电功试题综合

电功试题综合

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时间:2023-07-19

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31

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36'ᔁᵫEFGHIᡂKLM᪥OPQᵨ>ᫀRSTὃ஺V⚪ᑖ᪆"A⌱⚗AஹBὶ[\]^Ḅᵯ_79⌱⚗┯a஺U2VU2VB⌱⚗ᵫbcd,AḄfA௃=—i=——=5Q,BḄfRp="==10஺*/0.4AB10.2AAH⌱⚗┯a஺C⌱⚗ᵫὶᑖrAஹBᵯḄsᵯrt31"2,⌱⚗vw஺I)⌱⚗ᵫᵯ᳛Ḅ+,P=,AஹBᵯḄᵯ᳛t31:2,⌱⚗┯a஺vwḄ⌱|3C»ὃ!"ὶᵯḄᵯ_ᵯrᱯ!ᵯ᳛24.Aூ;᪆௃(1)ᵬஹὶPᙠᵯr3VḄᵯsᡠᵯᵯrU=3V%(2)ᵫbdᑮᵯr3V,ᵬᵯḄᵯ_1*0.3A,ᵯḄᵯ_I=0.6A,᪷ὶᵯᵯ_Ḅᱯ!ᵯᵯ_1=1>iI+I=0.3A+0.6A=0.9A(3)ᵯὑḄ᳛P=UI=3VX0.9A=2.7W.25.Aூ;᪆௃AஹᵯᨩᵫḄ▭᳛Iᓄ¡Ḅ᪷P=U2R,ᵯ¢▭᳛ᓄ3ᨵ▭ᵯrᓄ¡Ḅ.¤ᔠ⚪¦.Bஹ§¨ᵨᵯᘤwª᳛w«¬ᵨᵯᘤ3ᔲ®¯3ᔲv°®¯±¢²³ª᳛.¢¤ᔠ⚪¦.Cஹ§¨ᵨᵯᘤwªᵯrw«¬ᵨᵯᘤ3ᔲ®¯3ᔲv°®¯±¢²³ªᵯr.¢¤ᔠ⚪¦.Dஹµ¶·*ᵯ¢¸ᐝ.¢¤ᔠ⚪¦.ᦑ⌱A.26.Cூ;᪆௃ὶᵯᵯ_79OºRA=RC,᪷ᯖὡ஺=,ᵯ79½79,Q=l2Rt=cmkt,AC7t¾¿79᯼ÁḄt½ÂÃÄÅᓣÇÈÉÊËÄÌÈ79ᡠT>TA.A.B¶ÏÐÑḄ3Òt½Â79Ó3BḄᵯÃ᪷cQ=I~Rt=cm\t,ᵯ_79¾¿79[ᵯÔ9ᵯÃḄÈÉᓣÇḄÕᨵÄÌÈ79ᡠTA>TB27.ATJ2Vூ;᪆௃×ØᱏᙠÐ!ØHᘤᐭᵯḄf"R=-=^-=10Q"I0.2Aᵯᵯr"U=IRs=0.2Ax(20Q+10Q)=6V"×ØᱏߺØHᘤḄᨬásØHᘤᐭᵯḄf20Q,âὶãᵯḄf79ÄÅᵯr⊤åᦪ3V.ᦑ⌱A.28.40ூ;᪆௃(1)èÃḄU-Ibé×ᵯ᳛2WUL=4V,I=0.5A,Lᵯᵯr"U=U=4VL>ᫀ@5⚓41⚓

37'ᔁᵫEFGHIᡂKLM᪥OPQᵨ>ᫀRSTὃ஺ê2ᔠëᐵSiPLâᵯRὶᵫὶᵯᱯ!_\ᵯRḄᵯ_IR=I-I=0.6A-0.5A=0.1A,ALᵯRḄfR=U/I=4V/0.1A=40QRᦑ>ᫀ"40.29.Dூ&᪆௃V⚪ᑖ᪆:ᨵᙠªᵯr쮯ᵬḄ▭᳛ᑖí325w100w஺îᐭ:L10VᵯÐᵯr3ªᵯrḄ§ïᵯ_3ªᵯ_Ḅ§ï]Ḅ▭᳛3ª᳛Ḅðᑖ§ᡠ]Ḅ▭᳛25W%¨ḄὑᵯñḄᜧÃóḄ᳛[ᵯÔᨵᐵ஺ᙳv°ᐝ᪷+,P=U2/R-᳛ᵯᡂõtᵬḄª᳛Ãᵬöᵯ÷ᜧ஺A,ᵬḄ▭᳛§325W¢ᔠ⚪¦%B.îᐭ110VᵯÐ]Ḅ▭᳛50W¢ᔠ⚪¦%C.ᙳv°ᐝὑḄᵯñ÷Ê¢ᔠ⚪¦%D.ᙳv°ᐝᵬöᵯ÷ᜧ¤ᔠ⚪¦%ᦑ⌱D஺ὃ!:'V⚪ὃ)Ḅ3ᵯ᳛Ḅø.!&"OºÅùV⚪úIûüýḄ᳛ø஺ᨵᙠªᵯr쮯▭᳛þ9ºª᳛஺ᙳv°ᐝ᪷+,P=U2/R.᳛ᵯᡂõtᵬḄª᳛Ãᵬöᵯ÷ᜧ஺30.Bூ&᪆௃V⚪ᑖ᪆"ὶᵯ¡ᑖr¯ᵨᵨᵯᘤᨵᙠªᵯrìþñv°®¯%ὶᙠᵯTJ2Ðᵯ_§79ᐜ᪷R=Ḅᵯᯠ᪷P=YRᑨḄ.PḄᵯ12V,ᙠᵯᵯ12VḄᵯ!"ᑣᑖ%Ḅᵯ&'12V,ᦑ)*+,-ᐝ/LiḄᵯ0&=12Q/L2Ḅᵯ0R=24Q/2VIj=l2,R1VR2,ᵫP=FR3%,Pi᳛Ḅ@A.U29B0C⚪ὃ;Dὶᵯ!ᵯFஹᵯᱯ9ᐵJᵯ>᳛KLḄᮣNOPᓽR=ஹPP=I2R.31.Cூ&᪆௃,U2R⚪ᑖ᪆0C⚪Tᵯᵯ!ᦑᵯ>>᳛KLP=I*=UIU,ᙠV⚪WᮣN⌱XRYᫀ[6⚓]41⚓

38Cᔁᵫ_`abcᡂefg᪥ijᵨYᫀlmnὃ஺ᓽ3.ᵫP=UI%0P=4UX1I=UI,ᓽ]>᳛)O.ᵯF⊤xᦪOzᩭḄ1,ᵯ|44)Oᑣ3ᵫ}=1~1%0Pi=1Ri,ᓽRὑḄ>᳛O&.]>᳛)Oᑣ16Rz5ὑḄ>᳛Oᜧ.ᦑAஹBஹDᙳ┯஺ᦑ⌱C஺ὃ90ᵯ>᳛Ḅ@AஹᵯḄὶ32.Aூ&᪆௃R⚪ᑖ᪆0ᵨᩞᧇᑴᡂḄ☢ḄᵯḄᵬᜧᡠḄᵯᜧ'ᵬḄᵯ.¡¢£ὶᙠᵯ!"WᵯᵫKLP=U7R3¤ᵯ¥ᜧḄᵯ>᳛¦¥&§ᵯ¥&Ḅᵯ>᳛¦¥ᜧᦑᵬḄ<▭>᳛6ᜧ.ᦑ⌱A.ὃ90ᵯ>᳛33.Bூ&᪆௃R⚪ᑖ᪆0¨1©᪷⊤"ᦪªᵯ«i¬ḄᵯFR=,®%ᵯ¯ᵯOᓄḄᐵ_£ᑨ±²ḄᵯF«¡³Ḅᵯᔲᡂ+/¨2©ᙠᵯµḄ>᳛>᳛ᵫ⊤"ᦪªᵯi¬ḄᵯFᯠᵫKLP=UIḄ>᳛/Aஹᵫ⊤"ᦪ3¤¯ᵯUḄ¶ᜧR=⌲¸Oᜧᓽᵯ¯ᵯ¶ᜧ®¶ᜧᦑA┯¹/Bஹᵫ⊤"ᦪ¤ᵯU=2.5Vi¬ḄᵯFI=0.32A,Ḅ>᳛P=UI=2.5VX0.32A=0.8W,ᦑB+¿/CஹᙠᵯµḄ>᳛>᳛)*ÀÁÂ>᳛ḄÃᙳ|ÄḄ>᳛ᦑC┯¹/DஹᵫA¤ᵯR¯ᵯUḄ¶ᜧ®¶ᜧ)|ᵫ1=¤0±²&ḄᵯF«¡³Ḅᵯ)ᡂ+ᦑD┯¹/ὃ90ÅÆᵨᵯᘤḄᵯ>᳛<È9B0C⚪ὃ;D<ÈᦪḄᑖ᪆Ḅ>᳛ஹᑨᵯ«ᵯFÉḄᐵ_¬¤⍝>᳛ᙠᵯµḄ>᳛)*Àᙠ)ᵯµḄ<▭>᳛ḄÃᙳ|Ä>᳛.34.Bூ&᪆௃U2R⚪ᑖ᪆0&ஹR2£ὶWᵯ³ḄᵯÌ᪷>᳛Ḅᜧ&ÍA=——¿ᵯPÏÉḄᐵ_ᑭᵨÑÒÓ±²R2ḄᵯF/3Ô2£ὶᙠᵯÕUḄᵯ5W᪷ᵯḄὶᱯ9ÍÑÒÓᵯ!"ḄᵯF,2᪷U=IR³ḄᵯᑭᵨP=UIR2ὑḄ>᳛ÍᵯὑḄ]>᳛.U2U1&ஹR2£ὶWᑣ³ḄᵯÌU,&ὑḄ>᳛ᱏ=ߟᡠ«=]_R2ὑḄRஹYᫀ[7⚓]41⚓

39Cᔁᵫ_`abcᡂefg᪥ijᵨYᫀlmnὃ஺uUU>᳛2Pl=J/ᡠR,=±²ḄᵯF2=*-/ᡠRI=2R2#&ஹR2£ὶᙠᵯR2PlR223oßUàUḄᵯ5W±²RḄᵯFU'=I=——=*-<ᦑC⌱⚗)+¿/Ri³22Rj+/?->2ãḄᵯU.=IR.=-x2R.=U,ᦑA⌱⚗)+¿/R2ὑḄ>᳛2R?3UU2U2\p,=UI=(-t/-t/)x——=——=——=-P.,ᦑB⌱⚗+¿/ᵯὑḄ]>᳛222221ã4ã2/?,23U3U3p=U,,I=-t/x—=-=-P.,ᦑD⌱⚗)+¿.஺22&4R212ᦑ⌱Bὃ90⚪ὃ;Ḅᵯ>᳛Ḅ@A஺9B0C⚪ὃ;Dὶᵯ!Í£ὶᵯ!Ḅᱯ9äÑÒÓᵯ>᳛KLḄ@AᐵJKLäᐸOPLḄᮣNæᵨ.35.Aூè᪆௃R⚪ᑖ᪆0ᵫ'ᵯὶᡠ±²ᵯḄᵯFᙠ±ᵯWÉᑁ᪷KLQ=ìRt,ᑣîcḄïðÏÌ'ᵯÏ203.ὃ90ᯖὡÓ9B0èóC⚪ḄᐵJ+¿ᳮèஹ£ὶᵯ!ᑖஹᑖF«ᵯ|ᜧ&Ḅᐵ_ὃ;DõcḄöᔠᑖ᪆*øÕ⍝öᔠឋ6úḄ⚪û37.Dூè᪆௃R⚪ᑖ᪆0᝞þᡠxᵬþὶᵯ!þ£ὶᵯ!/ὶᵯ!"ᵨᵯᘤÿLLᰐAὶᵯᔜᵨᵯᘤLLzᰐCᙠᵬᵯ$%ὶ&'()*+ᵯ,-ᜧ,᪷1/=",ᵯᵯ67(᪷18=8/?,:)*Ḅᵯ,<ᵯ6<(ᡠ>?▭RᵯA᳛<(ᡠ>LCL<ᨩBᙠFGὶ&'()*LCLz:ᩩI:U2JᵯK<ᵯ,<᪷1P=,?▭ᵯA᳛<ᡠ>)*ḄMN<⌱1)஺RὃTU%ὶᵯᱯTஹὶᵯḄᱯTஹ?▭ᵯA᳛TXUYZ[⚪Ḅᐵ^_`a%ὶᵯḄᵯ6ᱯT>ba⍝Zd)*Meᗗ_?▭ᵯA᳛஺38.BூY᪆௃mᫀo8⚓+41⚓

40[ᔁᵫstuvwᡂyz{᪥}~ᵨmᫀὃ஺⚪ᑖ᪆Uᵨᵯᘤ:JᵯKᦋ<ᐸ?▭A᳛<ᓄ⌕~?▭A᳛<ᦋU2<ᵨᵯᘤḄᵯ,஺ᵫA᳛Ḅ<8=஺/=&ᵯKᩭ-A᳛ᵯ,<ᩭḄᑖ&஺ὃTU?▭A᳛Ḅ39.Bூ&᪆௃⚪ᑖ᪆UᵫᵯḄW=PtaU⌕¬⁚⌕®7(ᵨᵯᘤḄA᳛⌕®7¯°஺A.)*ᣚᡂA᳛(&²Ḅ⁚ᵯḄᳮᵫ_U)*ḄA᳛§(´Ḅ°ᑁ¶ὑḄᵯ§¯ᙠ¸¹Ḅº»¼½ᑮ⁚ᵯḄ¿Ḅ⌱⚗Aᔠ⚪Â஺B.C.ÃÄ)ᣚᡂ⁚)⁚ᵯḄᳮᵫ_U⁚)ḄÅᐝᦔ᳛ÈÉᜫḄᵯ¯⌕Ëᑮ´ḄMN¶ὑḄA᳛(ᦑ½ᑮḕᵯḄ¿Ḅ⌱⚗BCᔠ⚪Â஺D.ᐝÎᨩÏÐÑ⁚ᵯḄᳮÒ_U7¯ᵨᵯ°ËᑮḕᵯḄ¿Ḅ஺⌱⚗Dᔠ⚪Â஺ὃTU⁚ÓÔᵯḄ40.Dூ&᪆௃ᵯAW=UltᵯAḄÕÖ_×'ᡠ>ABCØ}D}஺41.Cூ&᪆௃⚪ᑖ᪆UÙGÚ¼a)*:JḄᵯK4V;ÜÝÞḄᵯ60.4A,ᑣ)*Ḅ?U2(4V)2▭A᳛2=U4=4Vx0.4A=1.6W,ᵯ,¶ὑḄA᳛஻=——=-&L=1W,ᡠR16Q>᦮'ᵯḄ+A᳛1.6W+XW=2.6WὃTUᵯA᳛Ḅ42.Aூ&᪆௃AஹᎷ᝞åḄæçè<ᩭḄ0.1éæêëCṺíḄæçèî(ᙠ´᪵ð纻ñN<ᓄîᜧᡠ>òóᔠᳮ.BஹᎷ᝞ôõØ<öôõ÷)øùᨵᵯ,ᡠ>ÅçúÅᐝ.ᡠ>òóᔠᳮCஹ1AḄᳮ¼a~ᵨûüýþØḕAᦑ┯DஹḄᐵᎷ᝞ᨵᜧᓽᯠḄᦑ┯!.43.Dூ&᪆௃Aஹ#ᐵ$ᙠ&'()*ᙠ+,ᵯ./ᑗ1ᵯ.23456ᕒḄ$ᐰ9Bஹ:#ᐵ($;<ᵯ2=ᘤ)*ᙠᵯ.?@<ᵯ/Aᑗ1ᵯ.■CDᵯ9CஹᨵEF᜜HḄᵨᵯᘤJᵨK'LᜮKNLOPQRSTᓽJᑁV'.ὁᓄYZ᜜H[ᵯ\Yᐭᜧᙢ_J6Dᵯ?@ᓻ◅9Dஹ*bcdeḄfᵨᵯᘤgᵯJᵨLOh$ᐰᵨᵯiᐵ.ᦑ⌱D.44.Dூ&᪆௃kᫀm9⚓:41⚓

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43AᔁᵫDEFGHᡂIJK᪥Mᵨ<ᫀOPQὃ஺2R.(R+r)?STUVὑḄ7᳛'XPo/P2=(I-R)/(L'r)UY4RrR+r(R+r)-4Rr=(R-r)2>0,ᡠPo/Pz>l,ᓽPz

44ᔁᵫᡂ᪥ᵨᫀ!"ὃ஺54.4400(3.6X105ூ.᪆௃1⚪ᑖ᪆4567Ḅᵯ9⊤ᡠ9<=Ḅᨬᜧ@᳛BP=UI=220Vx20A=4400W,600Revs/kw,h⊤LMNὑIkw.hᵯ9QRQ600QSTQRQ60QNὑḄᵯ9B:60rV==0.1kW/?=3.6x105J600r/kW-hὃX4ᵯ955.36V(72Q.ூ.᪆௃1⚪ᑖ᪆4]^_`ḄᵯaB4U=W/It=180J/(0.5AX10s)=36V(]^ḄᵯjB4R=U/I=36V/0.5A=72Q:]^ᵯjḄᜧ5k_`Ḅᵯalᐵn]^_`ḄᵯaBop]^ḄᵯjqB72Q.ὃX4rstuḄvᵨ(ᵯj(ᵯ@Ḅwx56.yzᙠ|tᵯa}1sᑁ⌕Nὑ1JḄᵯ9(10(a.ூ.᪆௃(1)yLḄ|t@᳛B1ᓽP=lW=lJ/s,⊤LḄ4yzᙠ|tᵯa}1sᑁ⌕NὑUḄᵯ9.yLᙠ|t@᳛}10s,ᑣᵯyLḄ@BPt=lWX10s=10J.⌕yLḄ▭@᳛ᜧyzḄj᪷P=1Rᑣᵯᵯ◤ᜧᵫrstuᵯḄᵯj◤5ᑣjᘤḄᱏᔣa`¢.57.£ὶ(10(0.225.ூ.᪆௃1⚪ᑖ᪆4(1)᝞¦ᡠLḄ§¨©ªᵯ«ᨵᩩ¯ᦑ_yḄ©ª§±£ὶ((2)²U|=2.2V,I|=0.22A,᪷rstu:RL=U«/I«=2.2V/0.22A=10Q.(3)²ᵯ³ᵯaU=3V,_´µ¶Ḅyz£ὶ©ª(᪷£ὶᵯḄᱯXM´yz_`ᵯaµ¸¹µº»ᵯ³ᵯaᓽ4U^1/2XU=1/X3V=1.5V,ᑣyzḄ▭@᳛PL(1.5¼=0.225W.RL10QὃX4rstuḄvᵨ(▭@᳛.58.(1)60((2)2200(36((3)180W(ᵯ½¾ூ.᪆௃¿67ᨴvÁᵯÂ0.5ᐗ/kWh(931.6kWh-811.6kWh)=60ᐗ஺¿67¶ÆᵨḄᵨᵯᘤ@᳛ÇÈ220v*10A=2200W.ÊËᵨᵯᘤᓫÌpÍÎᵯ9⊤2minÒQ15ᙌnᵨᵯᘤNὑḄᵯ915r/2500r/KWh=0.006KWh஺Ö´ᵨᵯᘤḄᵯ@᳛0.006KWh/l/30h=180W.×9ᵯ½¾.59.624Ø60ூ.᪆௃ὃX4ᵯ@᳛£¸ὶᵯᑖ᪆45yzkjᘤB£ὶᵯ5yzÙjᘤᵯaÚÙ»ᵯ³ᵯa18v,p3wᵯµ஺5yzÛÜÍᐝᵯaB|tᵯa6V,ᵯB|tᵯ/=Þ="=0.54,U6nàpjᘤᵯau=18—6=12vᵯ»yzᵯ0.5A,ᡠáU2p=U/=12vxO.54=6w஺yzᵯj/?==12஺ᵯ9ÇÈyz|tᵯã9ÇPᫀ13⚓41⚓

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46CᔁᵫÂóᡂÅÆÇ᪥D·ÉᵨºᫀÊËÌὃ஺2²³TᘤjὑḄᵯ᳛:P=/R=(ߟ^-)ᓤ=Î^~ÑÒ+R(12Q+R)2ÔÕJ2R=12QPᨬ«ᵫK²³TᘤᨬᜧÖ#12஺,ᙠ²³TᘤᐭᵯEḄÖ×ᜧḄØ,PÙÚª«pᦑºᫀ#:Ωª«.9B:C⚪ὃᵯ'<Ḅ)ᵫU?)=U@-LUt,ᵯ⊤<'Aᙠ;Ḅ)8'Aᙠᘤ஺(3)ḄB▭D᳛:PB=UI=1VXO.2A=0.2W.GᵯIV;HḄᵯ,⌕K;LᑮD᳛)ᑣ;Ḅᵯ⌕Lᑮ2.5V,ᓽ⌕KᵯPᜧ)᪷R(ὶᵯ%ᑖḄᐵT)UVᘤḄᵯW⌕X;)ᦑᘤᵯ⌕;)GZ[ᘤḄᱏPᔣa^)_ᑮᵯ⊤Ḅ9ᦪ2.5V஺ᵫ`)ᵯ3⊤ᡠAḄ!"0~0.6A,ᑖab0.02A,ᦑᵯ3⊤Ḅ9ᦪ0.22A,ḄD᳛P»=UcI=2.5VX0.22A=0.55dὃfᵯD᳛Ḅghஹᵯ3⊤Ḅjᦪklஹᵯ⊤ḄKᵨஹ567Ḅ[ᵨ67.11.7Q5.4Wூ&᪆௃P6W⚪ᑖ᪆opqᐝ,Ḅᵯ3/=±="=1AḄᵯU6Vwᫀy15⚓)@41⚓

47{ᔁᵫT}~ᡂ)᪥Kᵨ)wᫀὃ஺R=U=6V-=6஺)ᐕᵯ3⊤Ḅᨬᜧᵯ30.6A,ᡠᘤAᐭᵯ%2P6WḄb;)ᵯ%2Ḅᵯ3ᜧ)ᘤAᐭᵯ%2Ḅᨬ;,)ᵯ%2ᵯ30.6A,᪷Rᵯ3ᵯᓄᐵTᵯ%2Ḅᵯ30.6A,)ᵯ2V,ᘤḄᵯUFU-U=9V-2V=7V,ᘤAᐭᵯ%2Ḅᨬ;bRU7VR=1==11.7Q;Z,ᵯ%¤ὑḄ@D᳛P@=UI=9VX0.6A=5.4WI0.6Aὃf567ᵯD᳛68.48ூ®᪆௃⚪ᑖ᪆°ᔠ²ᐵS,ᘤḄᱏ^´ᨬµᓽbᨬᜧᜐ,)·ᦔᵯ%`᝞º`ᡠ9°ᔠ²ᐵS,ᘤḄᱏ^´ᨬºᓽᐸ¼ᐭᵯ%2Ḅᵯ0,)·ᦔᵯ%`᝞µ`ᡠ9᪷RP=½R,Z,ᵯ%2Ḅᵯ3/=¾=LM=0.25A.ᙠµ`Á᝱Ã,\RV24QLp6W;opqᐝ)Z,ᵯ%2Ḅᵯ3ூ2==——=0.5A,U,U=32,2U12V2LU./](/?[+R9)0.25A3.#01+g+mÌ*=~=x2=)®ÑR=ᵯ>Ḅᵯ<)U=ITiUI?R\0.5A&22-2(RI+R+RL)=I(RI+RL),ᓽ0.25AX(Ri+Rz+24Q)=0.5AX(L+24Q),0.25A22X(IH,+Rz+24Q)=0.5AX(1H,+24c),®ÑR?=48Q.222-ὃf567Ḅ[ᵨ×(ὶᵯ%Ḅᵯ3Ø7×ᵯḄ(ὶ×ᵯD᳛Ḅgh69.(1)`ᶍ(2)µ(3)0.50.7ூ®᪆௃1G;Ḅᵯ2.5V,ᡠᵯ⊤Ḅ!"⌱Û3Vᡈὅ15VÞß)¼A᝞Ã`ᡠ9×wᫀy16⚓)@41⚓

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50NᔁᵫQRSTᡂVWX᪥Z[\ᵨIᫀ^_`ὃ஺ὃ./ᵯ᳛Ḅ«s..¶/N⚪ὃ·¸01¹º»⚗ஹgB0ᱥᵯ78ஹᵯ7ᦑᑖ᪆ஹᵯ⊤ᦪ¾¿⚪01Ḅmὃ¿⚪À⌕ÁÂ.Zᵯ⊤ᦪA⌕ᐜqstᑖᯠ[ÅᦪᦪAÆG⌕ᵯ⊤ÇGᚖÉ.72.(1)RËR(2)ᜩÍ\ÎḄÏsЫÑÒÏsÓ¾(3)Aூ᪆௃(1)ᙠÖ×ØᜫḄÚÛCᵯpÜÝᵯAËTḄ×sᐰßÑÒᔾᦈ⌕\ÎâЫÑÒᔾᦈÓ@×sᑣ◤⌕EᵯäÓ¾Ḅ×såᵯὶᵯpÓ@ÜᵯAæÓ¾᪷kQ=rRt¨©ᙠᵯ×IâÜᵯAtÓ@AQRᡂlᡠéê\R”'=R6.(2)ÎᔾᦈḄ×s/ЫÑÒᔾᦈḄ×s/Q=cmAtQ*=Q,ᡠcÎmïZXt*=cm/\tᑣᨵ/c=c*At*/mAt,⌕\c=cᩈZ\tÎ/Z\téêᨵmQm,ᡠô⌕ᵨᜩÍᩭöÏsÓ¾ḄÎâЫÑÒ.(3)⌕\ÎâЫÑÒḄ÷ᓣùḄúéê\ᵯᙠÓ@ḄAᑁäüýḄ×sþᵯ•Ḅ᪷Q=I2RtᜧᵯḄᵯᑣ◤⌕ᘤᓽᱏᔣA%&.73.(1)3.(2)/0114.ூ4᪆௃(1)78Ḅ9ᵯ:;3.8V,ᵯ?ᵯ:⌕ᜧ@3.8V,A⁚CᵯDḄᵯ:;1.5V,ᡠGᨬI⌱KL⁚CᵯDMὶO;ᵯ?.(2)Pᑖ᪆ᘤR⌱KS☢UVWXY,ᘤZ[\]^ᑮ`aᵯbᦋ78ᵯ:bᵯḄOᵨ.ᘤ⌕⌱KASAeWXY;78Ḅ9ᵯ:;3.8V,gᵯ:⊤Ḅij\]⌱3V,ᡠGkW15WXY(3)ᵯ⊤ᵨḄ0m0.6AijoAVᜧpq⊤0.2A,oAVpq⊤0.02A,ᵯ;0.28A,P=UI=3.8VX0.28A=1.064W.ᵫ@ᵯ?ᵯ:ᨬIᵨ3⁚CᵯDᡠGᵯ?ᵯ:ᨬw4.5V,ᡠGᘤU%ᵯ:ᨬx0.7V,yxz{78Ḅᵯ;0.28A,ᡠGz{ᘤḄᵯ|;0.28A,ᡠGᘤḄᵯᨬ;}R=U/I=0.7V/0.28A=2.5Q஺(4)787ᯠᵯᡠGᵯ⊤Ḅᦪ;ᵯ:⊤Ḅᦪ;ᵯ?ᵯ:ᨵᦪ஺74.জ/e1..0ᫀ19⚓41⚓

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52ᔁᵫᡂ᪥ᵨ0ᫀ¡ὃ஺ô1õᐜᜧô2õ6,10AAô3õ/=—0.1—•7+0.6Aᡈ/=0.1-(6V-U)VVூ4᪆௃ô1õᵫ⊤pøWùô2õú;PûëḄUVûḄUûüÍ@6VবᵫP=UII=P/U77.ô1õ0-3Vô2õÿᵯ⊤ὶᙠᘤḄ30.2a2.50.220.55ூ᪆௃1ஹ1᪷Ḅ!"ᵯ#"ᵯ⊤Ḅ$%.2ᙠ&⁚ᘤ()⌲+,ᵯ-.ᵯ/ᜧ)1ᵯ⊤Ḅ2ᦪ4)56ᵯ⊤789ᙠ4Ḅ)18ᵯ⊤:ᘤὶ;.3᪷P=UI<=>(Ḅ?▭A᳛)⌕D4Ḅ!"A᳛)EF4ḄᵯG2.5V,᪷Hὶᵯ-ᵯḄᑖᱯKLMEN4ᘤᑖOḄᵯ)ᓽN4ᘤ9ᐭᵯ-ḄᵯR᪷ᵯ/⊤Ḅ$%SᑖTUV=WXḄ!"ᵯ/)ᑭᵨP=UI<=4Ḅ!"A᳛.2ஹR1ᵫḄ\]LM!"ᵯG2.5VV3V,ᡠ_ᵯ⊤Ḅ$%G0`3Va2ᙠbᱏ()⌲+,Ḅᵯdᜧ)1ᵯ⊤Ḅ2ᦪ4)56ᵯ⊤789ᙠ4Ḅ)18ᵯ⊤:ᘤὶ;.3⌕D4Ḅ!"A᳛)EF4ḄᵯG2.5Va>(4ᵯ4efḄ!"ᵯ56ᘤᑖOḄᵯᜧ)᪷Hὶᵯ-ᵯgᜧᑖOḄᵯgᜧLM)EN4ᘤ9ᐭᵯ-ḄU)ᡠ_Eᔣab.ᵫi20jLM)ᵯ/⊤Ḅ$%G஺`0.6A,ᑖTUG0.02A,ᡠ_4Ḅ!"ᵯ/G0.22A,ᑣ4Ḅ!"A᳛GP=UI=2.5Vx0.22A=0.55W.ὃKRnopDᵯA᳛KqRr⚪ὃt;ᵯ⊤$%Ḅ⌱vஹᵯ/⊤ḄVᦪஹwx"yᵯA᳛z{Ḅᮣ}Eᵨ)~8⌕ḄMK)8.ὃ.ὃḄᑁ78.1Da24-aᔠᐵᘤᱏᨵᑮᨬᜧUᜐ3জ1.14▬ঝ7.3஺ঞ1.5Wa44.7஺`12஺aூ᪆௃⚪ᑖ᪆:R1ᵯ/⊤:ᵯ⊤Ḅᣚ¢9;)ᵯ--)ᵯ-ᵯ/G£)ᵯ/⊤:4ᵯ7¤¥¦)4ᵯ7,)ᵫeᵯ§ᵯ86V,4eᵯ⊤$%0`15V,«>ᵯ⊤7¤¥¦)ᡠ_ᔠᐵ¬¤⌼ᡂḄ¯°8RD4ᵯ7,a2ᔠᐵ)ᘤḄᱏbᑮᨬ±()7,)ᵯ⊤ᨵ²ᜧḄ2ᦪa³´t)µ¶¢9·¸)ᑣᵯ-ᦑº8R4-a᣸◀½ᦑºᣚᵨ¾ᐗÀ¬)ᔠᐵ(,ÁÂᑮÃ,ÄŬÆᓽᰐÈ)½ÉÊᙠËÌX%.Ḅ7ÍÎᜐ8RᔠᐵᘤᱏᨵᑮᨬᜧUᜐa3জᵫ⊤.ᦪM)!"ᵯU=3.8VÑEḄᵯ/1=0.3A,ᑣḄ!"A᳛P=UI=3.8VX0.3A=1.14Waᵫ⊤.ᦪÖR=U/ILM)×4ᵯᵯḄdᜧ)4ᵯᵯᜧ)Ø8«GR×ᵯdᜧஹᵯ/×Îdᜧ)4ᵯḄ?▭A᳛P=UIdᜧ)ḄÙTᓣÛ)Ü>LÝRÞᵯ×ÙTḄᓣÛ1dᜧaঝ4ᵯßàᐝ()ᵯG!"ᵯU=3.8V,ᵫ⊤.ᦪM)>(ᵯ-ᵯ/1=0.3A,ᵫHὶᵯ-ᱯKM)ᘤᵯU»=U-Uä6V-3.8V=2.2V,>(ᘤ9ᐭᵯ-ḄUR᪹U▬/I=2.2V/0.3A~7.3Qaêᫀì21⚓)î41⚓

53rᔁᵫðñòÊᡂ)óôõ᪥ѬFᵨ)êᫀ÷øùὃ஺ঞúØ᪵ḄüýþÿḄᵯὶᙠ6VᵯḄ,Ḅᵯ3V,ᵫ⊤ᦪᵯᵯI=0.25A,ᑣὑḄ᳛P=UI=6VX0.25A=1.5W!(4)ᵯஹ#ᐵஹ%&'(ᘤஹ*ஹᵯ⊤+ᡂὶᵯᵯ⊤-ὶᙠ%&'(ᘤ*,aஹ.ᵯ⊤/ᦪ0ᨬᜧ33V4ᵯḄᵯ06V-3V=3V,ᵫ⊤ᦪᵯ00.25A,54%&'(ᘤᐭᵯḄ(3R▬83V/0.25A=12Q!bஹ.ᵯᵯ04.5V4,ᵫ⊤ᦪ,ᵯᵯ00.32A,54%&'(ᘤᵯ06V-4.5V=1.5V,54%&'(ᘤᐭᵯḄ(3R▬2=1.5V/0.32A94.7Q!ᑣ%&'(ᘤᐭᵯḄ(3;4.7Q<12C!ὃ>?@AᵨᵯᘤḄᵯ᳛CD79.(1)E#(2)O.1A(3)G⁚%&'+ᘤIᵯ⊤Ḅ/ᦪ0O.3AJKᵯ⊤Ḅ/ᦪU(4)P=0.3UூM᪆௃ᑖ᪆?(1)0RSTᵯUᵯ4#ᐵ⌕E#!(2)WX/ᵯ⊤ᵨYZ(0-0.6A),[ᦪ00.1A!(3)\ᙠᵯᵯ00.1A,⌕]^_`ᐝb⌕]cdḄᵯeᜧ]UᐭḄᵯ('ᵫWfgᔣij&%ᱏ.ᵯ⊤Ḅ/ᦪeᜧ00.3A,[l54ᵯ⊤Ḅ/ᦪU!(4)ᵫ(3)mlR^_`ᐝ4Ḅᵯ3nᵯ3ᑭᵨP=UIpqr᳛!(5)CD4ᵯU^sᘤᩞuᔜwxḄUyz{|ᵯᵯd}]ᵯḄᵯ~ᑮ0.3A.M?M?(1)Uᵯ4#ᐵ⌕E#Ḅ0RSTᵯnᵨᵯᘤ!(2)WX/ᵯ⊤ᵨḄ0-0.6AYZ[ᦪ00.1A!(3)⌕]^_`ᐝ]ᵯ'ᜧ]UᐭḄᵯ('⌕ᔣij&%ᱏ.ᵯ⊤Ḅ/ᦪ00.3A,[l54ᵯ⊤Ḅ/ᦪU!(4)P=UI=UX0.3A!(5)0CD4ᵯU^sᘤᩞuᔜwxḄUyzᡠ{|ᵯᵯ}.ᦑᫀ0?(1)E#!(2)0.1!(3)j&'(ᘤḄ%ᱏP,]ᵯ⊤Ḅ/ᦪ00.3A,[l54ᵯ⊤Ḅ/ᦪU!(4)P=UX0.3A!(5)ᵯᵯd}.80.(1)2000(2)9.2X104,(3)ᓄᓄḄ}ᓄ(4)2800(5)b,JூM᪆௃⚪ᑖ᪆?(1)ᵯᧅ⊟Ḅ?F=G+F”=mg=mg+=1.3kgxION/kg+19N=32N,F32N⊟Ḅ?p=-=ߟߟ=2000Pa!S160xl0-4m2(2)¡ᵯᧅ⚜£dZ¤¥¦§ᔾᦈḄ£Y?Qᔾ=cmAt=0.46xlO3J/(kg«࠷)xlkgx(220࠷-20࠷)=9.2x104J!(3)|«¬ᑮᧅḄgᵨ®zḄᩞᧇᑴ⌼“«¬³”!ᧅ¦§¡µḄᕜ;ᨵᜧY“¸¹”º᝱Ḅ'ᡂ¼᝱Ḅ¡¼ᯠ¾'ᡂ᝱Ḅᫀ¿22⚓41⚓

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61Wᔁᵫ¢£¤¥¦ᡂ8¨©ª᪥¬®ᵨ8ᫀ¯°±ὃ஺(2)ᵫ3456ZὶᵯDḄᵯµ¶6ᵯ·ᵯµ8ᵫJ᳛_`+J᳛.psvvp/¸¸(1)LḄ5ᵯFL=ߟ»L=---=1A,LzḄ5ᵯF3—=6"84V=2A,Uτ6VU2/3V•.TVL,.♦.ÀὶC8/ᐝ8/~ᨩ8ᐝḄ/5^L,AU,=U»i(=6V,U=I,R=1AX1.5Q=1.5V,22U=UI+U=6V+1.5V=7.5V,2(2)ᐝḄ88Pi=Pk6W,P=UII=1.5VX1A=1.5W,22(3)SPi>P2,Ä“6V6W”~.(1)ᵯ·ᵯµ=7.5V,(2)ÀὑḄ▭J᳛ᑖÅ^6Wஹ1.5WS(3)“6V6ᵬ'~.96.(1)ᵯÇÈEÇᔾᦈḄËÌ^2.016X10஺S(2)ᵯÇÈÍÇḄ▭J᳛^900W(3)ᵯÇÈÎËḄᦔ᳛^93%.ூ&᪆௃⚪ᑖ᪆(1)ÇᔾᦈḄËÌQ=cmZkt=4.2X1(0/(k.࠷)XO.6kgX80࠷=2.016X105JSg90r(2)ὑḄᵯW==0.06KWh=216000JS1500r/kWhW006kWhᵯÇÈÍÇḄ▭J᳛P===0.9kW=900Wt460h(3)ᵯÇÈÎËḄᦔ᳛஻=Q=201600JX100%=93%SW216000J(1)ᵯÇÈEÇᔾᦈḄËÌ^2.016X10)S(2)ᵯÇÈÍÇḄ▭J᳛^900WS(3)ᵯÇÈÎËḄᦔ᳛^93%.ὃPËÌஹᵯJ᳛PVW⚪^/⍝ᵯqhËqḄØᔠTᵨ⚪8h¦Ùk8®q¦Ú+qÛᱥᳮᨵᵨ8ÞßQRCḄᓫábᣚ⌕.97.(1)7X10%(2)140(3)ãᵯDC8äå▲Fᘤᵯ;=0Q,¬ᵯDèéêSᵨᵯᘤëᯠíDC8äå▲Fᘤᵯ;ëᯠî=14Q,®ᵯïEḄᵯFᙠñᑁó¥஺(3ᑖ)ூ&᪆௃⚪ᑖ᪆:(1)P=U/=3.5X104X2X103=7X107W(3ᑖ)(2)Ro=ö=35*10=÷ø2(3ᑖ)/í2.5X103(3)ᙠR0ùúḄᩩüý8ᨵþÿ▲ᘤ“ᵯ◅”ᳮᵫᵯᵯᵯ(2.5kA)"▲ᘤᵯ#0,ᵯ&'()*ᵯ+"▲ᘤᵯ,ᫀ.30⚓041⚓

622ᔁᵫ45678ᡂ:;<᪥>?@ᵨ,ᫀBCDὃ஺#GᵯᵯHᜐJGK᝱.ὃMᵯN᳛ḄQR*STGUḄVᵨ.MW(1)Y▲ᘤḄᱯឋ\ᑖ᪆_ᨵᵯaᜧ(c2\d8+ᡈᵨᵯᘤ0N᳛fᜧ)"gᐹᨵᵯ#@iᵯjk+lm)ᵨ*(2)no◅ᵯfᜧ"ᰚmᵯqᦑs᣸◀?◤wᣚ◅yz{|*▲ᘤ}~lᑮmᵯḄ)ᵨkᵯ“ᵯ◅”.98.(1)QḄMᵨ⊟ᵨᩭᔓ⁚*(2)⊟ῃ"Ḅ&'()ᵯ1.5A*(3)জᔾᦈḄ8.410(ঝ⊟ḄN᳛1250Wூ&᪆௃⚪ᑖ᪆(1)Y⁚¡☢ᑖ᪆⊟ᵨᩭᔓ*⊟ᨵN~£¤¥ᦔ§;(2)©⍝ῃN᳛«&'()ᵯ¬ᑭᵨP=UI²⊟ῃ"Ḅ&'()ᵯ*(3)©⍝Ḅ³ஹḄyµஹḄ¶·ᓣ¤ᑭᵨQQcmat²ᔾᦈḄ*ᵫ⚪©Q!t=WX8()%,²ÁÂὑḄᵯ~ÄᑭᵨP=ᜐ²⊟ḄN᳛(1)QḄMÅ■ᵨ⊟ᵨᩭᔓ⁚;(2)VP=UI,⊟ῃ"Ḅ&'()ᵯT_P_Pῃ_330W_1RA1--------------1.uA;UU220VÉ3ÊᔾᦈḄQᔾ=cmZ\t=4.2X10/Ék.࠷ÊX20kgX10࠷=8.4X107,gᵫ⚪©Q.»=WX80%,ÂὑḄᵯ~£0^8.4X1Q5J<>jW===105xl0É80%80%⊟ḄN᳛^1.05XlQ6Jp==1250fft14X60sὃMᵯN×ḄØᔠQR*ḄQR*ᵯN᳛ḄQRMW⍝ᵯØᔠ⚪ᐵÛÜÝÞᐸàáḄVᵨᨬµ᧕Á┯Ḅ¶·ᓣ¤ᑮ«¶·ᓣ¤åæçèᯠêḄᭆì99.RHP3V♦5=4V»><---S3a-.---------5——⚪3஺1ᑖ,ᫀ.31⚓041⚓

632ᔁᵫ45678ᡂ:;<᪥>?@ᵨ,ᫀBCDὃ஺/ï=ð(&+a+g)প':2ফð1ὶô(1)(2)Ýi4R|=7?2+R3(3).....................................1ᑖùúûüভ(723%+R,4U=4V(5)ὶô(4)(5)ÝiU23=16VU=4V+16V=20V..........................................................................................1ᑖq=8V5=R=2UR3224=4QR=6஺2R=10Q.........................................................................................................1ᑖ3ð/1.”3&4QP=I2R=(1A)2X10Q=10W333ூ᪆௃ᶍ100.(1)2.94X10(2)5A(3)3.3X105JḄ!,ᵯ$%ὑḄᵯ'ᜧ)ᔾᦈḄ,஺./01!2ᔾᦈ,Ḅ3425ᘤ7⌕ᔾᦈ,2349⌕ᔣ᜜ᦣ2=%ὑḄᵯ'ᜧ)ᔾᦈḄ,(4)ᵯ>?@ABᡈDE☢GH2ᑣ?@AḄᵯJKLMᜧ,ᙠOP4QᑁᵯS?@ATUḄ,KLM,5᧕WXYZ[\ᐰ^ᦑ஺ூ&᪆௃`⚪ᑖ᪆c(1)◤⌕ᔾᦈḄ,Q®=cm(t—tD=4.2X103J/(kg•࠷)XlkgX(90࠷-20࠷)=2.94X10)2(2)ᵫ2=஺/uᵯ$vwxy4ḄᵯS,P1100W#I--=5AU220V(3)t=5min=300s}ᫀ32⚓241⚓

64ᔁᵫUᡂ2᪥=ᵨ2}ᫀὃ஺ᵫ=uᵯ$vwxy5min%ὑᵯ'tW=Pr=11001Vx3005=3.3xlO5JḄ!2ᵯ$%ὑḄᵯ'ᜧ)ᔾᦈḄ,஺./01!2ᔾᦈ,Ḅ3425ᘤ7⌕ᔾᦈ,2349⌕ᔣ᜜ᦣ2=%ὑḄᵯ'ᜧ)ᔾᦈḄ,஺(4)ᵯ$[᳛ᜧḄᵨᵯᘤ2xy4?@AḄᵯSLᜧ᝞ᵯ>?@ABᡈDE☢GH2ᑣ?@AḄᵯJKLMᜧ2ᙠOP4QᑁᵯS?@ATUḄ,KLM25᧕WXYZ[\ᐰ^ᦑ஺ὃc,ᵯ'\ᐰᵨᵯ101.(1)44Q(2)6.6X10)ூ᪆௃(1)ᑭᵨPᵯ¡P᳛2¢£ᵯ¤┡ḄᵯJ.(2)᪷§QxW=Pt.}cc(1)ᵯ¤┡P᳛11100«Pᵯ1220V,u2(220V)2ᵫ¢uᵯ¤┡ḄᵯJcR=—=-----L=44Q.P1100W(2)ᵯ¤┡vwxy4,ᐸ±▭᳛[)P᳛,ᓽ1c1100W,xyḄ4Qt1600s,ᵫ´uᵯ¤┡TUḄ,cQᦑ=W=Pt=1100wX600s=6.6X10).}:(1)ᵯ¤┡vwxy42·ḄᵯJ/44Q.(2)ᵯ¤┡vwxylOmin,·TUḄ,/6.6X10).102.(l)105Pa;(2)2t;(3)24Jூ᪆௃`⚪ᑖ᪆c(1)☟¼4½¾☢Ḅ¿p=£=@=20000,=]05Pq(2)•.,ÅÆᩩÈḄᵯSW0.2A.τᓃ….SS0.2m,4ᵯ¾!ḄᵯJ1cRJ=6V=3()QËÌᵯJḄJÍ1cRÎR-Ro="-4"O°ÒÓᵫÔÕu24ÌᵯJᡠ×ØḄÙ1cFO=2X1O5N,4ÜÙ¡ÙÝ[2ᦑ½ḄÞ,120t(3)⌕ßᑴᵯ¾ᵯ᳛H2ᑣ◤ᵯ¾ᵯJᜧ2ᵫÔ2u£ÌᵯJᨬᜧJÍ180Q,4ᵯ¾!ḄᨬᜧᵯJ1:R'w=R°+IU=10Q+80c=90Q,ᵯ¾!ḄᨬHᵯ᳛1c=^=1|=0.4(W),t=lmin=60s,%ὑḄᨬHᵯ'1:WMTt=0.4WX60s=24J.11103.(1)èéᜐ)ëìí᝱4ìßïᐵS஺òᜐ)óïí᝱ᳮõ/öïᐵᜐ)óïí᝱42ᵯ¾!ḄᵯJᨬᜧ2R|ḄᵯSᨬH2R1Ḅ᳛ᨬH.(2)R¡R2ḄᵯJÍᑖø/40Qù1170Q.(3)ûüýþḄÿ20࠷100࠷,◤⌕630s.ᫀ33⚓41.⚓

65ᔁᵫᡂ᪥"#$ᵨᫀ&'(ὃ஺ூ&᪆௃+⚪ᑖ᪆/(1)234ᐵ6ᜐ894:᝱஺ᳮᵫ/=4ᐵᜐ894:᝱>ᵯ@AḄᵯCᨬᜧFGRḄᵯIᨬJRiḄL᳛ᨬJ.U2(2)=4ᐵᜐ8Nᔠ:᝱>PQRᜐ8:᝱ᵫSTP=——XR2_(22ov)2t\\———4U'2,Pஹ1210Wu2(220V)2=4ᐵᜐ894:᝱>PQRᜐ8^2:᝱&,==')=12100,aP40IV2R=R.e-Ri=1210O-400=11700.2U2(220V)2m(3)R.===1000W,ᵫ᜛=XQḄij/m=pV=1.0X103kg/m3XL5X10sRs40QV5kg,,ufc,cm\t4.2x103J/(kg•࠷)x1.5kgx80࠷…ᵫST/Pstxn=cm^AtXat='&&=630sP81000WX80%ὃ/ᵯL᳛Ḅᔠ104.(1)12Q(2)48Q(3)1.5Wூ&᪆௃+⚪ᑖ᪆/(1)CᘤḄᱏᙠᨬ>Cᘤᐭᵯ@ḄCᡠ=4ᐵNᔠ>LᵯCR2ὶ94SzஹNᔠSஹSi>ᵯCR24@஺ᵫ¢£¤,LᵯCRsὶ>,FGᵯCR2ḄᵯI¥=1A,ᑣ£XᵯCR=U/Iz=12V/lA=12CCᘤḄᱏᙠᨬª>Cᘤᐭᵯ@ḄCᨬᜧᡠNᔠSஹ948>RஹR?¬ὶRஹR?¬ὶḄᵯCR=U/L=12V/0.2A=60Q,CᘤḄᨬᜧCRI=R-R2=60Q-12Q=48C஺ᵫP=U7R£XR=U7P=(12V)2/6W=24Q,CᘤḄᱏᙠACᘤᐭᵯ@ḄC24஺NᔠSஹSi,94&>LCᘤ¬ὶᵯ@AḄᵯIl3=U/(Ri+R/2)=12V/(24Q+24Q)=0.25A,Ḅs▭ᵯL᳛P=I2RI=(0.25A)?X24Q=1.5W஺:1ὃ/ᵯ@ᑖ᪆°±²³ᵯL᳛106.(1)0.91A(2)44Q(3)7.5x10஻ভ1000W,s▭ᵯ·J8¸²ᵯ·ூ&᪆௃p2QQW+⚪ᑖ᪆/(1)ᡭº>L᳛R=200W,ᡠᵯI/4='=------=0.914U220VU2(220V)2(2)>L᳛P2=1100W,ᡠᵯC/R=----=44Q/P1100IV2(3)ᵫ»¼£¤½¾¿Àº,ᐳÂÃL=2min,t2=Umin,ᡠÄὑḄᵯÆ/W=ᵯ+&2=200WX1205+11OOWx660s=7.5x10"ᫀ34⚓41⚓

66ᔁᵫᡂ᪥"#$ᵨᫀ&'(ὃ஺(4)ÀºRᙠ>IminÄὑḄᵯÆÈ/W="MP1.,=kWh1SOOimp/kW•h60W-kW-hs▭L᳛/É==%-----=MW=1000W,——h60s▭L᳛J8¸²L᳛ḄÊÈs▭ᵯ·J8¸²ᵯ·஺ὃ/ᵯL᳛107.1ᵯ$VWᵯbI=PU=50A1ᑖᵫ⊤⌱☢F10»2Ḅ1ᑖফᵯ$VW4s6Ḅ)RF:Q=f=Pt=2OOOWX4s=8OOOJ1ᑖAf-2--------------V-100•rcm0.4xl0,x20xlO51ᑖ¡¢£¤¥100Cᡠ§ᩩḄ©ª¥1100Cᦑ᷒ᩩ¢£ᐰ®ᰚᓄ1ᑖ3a.ᵯ$VWᨵ5ᐝ£⌼ᡂᐝµ¶b.ᵯᰦ$VW£6ᵯ¸,B¹!ᵨᵯᘤḄ»¼VWc.ᵯ$VWᨵ5ᜧᵯb⌼ᡂ▬¾¿À!ḄᵯÁᵯM¢ÂEÃÄÅÆÇÈÉ1ᑖᐸËÅᫀÍ⌕ᔠᳮ§ÏÐÉᑖூÌ᪆௃ᶍ108.Ï1ÐᵯIÏ2Ðᯖὡ²³Ï3ÐÓÔÕ>$ᵨÖᜧL᳛ᵨᵯᘤூÌ᪆௃+⚪ᑖ᪆/Ï1Ð×Ø₹Èᢣᵯ@AḄᵯIGᜧÏ2Ð᪷Üᯖὡ²³¢>ÝÞßjGÖà᧕âãäåæçè@éêëìíîÏ3Ðï⚜■òóíîḄç6"ôᵯ@õöᦋ⌼ùàÕ>úûüAÓÔÕ>$ᵨÖᜧL᳛ᵨᵯᘤ஺ὃ/ýᐰᵨᵯ109.Ï1Ð5Ï2Ð400Ï3Ð2X1Ï02.5X106JூÌ᪆௃ᑖ᪆/Ï1Ðᵫ8⚪Aÿ᪷ḄᓽḄs=ri=15km/hX20min=15km/hX—h=5km()2*ᵫ,-ᒴ/0Ḅᦑ23ᑮḄᱫ6738,97:᪷;ᩩ=97->?Ḅ0.04Bᦑ;40.04mg=0.04X1.0X103kgX10N/kg=400N()3*FGHὑḄᵯKLM-NKOPQR-ᨵᵨRᦑᐜGᨵᵨḄPQRᯠWX᪷ᵯKYᓄ[PQKḄᦔ᳛-80%ḄᐵaGNR஺)1*5()2*400()3*ᱫ67cḄRd6s=400NX5X10*2XlO'j(ᵯ0PHὑḄᵯK/jkl=m”=2.5X106J(780%qᫀs35⚓N41⚓

67uᔁᵫawx0dᡂz{|᪥~Wᵨqᫀὃ஺ὃḄᓫRḄᓫ஺110.(1)ᐝ᩽ᵯ(2)⁚K90%ḄᵯKYᓄ[ᐝ:80%ḄᵯKYᓄ[Kᨵ20%ᵯKYᓄ[ᐝK.(3)25,5((4)Kூ᪆௃⚪ᑖ᪆(1)LED⁚K-ᵨᐝ᩽¥ᐝ¦Ḅ§¥Hὑ¨ᵯK©ª«ᵯKYᓄ[ᐝK.(2)⁚Kᐝᦔ᳛¬Ḅ©-⁚K90%ḄᵯKYᓄ[ᐝ:80%ḄᵯKYᓄ[Kᨵ20%ᵯKYᓄ[ᐝK.(3)40WHὑ1ᵯḄ¯°§¥t=w/P=l/0.04w=25hªḄᵯR᳛P=W/t=lkW«h/200h=0.005kW=5W.(4)©[µ᜜·¸᜜·¹º,ᐝᡠ¼ᡃ¾K¿ᑮᐝÀÁᨵḄµ᜜·¸᜜·.ὃR᳛ḄKOYᓄᵯKḄ¿Ḅᐝ111.(1)ÂÃᦪᓄᵯÅA(2)ᔾᦈOBூ᪆௃(1)ᵯWᵯÅᵯ9ÊcRËdOÌ᯼Îᔾᦈ᯼ÎḄÂᓣÐÑÒÂḄÃᦪᓄᩭᑨÕᵯÅËdḄOḄÖ×(᝞ÙÚÛÀÜ9ÝÞḄᵯ9ÊßὶḄᵯÅᵯáÞẆãᵯÅËdḄOäåæᵯ9Ḅᐵa(᪷Q=஻RtR,ஹÑRBáÞᑁR,ஹËdḄOÖAìÃᦪÐ.(2)áÞ9ÝḄᵯ9ÊíAஹBÜîïæðñ”ᐜòᔠSiS”WòᔠS3,õöWÕ÷S3”ø᪵ú¥ûüðáÞÜᵯÊËdḄOá8ᓽÜîïæᔾᦈḄOá8(ýAïæÀÂÃᦪḄᓄOᜧÿᓄᜧ᪷Q=cm^tᔾᦈᓄᜧḄᓽAḄஹBḄᜧ.112.প)*+,-(2)ᓄ01(3)3.6X107J576N(4)1.152Kgூ>᪆௃A⚪ᑖ᪆D(1)EFGHIJEKILMNᔲ*+PᩭRESJ)*+MNTGHIUV,-WXYᑁM[ᓄ\I]MT(2)^_`⏚b┞ᵯeYᓄ0M[ᓄ\ᵯMfᵯHIgᵨTEF᜜jJkljmEFno^_pᑁqrstuvḄwXxvwXykoᜧz{EFᙠz{}x~+ᔣuḄᓣEFw☢Ḅz1T(3)ḄᵯMDW=W?=500Vx20A//=500VX200AX3600A=3.6X107JᵯHIᦔ᳛\80%DW'=W80%=3.6x10?Jx80%=Fs=Fx50x1()3>DF=576N,ᒴo^_Df=F=576NT(4)᪷⚪DW80%=Q25%4.6X3.6X106JX80%=Q25%>DQ=5.2992X107Jᫀ36⚓41⚓

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69ᔁᵫᡂH᪥ᵨHᫀiὃ஺'»Ao----1pl—{|-----oBRiR2Cᡠ_AB.ACblᩭfHᨵRஹRzὶbᐭH᪷7-᳛¡¢P=U7R+U7R=(6V)715Q+t2(6V)2/10Q=6Wঝuᑨ¨ACUVW:pᵯRLRHIOQnABUSKW:pᵯRஹR?zὶHᑣR2=RB-RK=15QT0Q=5Q}᪷7BC'ᨵᵯju~ᵯjgᙠABஹAC.ᡠ_Z᪀᝞ᡠ_AB,ACblᩭfH¯dABRz°HᨵRbᐭH᪷7-᳛¡¢P=U7R=(6V)7100=3.6Wὃ±-᳛Ḅ#$nᵯḄb115.(1)aᵯ³nbᵯµ¶(2)4A5.28X10'jூ¼᪆௃(1)ᵯᔿ¿✌ᐜvᔿ¿Hᡠ_ᵯMᨵVᵯ³nᵯᔿ¿ÂvᔿÿHÄvᔿµ¿Hᡠ_ᵯMÅ⌕ᨵVÇᵯµ¶Èᵯ³ὶ.(2)É~ᵯᔿ¿Ḅµ¿-᳛Êÿ-᳛Hu_<ᑮᵯµ¶Ḅ˵-᳛É~ᵯµ¶Ḅ˵-᳛ÊÌÍᵯNHᑭᵨI=P/Uu_<ᑮÌÍᵯnÉ~˵-᳛Ê˵fHᑭᵨQ=Pt<ᑮyµÏ.(l)aᵯ³nbᵯµ¶(2)\]ᔿµ¿fHᵯµ¶+ὑḄ-᳛P=1000W-120W=880WÑÒᵯµ¶ḄᵯᵯÑÒᵯµ¶yḄµÏ஺=yᜐ=pf=880Wxlx60s=5.28x10%116.(1)8Qn0.75An2.7xl()3jnÓ)21n(3)Ô:ூ¼᪆௃2⚪ᑖ᪆(1)ᵯḄpR=—=—L=8QP18Wᫀ38⚓H41⚓

70ᔁᵫᡂH᪥ᵨHᫀiὃ஺Uu12VÑÒᵯḄᵯI====0.75AR×2R2x8஺ᵯÑᵯ5minyḄµÏ஺=>=(0.75A)2x2x8Qx60x5s=2.7xlO3J(2)ᙠÞᵯß}bVWRᐵHᵯv_Ká-᳛ÌÍHᑣâᔠtRᐵHgVWᵯ°Hᵯ᝞ᡠU1âᔠRᐵHfHKᵯzὶHᵯḄ-᳛/4=nâᔠRᐵSfHRå°Hᵯz2RU2MᨵR,ᵯḄ-᳛/P=,P:È=2:1(3)æáᵯ/KᵯzὶஹᨵVWᵯஹKᵯὶHᵯMH`ᨵRᐵSâᔠfHKᵯzὶH`ᨵRᐵçâᔠfHᵯMᨵ`âᔠS2ஹèfHKᵯὶ஺ὃ±ᵯ-᳛ᵯµᵯ117.(1)ᵬ(2)Bn(3)êëᘤᐭᵯḄpÒᜧHîïḄ▭-᳛ñòn(4)AnóᑮᵯN⊤Ḅᦪ/2.5Vn(5)0.75Wn(6)ô\õHîïḄ▭-᳛ôöQ-᳛Ḅ÷ᙳpூ&᪆௃2⚪ᑖ᪆(1)bᵯfHᵯ⊤zὶᙠᵯMHêëᘤḄdeVßVbn(2)RᐵâᔠùHêᱏgQpᨬᜧHᓽMᡠḄBLn(3)ᵯ⊤ÊᵯN⊤ᨵᦪHIJᵯMᨵᵯHòîï'ᨵ°ᡈ¨HôýUᵫQᵯMᵯñòH¯þòîïḄ▭-᳛ñònᫀ39⚓H41⚓

71ᔁᵫᡂH᪥ᵨHᫀiὃ஺(4)⌕ÿḄ᳛◤ᵯ⊤Ḅᦪ2.5V,ᵯ⊤ᦪL8V,ᑣ⌕ᔣA!"#$ᱏ$#&'ᘤ)ᐭᵯ+Ḅᵯ',-./ᑖ1Ḅᵯ2,ᑖ1Ḅᵯ3ᜧ5ᵯ⊤Ḅᦪ2.5V6(5)9:;<=>?ᵯ@⊤Ḅᦪ0.3A,ᑣḄ᳛CP=UI=2.5Vx0.3A=0.75W6(6)HᙠJKLᐝNOPḄᵯ᳛ᵯ᳛QRᙳTUᨵWXḄ஺ὃ[C\]^_Ḅᵯ᳛118.(1)aὶ(2)36kW.hூ&᪆௃(1)efgᓫᑐjklᐵn)ᙠopfqrὶCefgᓫᑐjklᐵn)ᙠspfqaὶ஺(2)rὶCὑᵯW.=Pt=0.2kWx2h=0.4kWh,Ḅᵯ'J(#U2_(220V)2-=484஺V100Waὶ:qḄᵯ'R'=484Q><3=363Q,ᵯiiov,᳛P'=(11°V)=100w4363Q3aὶ᳛P=6°W,ὑᵯW*=%t'=26°xl(T3KWx9h=0.6kWhgὑᵯCW=W#+W61C=1kw.hᢥḄᫀgᨴὑᵯW'=lkW.h/ᜩX30ᜩ=30kW.hᫀgὑᵯW0=P(t+f)=2X0.lkWXUh=2.2kW.hgᨴὑᵯW஺'=2.2kW.h/ᜩX30ᜩ=66kW.h⁚ᵯ¡¢W=66kW•h—30kw.h=36kW.h119.(1)᝞;ᡠ6(2)ᨬᜧ6(3)B6(4)Tᵯ'R஺Ḅ'T90Q6(5)©ª«¬Ḅ®5¯2X10%,°±²ᑁᢣµὑḄᵯ¡L8X10'J.ூ·᪆௃º⚪ᑖ᪆C(1)ᵫ⚪W½¾ᵯ'R.Ḅ'T<=¿ᑴᵯÁÂᵯᘤÃÄÅÆᡠ=ÇHKaὶᙠᵯ+ÈÉ)ᵯ+᝞Êᫀᡠ6(2)ᵯÁÂᵯᘤËᙌÍ᪗ᨵ“10஺40mA”/ḄWÒᢣËᙌḄᵯ'10஺ᐕÔÕÖḄᨬᜧᵯ@40mA,©Ö×ØÙÚËᙌ.(3)᪷Ü:;<½ÝḄ'TÞ®Ḅ3ᜧß,9ßᵯÁÂᵯᘤËᙌᵯ@3ᜧßᵯ@3ᜧØÊᫀà40⚓41⚓

72âᔁᵫäåæ#çᡂéêë᪥íîᵨÊᫀðñòὃ஺ᔾô⊖ö)ÕB,÷ᵫe«¬ᜧøùøIX10%ûüஹþÿ⊤Ἥ.ᑖ᪆⍝B(4)ᵫ⚪ᜧIX10'N()ஹ+,⊤Ἥ-./0ᙌḄᵯ.ᜧ30mA(ᵯ0ᙌḄ7ᵨᦔ:ᜧ;<Ḅ7ᵨᦔ:⊖>?ᔾABCᔠEFGE=1X10%(,L=100஺N(ᵯOᵯ.I=30Ma=0.03A,U=6V,ᡠGR=U/I=6V/0.03A=200Q,0ᙌᵯ\R0=10Q,ᡠR°=R,-R-R0fie=200Q-100QT0Q=90Q(5)ᵯcdᵯᘤ0ᙌ?fg(ᵯOhḄᨬjᵯ.k40mA,N(ᵯOhḄlᵯ\mR'=U/I'=6V/40X10~%=150Q,N(opᵯ\Ḅ\qmR/=R'-RrRs=150Q-90Q-10Q=50Q,ᵫFERjuᑮḄᨬjowF=2X10%,yz{☢}ᱥḄow-ḄwᡠḄᨬjlwk2X2%,N(ᐝᑣ5minὑḄᵯ:W=Pt=60WX5X60s=l.8X10'j.ffiaὃmḄᵨᵯḄ120.(1)18N(2)50N(3)Cூ᪆௃¡⚪ᑖ᪆m(1)⊤hᦪ£Dᡠuow¥¦ᜧ5N,§¨©\ᘤAPᵯ\RḄ\qªj50Q,/Dᡠuow¥¦ᜧ1N,§¨©\ᘤAPᵯ\RḄ\qªj10Q,ᡠ§¨©\ᘤAPᵯ\RḄ\qk120Q(ஹᓽªj300Q-120Q=180Q(Dᡠuow¥¦ᜧᑮ18N(2)ᵫ¬ὶᑖoUMU2=RMR2ᵯo⊤®ᦪk2V(§¨©\ᘤAPᵯ\RḄ\qk200Q,N(Dᡠuow10N,ᵫᩨᩚ{⊝ᩩ³mFUI=F2L2GC´wᜧjkF^FoXOD/OCnONXSuSON(3)ᵫF§ᱏP»AᔣB§¨Ḅ/½hᵯOhḄ\q¾©ᵯOhḄᵯ.¿¾©ᵫP=UIᵯOὑḄᵯ᳛¿¾©஺ὃmᵯOḄᑖ᪆mᦪ£Ḅᑖ᪆ᩨᩚ{⊝ᩩ³ᵯ᳛ÁᫀÃ41⚓l41.⚓

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