ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿ÔÚ²âÁ¿µç×èRXµÄʵÑéÖУ¬ÊµÑéÆ÷²ÄÓУº¸Éµç³Ø3½Ú£¬µçÁ÷±íÒ»¸ö£¬¿ª¹Ø2¸ö£¬ÒÑÖªµç×è×èֵΪR0µÄ¶¨Öµµç×èÒ»¸ö£¬µ¼ÏßÈô¸É£®
£¨1£©ÊµÑéʱ¼××éͬѧÀûÓÃÏÖÓÐʵÑéÆ÷²Ä²âÁ¿Î´Öªµç×èRXµÄ×èÖµ£¬ÈçͼËùʾËûÃÇ°´ÕÕÉè¼ÆÁ¬½ÓµÄ²¿·ÖʵÑéµç·
¢ÙÇëÄãÒÀ¾ÝÏÂÃæµÄʵÑé²½Ö裬ÓñʻÏß´úÌæµ¼Ïߣ¬½«ÊµÑéµç·Á¬½ÓÍêÕû.(Ö»Ìí¼ÓÒ»Ìõµ¼Ïß).
£¨____________£©
ʵÑé²½Öè:
A.¿ª¹ØS1ºÍS2¶¼¶Ï¿ª£¬¹Û²ìµ½µçÁ÷±íÎÞʾÊý;
B.Ö»±ÕºÏ¿ª¹ØS1ʱ£¬¶ÁÈ¡µçÁ÷±íµÄʾÊýΪI1;
C.ÔٱպϿª¹ØS2ʱ£¬¶ÁÈ¡µçÁ÷±íµÄʾÊýΪI2£¨I2>I1£©.
¢ÚÇëÄãÓÃI1¡¢I2ºÍR0±íʾRX£¬ÔòRX=________
£¨2£©ÊµÑéʱÒÒ×éͬѧÀûÓÃÏÖÓÐʵÑéÆ÷²Ä²âÁ¿Î´Öªµç×èRXµÄ×èÖµ£¬ÈçͼËùʾËûÃÇ°´ÕÕÉè¼ÆÁ¬½ÓµÄ²¿·ÖʵÑéµç·£®
¢ÙÇëÄãÒÀ¾ÝÏÂÃæµÄʵÑé²½Ö裬ÓñʻÏß´úÌæµ¼Ïߣ¬½«ÊµÑéµç·Á¬½ÓÍêÕû.(Ö»Ìí¼Ó1Ìõµ¼Ïß).
£¨____________£©
ʵÑé²½Öè:
A.¿ª¹ØS1ºÍS2¶¼¶Ï¿ª£¬¹Û²ìµ½µçÁ÷±íÎÞʾÊý;
B.Ö»±ÕºÏ¿ª¹ØS1ʱ£¬¶ÁÈ¡µçÁ÷±íµÄʾÊýΪI1;
C.ÔٱպϿª¹ØS2ʱ£¬¶ÁÈ¡µçÁ÷±íµÄʾÊýΪI2£¨I2>I1£©
¢ÚÇëÄãÓÃI1¡¢I2ºÍR0±íʾRX£¬ÔòRX=________
¡¾´ð°¸¡¿
¡¾½âÎö¡¿
(1)¢Ù[1]¸ù¾Ýͼʾ£¬¼ÓÒ»¸ùµ¼Ïߺó¿ÉÁ¬½ÓΪ²¢Áªµç·£¬Á½¿ª¹Ø¶¼±ÕºÏʱµç×è±äС£¬µçÁ÷±ä´ó£¬Èçͼ
¢Ú[2]Ö»±ÕºÏ¿ª¹ØS1ʱ£¬´ËʱֻÓÐRX½ÓÈëµç·£¬µçÔ´µçѹ
ÔٱպϿª¹ØS2ʱ£¬Á½µç×è²¢Áª£¬µçÁ÷±íµÄʾÊýΪI2£¬Ôòͨ¹ýR0µÄµçÁ÷Ϊ
I0=I2-I1£¬
²¢Áªµç·¸÷֧·Á½¶ËµÄµçѹÏàµÈ£¬ÓÐ
I1Rx=( I2-I1)R0
(2) ¢Ù[3]¸ù¾Ýͼʾ¿ÉÖª£¬¿ÉÒÔͨ¹ý½«µç×è¶Ï·£¬·Ö±ð²âµÃͨ¹ýµçÁ÷£¬µç·ͼÈçÏÂ
¢Ú[4]Ö»±ÕºÏ¿ª¹ØS1ʱ£¬Á½µç×è´®Áª£¬µç·Öеç×è½Ï´ó£¬µçÁ÷½ÏС£¬´ËʱµçÔ´µçѹ
ÔÙ±ÕºÏS2ʱ£¬µç×èRX±»¶Ì·£¬´ËʱµçÁ÷±ä´ó£¬µçÔ´µçѹ
ÁªÁ¢Á½Ê½¿ÉµÃ
¡¾ÌâÄ¿¡¿Ä³Ñ§Ï°Ð¡×éÔÚÒ»´ÎʵÑé̽¾¿ÖÐÀûÓõçѹ±íºÍµçÁ÷±í²âµÃÁ˶à×éÊý¾Ý£¬¼Ç¼ÈçÏÂ±í£®Çë¸ù¾Ý±íÖиø³öµÄÊý¾Ý£¬ÅжϷÖÎö³öËûÃÇʵÑéʱµÄµç·¿ÉÄÜÊÇͼÖеģ¨ £©
U/V | 3.0 | 2.5 | 2.0 | 1.8 | 1.5 | 1.3 |
I/A | 0.20 | 0.30 | 0.40 | 0.44 | 0.50 | 0.54 |
A.B.
C.D.