15.1 两种电荷2019-2020学年九年级全册三物理【名师学案】(人教版)

!"#$%&'( )*)+ ,-./ "' !!! !"+$ ! ,-.,/ ! ! " ! EFGH ! 01234*56 ! 789:; ! """"""""""""""""""""""" " " " " " " " " " " " " " " " " " " " " " " " " " " " """""""""""""""""""""""" " " " " " " " " " " " " " " " " " " " " " " " " " " # ## # " ! # ���� !" rs-ç $ ] ! yz ! )t{d!_ ! {à ! % D Ers-ç # rs )�ç!_fö ! r=| F0+ ! # #" ÒPç÷ $ Íøù½a ! } ! Pç÷ # ]úû rs ) ! ~�� ! �)ç÷DEüç÷ % ]ý þrs ) ! ��� ! �)ç÷DEÿç÷ # $" ç÷L\]Rº $ ;Pç÷=> ! q? ! % !P ç÷=> ! r= ! # %" ç÷7 $ ! Ã�6�t ! % lm ! Ã� ! % ç÷ 7)45# ! �� ! % ��# ! % ! # ' # �9_��9 ." �Ðåç)!_DE ! �+ ! % � $ "ë " ! �+ ! " ! CY ! & ! �� ! & ! À^_�* ! w & :�Ðå ç)!_DE ! ��+ ! % � ! �� ! & ! ~� ! & ! �í ! w # $ 23456 $ ! ���� !" JK;L,EP`L¶½ & ¾ & � & �ýccP2U %�MÐ�'ÖN % WX½Uc*P % 4¤¾ & � & � �c2U;cP�'©�%�, # * $ &" � & * & * '" � & � & * (" * & � & � )" * & � & * #" ! #$ " =>? # POãÃÄP�� % POþc ! � ! P� " J{^POãecc�P�'Q02 UMÐ % 5M¼´þ_À ! q? ! # ;< ( 7T ) = ( aE )$" $" ! #$ " �� # JK % �Pè, Rá/m,×c ! à ! 'S è " EcPm\]�Pè'V AU % VAT¡þU! % ,%\ ¿cVATcg ! �� ! # ;< ( Á© ) = ( F© )$ P � % À_ ! q? ! # ;< ( 7T ) = ( aE %%%%%%%%%%%%%%%%%%%%%%%% & & & & & & & %%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % )$" !! c+,Z,-ê!4./0^_#T¸01 ! c+�W,-ê!4*^_/2¸01 " wt1^ê !4/0 $ Ü34t %" û^ê!4*/0 " �l/0 4tu�W5:!4 ! $ 23456 % ! �)�%I����$�� %" :&9#$Ì«':&Ô@Ô51Ô³I��' ! Ã" ! -. % :&Ô9 ! 1" ! @ ! R" ! -. % ËÌP&c ! � ! P % 0&c ! � ! P % Ì& ! W{ ! # ;< ( c ) = ( 6c )$ P " ." ! #$ " k�MN # ��fP�Øk,P&d/m¼ ´'.ü " ãPO��O'ÃÄPc*P % ,% \d��OâÌÃÄP ! Î� ! £P& # ;< ( = U ) = ( !b )$% PO%\=U£Èx'+�P&¥ c ! � ! P " 1" ! #$ " lk # ^Vaý'e5Wù % Î e5X7{Y.>+'ÖP % E÷Z' ò�kÖ![Ü! % STUJK;L' yz % ¨,%\VaPck£ ! �� ! P� % jkÀ_aE ! ûVaPcP' �0, ! Ã" ! d/m¼´¹º£ .ü %%%%%%%%%%%%%%%%%%%%%%%% & & & %%%%%%%%%%%%%%%%%%%%%%%% % % % " !! 67m0,¨"#0.,ö8 ! c+67,- ê!4/2¸01 " @A#��, ! $ 23456 & ! �9_��9 2" 2|\!£�]P¸Ì'{ öàãàw % JK;L % ಠ@àwW�ãÌA$çm' g ! ��"� ' ��� ' �� ' f��� ! % A$*^m'g ! ~�� ' ��"� ' ��� í� ' �í��ç� ' ~��  ¡ ' ~�¢ ! & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & & &