi gian: 7phỳt - Cỏch tin hnh: 1 in tr ca dõy dn ph thuc vo nhng yu t no? Ph thuc nh th no? Vit cụng thc biu din s ph thuc ú 1.in tr ca dõy dn t l thun vi chiu di l ca dõy, t l nghch vi tit din S ca dõy dn v ph thuc vo vt liu lm dõy dn l Trong ú: R l in tr S ca dõy dn (); l in tr R = sut (m); l l chiu di dõy . $YL 89) K;%I$!"#' %H!M&@/%+J& $%&'(')*&+,-.,/*0,-*123 4153/('67)*8/ *9: ;;<';&=,- %:>?,-%12, @9& apos;>AB>C,DEF*1 29. =1>?/#4f' =%=1> J/*KL1 59 >1M,67)*8/ *9: ; ;<';&=,-%:>?,-%12,DEF*1 29 %12,/*G UI#;< 