中考物理微专题复习 专题27 利用欧姆定律解决串并联电路的计算中考问题（教师版含解析）

$%&@'()*`+,-./0P1R2`2345\r3Q012Q\r6;<9(1)=>P=U?@ \r??@P:\rR\rRL=E=_^21=6Q\rPL1.5W\rNOPQRSTUV0634EvaluationWarning:ThedocumentwascreatedwithSpire.PDFfor.NET.\rNOPQRSTUV0635\r(2)SSiS2S3 ?LZ[\3@PR]./0P1R2^_./0\rP1R2`P315Q@!@`@!"#\rabR1`@`?h='L=?-d=0.45A,\re10Q\rab./0P1R2`@`?"=g-=hi=0-3j\rkR2150\r@!"#?P=UX(h+l2)=4.5VX(0.45A+0.3A)=3.375W`\r(3)SS3SiS,R ?L]./0P1R2l_@mno./0P1R?p\rq@m\r ?`L\@`?1L=E^~=^^~=0.5j\r'UL3V\rv ?L\@`IL=0.5A,@`nwx003A,./0P1yz“15Q1A”{|\r}~$%&@'()*`+,-@N@`I=1L=0.5A,./0P1R?P3,\r€@!@P?R=?L=h=9\rI0.5A\r./0P1R2P3?R?=R-RL=9Q-6Q=3Q`\rv@mnwx003V,}~$%&@'()*`+,-./0P1pq@m5=3V\r./0P1P3\r@N@`?I=…11="†d=0.25A,\rRL6Q\r./0P1R2P3?R2=‡ˆ=/?=12Q,\rI°25A\r‹…}Œ./0P1`P3453Q-12Q\rNOPQRSTUV0635