15.3串联和并联-九年级上册初三物理【教材解读】（人教版）

!#"!¤¥Y¦¥ ()*+!§)¤¥Y¦¥!!2*" n¢=o¢&@A XÖ¬� {¦ !¦ ÛÜ NCêÊânäaûoX Ö#NCXÖ¬�é{¦ NCêÊ!iXcNCf#N CXÖ¬�é!¦ {$S NCS N�C5 Kvmò ¨&v ò vG.� G v à]=p] %!&�C'!¦NCf.�÷�Kv�.N�g�#NC# %%&}C'!¦NCfTvN�ã±g�#�.# L1 L2 L1 S L2 !! "-!#VSTU#ÄnNCSf$¡�,ãnX�$~§C! �C%{¦ #& %!!& !!!-!!!!!!!!!!!!!. !!!/!!!!!!!!!!!!!0 &fmYH] '!(«¬LM*ÑmLé­®z A�Ü# '%(â¬LM*ÑmLé­­" Ü%®®"Ü# *& H\q(rs) �â¬LMD%L8ZZpß !̄ q"%,I°L8�&�Mª H±Må%p�­e²÷mLé -Mq#ÚÛ��ÜLMåT �õL8-ÑID9%��_, >M# â¬LMDѱMmLé#U ��# n¢H]&bc «¬ù%IñM% I}ƳGMÞ# IHT.�G´% T.kµ÷��# o¢H]&bc â¬LME¶8% @©�M5L8# �MT.Gìí% ±MLé®·«# ./$ÑT.eµÔ¥%-<D-C%�>Ü%-\]).<D-C!�C%â ¬%.\])/<D-C!$C%«¬%/VW)0<D-C!�C%â¬%0\]# 01$/ ()*1!¨©¤#¦¥�¢!!2*33*" NO$tiÎÏH] %!&ßàmn�,ÉÊ n~§#NC 1{|}~!2 1{|}~%2 %%&ßà?mn�,ó�ÉÊmK+~§#gn%q£¤)�~§#g n& 1{|}~2 %$&�w !c{¦NCf$�,ÉÊTv?Np#c!¦NCf$}C�,ÉÊ Tv?Np$�C�,KLÉÊTc�C#?Np# "c{¦NCf$?Np)�©¨£¤$�,#�¾_3ÉÊ#NCG £¤(c!¦NCf$¡�C?Np)�¨q£¤# "��# mY©�qrn%o¢H] '!(̧ ¿î LM½Õ «¬LM â¬LM !î ¹f ¸¿IHmLé%vPmL éU[�¶ ¸¿IHmLé%vPmL éº[�¶ !& Ç] LM½Õ «¬LM â¬LM <) �» ¸¿IH}F%LMAÞM% .�¼}Uq` ¸¿IH}F%.�¼}º q` '%(8Aî ßü8Aîù%�3c°¼LMå%U��mGyh%?TDµ3G Lp$mLé%�m-¼U{xáà8A,¼IH{# ·<kß)LMn;"¨°¼%m8Aî3cLMå%É0$1$58 A,0{%2$3$48A,4{%|d<l#<l,<k-8AL M<# ' 8A '((( A $ "-"#çlëS'TU#NCS|S$f#{$êÊXÖ¢Ç# !! !!!!!!!!!'!!!!!!!!!!! $ ./$­Æ�<kD³eIñjI-[M%áàe²Lè$T.Q!� }Fß½,-LM%�<lD§¨;-w!ðA�Ü©n#§Lè -V.ÜQ!-5U%Q!-3UÜ}F-3U%}F-5UÜLè-a .#�¥¨í<k%§½e-L¾$Q%�Ü�58{'Q!-3U(�p Ô{'}-5U(%,Q!-3UÜL¾-3U%L¾-5UÜQ%-3 U%Q%-5UÜ}-5U# 01$RSTU# CuÇ�2øH] �mµ3GmLé-{Ôâ%ã °¼-LM<�|¿j# '!(LM�ÜÎÏD%ßGT. e;À/ÞT6Ô# '%(TDc�õG÷>M- µ¶# "& ÒÓÍ&H] >À}%«¬-%ýÛ¼å� _Á# Â�DѽLé%â¬-%ýÛ �¶å#U��# ()*4!ª«¬.�¢ {¦NCB!¦NCã&Äâã#NC${øî½f#yrNCã& 'Äâã#NCzXò1## ÑR$?Ç�1�^"¥Ï$���ºe�#��+~§r6&{¦#$v &6&{¦B!¦zXò1#(¦W#z{$�¤¿3=ý.o'($# 1uK~§&!¦#(>Ëf¡?Npã&!¦#(�Ú �#C~&! ¦#(�}?#�ÿp&!¦#(N§Mf#~§BN�3ï�&!¦## "-##+�>²vmïQ®=#N§M$e�®�§M=�$§Mq#~ VÃ(e�,n§M=�$§Mq#~V{�$eÎk3æg)�$+� nç§M=�vmn�,Q$+�#Viànkl#& %!!& -&§Mq#ë®~BÎk3{¦ .&§Mq#ë®~BÎk3!¦$�,Qc}C� /&§Mq#ë®~BÎk3!¦$�,QBë®~{¦ 0&§Mq#ë®~BÎk3!¦$�,QBÎk3{¦ ./$LM-01�Ü+-G¼½*I½%«¬%�«¬LMDL8? GIñMq%ÑmLé´µ"#��).I½%â¬%�â¬LMDL 8Gyñ8lMq%ÑHmLé´µ#U��%®·�¶#û¸Ã´è Tå%��ñ�¶%¼å