第六章 电功率测试卷-2020-2021学年九年级上册初三物理【夺冠百分百】优化测试卷（教科版）

书书书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`=Ma $&"0!* # + ! ! #$ " Z ! ! #% " Q ! ! #& " %# ! $1$ * " ! ! #' " %# ! $ * 1$ " ! 1234 " !23 ! "23 #& 7bc)%*+,-./0d: ! TUeW7bd :e12 $& ./0d: ! 54 %24 ! &24 ! '23 ! (24 ! )24 !*2 fg ! =h !!&"&!0!* ( ! %&#( !"24 ! !#&$&"0!* # ! ij ! !$&3 !%& ! ! " LM ! ! " " E=`kl ! ! # " S !&& ! ! " $*/ ! ! " " (&$0!* & + !'& ! ! " $&"0!* # + ! ! " " "&!0!* # + $! , - # / " ! 565789 " ! :; ! " 5 ! ! :; " " 4 ! ! :; # " 6 ! ! :; $ " 4 ! :; % " 4 !"# ! $%&'()*+<=. !26 ! "26 ! #23 ! $25 ! %25 ! &24 ! '24 ! (25 ! )23 !*26 ! !!253 ! !"2536 !#2 -@ ! =>? !$2"2!0!* % !%2 TU ! A; !&2 -@ ! =>? ! m=n !'2 DR ! $2"0!* # ! %; !(2)2&&0!* & ! !** !)2' ! R "*2 ! ! " opq ! r7st ! " " " uv[w # S !$ %xy "!2 ! ! " ' ! ! " " ( ! ! # " "* ! $* ! $* ! ! $ " TU ! Fz ! DE ""2 ! ! " &2'"0!* % + ! ! " " $2"0!* % + "#2 ! ! " &2#0!* ' + ! " " {|} >? #! ! " !"#$%& # ".%# ! $ * 1$ " .$2"0!* # + $! , - % / " 0!***, - 0 ! %%/1$*/ " .&2#0!* ' + & ! " " '%&() # ".%# ! $ *+ ' ',!$-%. % /0 ' 12345& ! $ 678 ' 9:;&$!"# $%&/< & "$2 > #! ! " ~����^� (#&/ `����K��� kl % ��=�� % TUx& % [� % ~����`� T $.(#&/ % 0���c���\]`=M & " ~\ .% ~�� # ~�� ! $1$ * " .*2$"0!* # + $! , - # / " 0 !, - 0 ! (#&/1"*/ " .#2$"'"0!* % + ' ! " " ��K�`�����_^� "* / `S�� � % �����S���&`TU % �� $) % 0� & " S\ ." ~��^ %   % S # S ! $)1$ * 7 " .% ~�� # ~�� ! $1$7 "% ¡�¢£ & $2"0!* # + $! , - # / " 0%, - 0 ! $71"*/ " . *2$"0!* # + $! , - # / " 0!, - 0 ! (#&/1$7 "% |¤ & $7.#&/ ' !@# ! ABCDEFG<=. !25 ! "24 ! #23 ! $26 ! %23 ! &23 ! '24 !