ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Èçͼ1ËùʾΪһ¸ö¶àÁ¿³Ìµçѹ±íµÄµç·£¬Æä±íͷΪ¶¯È¦Ê½Ö±Á÷µçÁ÷¼Æ£¬Á¿³ÌIg=10mA¡¢ÄÚ×èRg=200¦¸£¬R1¡¢R2Ϊ¿Éµ÷µç×è¡£
£¨1£©¿Éµ÷µç×èÓ¦µ÷ΪR1= ______¦¸£»
£¨2£©ÏÖ·¢ÏÖ±íÍ·µçÁ÷¼ÆÒÑÉÕ»µ£¬ÎÒÃÇÒªÐÞ¸´¸Ãµçѹ±í£¬ÊÖ±ßÖ»ÓÐÒ»¸ö¡°Á¿³ÌΪ2mA¡¢ÄÚ×èΪ40¦¸¡±µÄµçÁ÷¼ÆG2ºÍÒ»¸öµç×èΪ10¦¸µÄ¶¨Öµµç×èR3¡£ÒªÊ¹ÐÞ¸´ºóµçѹ±íµÄÂúÆ«µçÁ÷ÈÔΪ10mA£¬ÇëÔÚͼ2Ðé¿òÄÚ»³ö¸Ãµçѹ±íµÄÐÞ¸´µç·___¡£
£¨3£©ÐÞ¸´ºóµÄµç·ÖУ¬¿Éµ÷µç×èR2Ó¦µ÷Ϊ R2=______¦¸£»
£¨4£©½Ó×ÅÓÃͼ3µÄµç·¶ÔÐÞ¸´µçѹ±íµÄ3VÁ¿³Ì±í½øÐÐУ¶Ô,V0Ϊ±ê×¼µçѹ±í¡¢V1ΪÐÞ¸´µçѹ±í¡£·¢ÏÖÐÞ¸´µçѹ±íV1µÄ¶ÁÊýʼÖձȱê×¼µçѹ±íV0ÂÔ´ó¡£Ó¦ÓÃÒÔÏÂÄÄÖÖ·½·¨½øÐÐ΢µ÷______¡£
A£®°ÑR1ÂÔ΢µ÷С B£®°ÑR1ÂÔ΢µ÷´ó
¡¾´ð°¸¡¿100 1200 B
¡¾½âÎö¡¿
£¨1£©¸ù¾Ý´®Áªµç×èÌصã½áºÏÅ·Ä·¶¨Âɿɵãº
£¨2£©£©¡°Á¿³ÌΪ2mA¡¢ÄÚ×èΪ40¦¸¡±¸Ä×°³É10mAµçÁ÷±í£¬Ó¦²¢Áª¶¨Öµµç×è·ÖÁ÷£¬¾Ý´Ë»³ö¸Ä×°µç·ͼÈçͼËùʾ
£»
£¨3£©ÓÉ´®Áªµç×èÌصã½áºÏÅ·Ä·¶¨ÂɿɵÃ
ÔòR2¡ä=1492-292¦¸=1200¦¸.
£¨4£©¸ù¾Ýµçѹ±í¸Ä×°ÔÀí¿ÉµÃ´®ÁªµÄµç×è×èÖµ£¬µçѹ±íʾÊýÆ«´ó£¬ËµÃ÷R̫С£¬ÔòµçÁ÷±íÄÚ×è²âÁ¿ÖµÆ«´ó¡£Ó¦Ôö´óµç×èÏäµÄ×èÖµ£»¹ÊA´íÎó£¬BÕýÈ·¡£