ÌâÄ¿ÄÚÈÝ
ÁÁÁÁÉè¼ÆÁËÒ»¸öÓõçѹ±íµÄʾÊý±ä»¯·´Ó³»·¾³Î¶ȱ仯µÄµç·£®Æäµç·ÔÀíͼÈçͼ£¨a£©Ëùʾ£®ÆäÖУ¬µçÔ´Á½¶Ëµçѹ U=4V£¨ºã¶¨²»±ä£©£®Êǵçѹ±í£®Á¿³ÌΪ 0¡«3V£¬R0ÊǶ¨Öµµç×裬R0=300¦¸£¬R1ÊÇÈÈÃôµç×裬Æäµç×èËæ»·¾³Î¶ȱ仯µÄ¹ØϵÈçͼ£¨b£©Ëùʾ£®±ÕºÏ¿ª¹ØSºó£®Çó£º
¢Ùµ±»·¾³Î¶ÈΪ40¡æʱ£¬ÈÈÃôµç×èR1µÄ×èÖµÊǶàÉÙ£¿
¢Úµ±»·¾³Î¶ÈΪ40¡æʱ£¬µçѹ±íµÄʾÊýÊǶàÉÙ£¿
¢Ûµçѹ±íÁ½¶Ëµçѹ²»Äܳ¬¹ýÆä×î´ó²âÁ¿Öµ£¬Ôò´Ëµç·ËùÔÊÐíµÄ×î¸ß»·¾³Î¶ÈÊǶàÉÙ£¿
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿