ࡱ> 8:7#` 0bjbj."2ZZZZn42v$,h80NNN:NNN P>ZF9F0v,D$ND v222$V 222V 222 5. What is Electron ? An electric current is a flow of microscopic particles called ELECTRONS flowing through wires and electronic components. It can be likened to the flow of water through pipes and radiators . As water is pushed through pipes by a pump, electric current is pushed through wires by a battery. Hot water does work by heating radiators. Electric current does work by lighting lamps, ringing bells and running washing machine. An electron has a negative charge. The negative (-ve) terminal of a battery will push negative electrons along a wire. The positive (+ve) terminal of a battery will attract negative electrons along a wire. Electric current will therefore flow from the ve negative terminal of a battery, through the lamp, to the +ve positive terminal. An electric current is defined as the flow of free electrons through a conductor. Because current can be both measured and controlled, it is considered as important source of energy in the modern world. microscopic particlesheatingelectronic componentsmeasuredPipescontrolledPumpmodern world INCLUDEPICTURE "electric%20current_files/circuit.gif" \* MERGEFORMATINET  Exercise 5.1 By using English / Arabic dictionary try to Arabic meaning of the ambiguous words: 5.2 Complete the following sentences with suitable words: An electric current is a flow of microscopic particles called___________. Electric current does work by___________ bells and __________ lamps. Define Electric current. 5.3 Translate the following text into Arabic: An electric current is defined as the flow of free electrons through a conductor. Because current can be both measured and controlled, it is considered as important source of energy in the modern world. Zc  ! + 5 > J N O 8 ɴqqWqCC&h97hu5CJOJQJ\^JaJ2jDh97huB*CJOJQJU^JaJph2jh97huB*CJOJQJU^JaJph h97huCJOJQJ^JaJ/h97hu5B*CJOJQJ\^JaJph)h97huB*CJOJQJ^JaJph!h97huB*OJQJ^Jph!hu5B*OJQJ\^Jph'h97hu5B*OJQJ\^Jph  $dd$A$If[$\$gdul $A$a$gdu $A$a$gdu$A$gdu     " # [>>>>$dd$A$If[$\$gdulkd$$Ifl\ ,"D $ p t0644 laytu# $ * + 6 7 [>>>>$dd$A$If[$\$gdulkd$$Ifl\ ,"D $ p t0644 laytu7 8 = > K L [>>>>$dd$A$If[$\$gdulkd"$$Ifl\ ,"D $ p t0644 laytuL M N [L<44$A$gdu$ddA$[$\$a$gdu$ddA$[$\$gdukd$$Ifl\ ,"D $ p t0644 laytu 7 8 $ $hA$^hgdu$ & FA$gdu$A$gdu ƵhQcT h97huCJOJQJ^JaJ)h97huB*CJOJQJ^JaJph h97huCJOJQJ^JaJ&h97hu5CJOJQJ\^JaJ ,1h/ =!"#$% $$If!vh55 55 5Y#v5 #v#v #vY:Vl t65D 55$ 5pytu$$If!vh55 55 5Y#v5 #v#v #vY:Vl t65D 55$ 5pytu$$If!vh55 55 5Y#v5 #v#v #vY:Vl t65D 55$ 5pytu$$If!vh55 55 5Y#v5 #v#v #vY:Vl t65D 55$ 5pytu Ddg ((T  S 0Acircuitb> .;oJ)0$FL] Xn .;oJ)0$FL]PNG  IHDR)PLTE@@@Ȥ@@@𠠤:tRNSS%bKGDH cmPPJCmp0712HsIDATx^ݶ* {wq>UP`B"Mg|v^ffV*#ePiJ"U?hWk곿7}C CEIȳ^sHawۦI*KSV؜1g@eZZ:IImMnRFwLJj}yqp F jJ`E;ٌ&F -#ePiHP;ӔB v*4vWHB v)#@LSF %ڙ#%:}&6/(+ɚۤ8䥁B/tM娴HɇޗdRߔ !PNJ&*)%dHj IURj@IgT*ngYQ(%D*V m]6,Z!j-ާ '$,h=<Ցfʦz.)Maܗp_)_+Մ'苜N\T'QJ=Ơ0)(dID%JHJjOYGvv(w)8Tj;J?A*u`EI2k{W$)MEh}_4$%Mi:޹\@R }}eA exF jJ3M)jg2R(NLShĴ~ZT MFJr4@gT〪B뾸h VК}'\Vkl玃l}Zn0>U mo# N/?{fCPl4nnﻕnaBԒl6(;d K}6R%RE_jH43RF %ڙJ3M)jg2R(4eP]Z >MLYM#HvshYd?NL%u);{,{N"E*T^ɤniэR>T=Mc&uGJmVF'91u{ ә`8bshHIkr܂elXDzz\T7y gMf ()2nFH [[!8ҭ6%>Rot0V)SREaRd`=D;>zHZkprTc z(ٶqDHjZ!?eYAjEA شP'83#(Sr Pjj" 8k2_=OɪJ % !X#=NTH%+"Y#bFT'Ķ,*[%C8BjD,:mW3KΔU]V  U_:L7b[qn6u|]ckU<(? 63@֔6z瞱Vcjsh[LT/T0@UrE<= x}:շ?m.+/pN|GVAE{uEYǀT #Us cON0JG @ԞT]:EuMPOj$RҢz}1J 깨bBS\QH @/w$,zP"ԣo=GK)JF;XSI7-N$eI"HM<֔SfJ&"M%Am!\g3\hMEHJ͑X9h+ SHFL&-)H}>OyD DGӟ,R _9yI!Nؼ;FO)?NX)Z_8W,O^i>GJKntao-6 #UC#x_hE<4Q|~"G% [qdmHZ3TCH& H6CMJm/!eH*o}~ӓ~JR!(d˃ 2| !3)~\{#2R(4ePiHP;ӔB v,|;wĠYHvLAr T|i>2VPHqW&;kcuwRW2RN(<ĥ|Nlz*@sn01={{,]>%v8(!L]yO{=J=(-BW]#p,,PF %?' "IENDB`J`J u9'/J$A$CJ_HaJmH sH tH >A> .7 'DAB1) 'D'A*1'6JLi@L  ,/HD 9'/J4 l4a ,k, (D' B'&E)v`v u 4(C) ,/HD7:V0$A$""#$*+678=>KLMN780000000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000000 00 0 0@0*@0*@0*@0*I00"#$*+678=>KLMN78@0(@0(@0(@0(@0(@0( @0( @0( @0( @0( @0( @0( @0( @0( @0( @0( @0( @0( @0( @0( @0( @0( @0(@0(@0( @0(@0(@0(@0(@0(@0(@ 0(@0(@ 0(@ 0(@0(@0(@0(@0( 00  # 7 L   NCIK 33333Rj^`o(. ^`hH. pLp^p`LhH. @ @ ^@ `hH. ^`hH. L^`LhH. ^`hH. ^`hH. PLP^P`LhH.R          P!QcTu"#$*+678=>KLM3@0P@UnknownGz Times New Roman5Symbol3& z Arial"qhFF  !242qHX)?u25aliali Oh+'0`   ( 4@HPX5aliNormalali1Microsoft Office Word@@B>@B>՜.+,0 hp|  www  5   !"#$%&()*+,-.01234569Root Entry F Q>;Data *1TableWordDocument."SummaryInformation('DocumentSummaryInformation8/CompObjn  F Microsoft Office Word MSWordDocWord.Document.89q