ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Ð¡çøÓÃͼ¼×µÄµç·²âÁ¿¶î¶¨µçѹΪ2.5VµÄСµÆÅݵç×裬ͼÒÒÊÇδÍê³ÉÁ¬½ÓµÄʵÑéµç·¡£
£¨1£©ÇëÄã°´ÒªÇó£¬ÓñʻÏß´úÌæµ¼Ïߣ¬Íê³ÉͼÒÒÖÐʵÑéµç·µÄÁ´½Ó¡£ÒªÇ󻬶¯±ä×èÆ÷»¬Æ¬Ïò×óÒƶ¯Ê±£¬µçÁ÷±íʾÊýÔö´ó¡£
£¨2£©Ð¡çø°´ÒªÇóÕýÈ·Á¬½Óµç·ºó£¬±ÕºÏ¿ª¹Ø£¬·¢ÏÖµçѹ±íÖ¸Õëƫתµ½Âú¿Ì¶ÈµÄλÖá£ÆäÔÒò¿ÉÄÜÊÇ£º ¡££¨Ð´³öÒ»¸ö£©
£¨3£©µç·Õý³£ºó£¬Ð¡çø±ÕºÏ¿ª¹Ø£¬µ÷½Ú±ä×èÆ÷µÄ»¬Æ¬£¬Ê¹Ð¡µÆÅݸպÃÕý³£·¢¹â£¬´ËʱµçÁ÷±íµÄʾÊýÈçͼ±ûËùʾ£¬µçÁ÷±íµÄ¶ÁÊýÊÇ A£¬Ð¡µÆÅݵÄ×èÖµÊÇ ¦¸£¨Ð¡Êýµãºó±£Áôһ룩¡£
£¨3£©Ð¡çøÓÖÏë²âijδ֪µç×èRxµÄ×èÖµ£¬Éè¼ÆÁËÈçͼ¶¡Ëùʾµç·£¨RΪÒÑÖª×èÖµµÄ¶¨Öµµç×裩£¬²¢Éè¼ÆÁËÈçÏÂʵÑé²½Ö裬Çë°ïËû°ÑȱÉٵIJ½Ö貹ȫ£¬²¢Ð´³öRxµÄ±í´ïʽ¡£
ʵÑé²½Ö裺A.°´ÕÕÉè¼ÆµÄµç·ͼÁ¬½Óµç·£»
B.S¶Ï¿ªÊ±£¬¶Á³öµçÁ÷±íʾÊý¼Ç¼ΪI1£»
C.
±í´ïʽ£ºRx= £¨ÓÃÒÑÖªÎïÀíÁ¿ºÍ²âÁ¿³öÎïÀíÁ¿µÄ·ûºÅ±íʾ£©¡£
¡¾´ð°¸¡¿£¨1£©Èçͼ
£¨2£©Ð¡µÆÅݶÏ·ÁË£¨3£© 0.3£¬8.3£¨4£© S±ÕºÏʱ£¬¶Á³öµçÁ÷±íʾÊý¼Ç¼ΪI2,
¡¾½âÎö¡¿£¨1£©ÈçͼµçÔ´ÓÉÁ½½Ú¸Éµç³Ø´®Áª¶ø³É£¬µçÔ´µçѹΪ3V£¬ËùÒÔµçѹ±íÑ¡Ôñ0-3VµÄÁ¿³Ì£¬ÒªÇ󻬶¯±ä×èÆ÷»¬Æ¬Ïò×óÒƶ¯Ê±£¬µçÁ÷±íʾÊýÔö´ó£¬»¬¶¯±ä×èÆ÷µç×è¼õС£¬ËµÃ÷»¬¶¯±ä×èÆ÷½«»®Æ¬×ó±ßµç×èË¿½ÓÈëµç·£¬Ó¦½«»¬¶¯±ä×èÆ÷×ó±ßµÄϽÓÏßÖù½ÓÈëµç·¡£
£¨2£©±ÕºÏ¿ª¹Ø£¬Èçͼ±û£¬µçѹ±íµÄʾÊýΪ3V£¬ÎªµçÔ´µçѹ£¬ËµÃ÷¿ÉÄÜСµÆÅݶÏ·ÁË£¬»ò»¬¶¯±ä×èÆ÷¶Ì·ÁË
£¨3£©ÊµÑé²½Ö裺A.°´ÕÕÉè¼ÆµÄµç·ͼÁ¬½Óµç·£»
B.S¶Ï¿ªÊ±£¬¶Á³öµçÁ÷±íʾÊý¼Ç¼ΪI1£¬RÓëRX´®Áª£¬µçÔ´µçѹU=I1£¨R+RX£©;
C. S±ÕºÏʱ£¬¶Á³öµçÁ÷±íʾÊý¼Ç¼ΪI2£¬R±»¶Ì·£¬µçÔ´µçѹU=I2RX;
ÓÉÓÚµçÔ´µçѹ²»±ä£¬Ôò I2RX = I1£¨R+Rx£©£¬£¨I2- I1£©Rx= I1R£¬Rx=