ÌâÄ¿ÄÚÈÝ
ÈçͼÊDzâÁ¿×èÖµÔ¼¼¸Ê®Å·µÄδ֪µç×èRxµÄÔÀíͼ£¬Í¼ÖÐR0ÊDZ£»¤µç×裨10¦¸£©£¬R1Êǵç×èÏ䣨0¡«99£®9¦¸£©£¬RÊÇ»¬¶¯±ä×èÆ÷£¬A1ºÍA2ÊǵçÁ÷±í£¬EÊǵçÔ´£¨µç¶¯ÊÆ10V£¬ÄÚ×èºÜС£©£®ÔÚ±£Ö¤°²È«ºÍÂú×ãÐèÇóµÄÇé¿öÏ£¬Ê¹²âÁ¿·¶Î§¾¡¿ÉÄÜ´ó£®ÊµÑé¾ßÌå²½ÖèÈçÏ£º
¢ÙÁ¬½ÓºÃµç·£¬½«»¬¶¯±ä×èÆ÷Rµ÷µ½×î´ó£»
¢Ú±ÕºÏS£¬´Ó×î´óÖµ¿ªÊ¼µ÷½Úµç×èÏäR1£¬Ïȵ÷ R1ΪÊʵ±Öµ£¬ÔÙµ÷½Ú»¬¶¯±ä×èÆ÷R£¬Ê¹A1ʾÊýI1=0£®15A£¬¼ÇÏ´Ëʱµç×èÏäµÄ×èÖµR1ºÍA2µÄʾÊýI2£»
¢ÛÖظ´²½Ö裨2£©£¬ÔÙ²âÁ¿6×éR1ºÍI2µÄÖµ£»
¢Ü½«ÊµÑé²âµÃµÄ7×éÊý¾ÝÔÚ×ø±êÖ½ÉÏÃèµã£¬µÃµ½ Èçͼ2ËùʾµÄͼÏó£®
¸ù¾ÝʵÑé»Ø´ðÒÔÏÂÎÊÌ⣺
£¨1£©ÏÖÓÐËÄÖ»¹©Ñ¡ÓõĵçÁ÷±í
A£®µçÁ÷±í£¨0¡«3mA£¬ÄÚ×èΪ 2£®0¦¸£©
B£®µçÁ÷±í£¨0¡«3mA£¬ÄÚ×èδ֪£©
C£®µçÁ÷±í£¨0¡«0£®3A£¬ÄÚ×èΪ 5£®0¦¸£©
D£®µçÁ÷±í£¨0¡«0£®3A£¬ÄÚ×èδ֪£©
A1ӦѡÓà £®A2ӦѡÓà £¨Ñ¡Ìî×Öĸ A¡¢B¡¢C¡¢D£©
£¨2£©²âµÃÒ»×éR1ºÍI2Öµºó£¬µ÷Õûµç×èÏäR1£¬Ê¹Æä×èÖµ±äС£¬ÒªÊ¹A1ʾÊýI1=0£®15A£¬Ó¦Èû¬¶¯±ä×èÆ÷R½ÓÈëµç·µÄ×èÖµ £¨Ñ¡Ìî¡°²»±ä¡±¡¢¡°±ä´ó¡±»ò¡°±äС¡±£©£®
£¨3£©¸ù¾ÝÒÔÉÏʵÑéµÃ³ö Rx= ¦¸£®£¨±£ÁôÁ½Î»ÓÐЧÊý×Ö£©