ÌâÄ¿ÄÚÈÝ
ÔÚ¡°²â¶¨½ðÊôµÄµç×èÂÊ¡±µÄʵÑéÖУ¬ÓÃÂÝÐý²â΢Æ÷²âÁ¿½ðÊôË¿Ö±¾¶Ê±µÄ¿Ì¶ÈλÖÃÈçͼËùʾ£¬ÓÃÃ׳߲âÁ¿½ðÊôË¿µÄ³¤¶Èl=1.010m£®½ðÊôË¿µÄµç×è´óԼΪ4¦¸£®ÏÈÓ÷ü°²·¨²â³ö½ðÊôË¿µÄµç×裬Ȼºó¸ù¾Ýµç×趨ÂɼÆËã³ö¸Ã½ðÊô²ÄÁϵĵç×èÂÊ£®½ðÊôË¿µÄÖ±¾¶Îª0.52mm£®
£¨1£©ÔÚÓ÷ü°²·¨²â¶¨½ðÊôË¿µÄµç×èʱ£¬³ý±»²âµÄµç×èË¿Í⣬»¹ÓÐ
ÈçϹ©Ñ¡ÔñµÄʵÑéÆ÷²Ä£º
Ö±Á÷µçÔ´£ºµç¶¯ÊÆÔ¼4.5V£¬ÄÚ×èºÜС£»
µçÁ÷±íA1£ºÁ¿³Ì0¡«0.6A£¬ÄÚ×è0.125¦¸£»
µçÁ÷±íA2£ºÁ¿³Ì0¡«3.0A£¬ÄÚ×è0.025¦¸£»
µçѹ±íV£ºÁ¿³Ì0¡«3V£¬ÄÚ×è3k¦¸£»
»¬¶¯±ä×èÆ÷R1£º×î´ó×èÖµ10¦¸£»
»¬¶¯±ä×èÆ÷R2£º×î´ó×èÖµ50¦¸£»
¿ª¹Ø¡¢µ¼Ïߵȣ®
Ôڿɹ©Ñ¡ÔñµÄÆ÷²ÄÖУ¬Ó¦¸ÃÑ¡ÓõĵçÁ÷±íÊÇ
£¨2£©¸ù¾ÝËùÑ¡µÄÆ÷²Ä£¬ÔÚ·½¿òÖл³öʵÑéµç·ͼ£®
£¨3£©Èô¸ù¾Ý·ü°²·¨²â³öµç×èË¿µÄµç×èΪRx=4.2¦¸£¬ÔòÕâÖÖ½ðÊô²ÄÁϵĵç×èÂÊΪ
£¨1£©ÔÚÓ÷ü°²·¨²â¶¨½ðÊôË¿µÄµç×èʱ£¬³ý±»²âµÄµç×èË¿Í⣬»¹ÓÐ
ÈçϹ©Ñ¡ÔñµÄʵÑéÆ÷²Ä£º
Ö±Á÷µçÔ´£ºµç¶¯ÊÆÔ¼4.5V£¬ÄÚ×èºÜС£»
µçÁ÷±íA1£ºÁ¿³Ì0¡«0.6A£¬ÄÚ×è0.125¦¸£»
µçÁ÷±íA2£ºÁ¿³Ì0¡«3.0A£¬ÄÚ×è0.025¦¸£»
µçѹ±íV£ºÁ¿³Ì0¡«3V£¬ÄÚ×è3k¦¸£»
»¬¶¯±ä×èÆ÷R1£º×î´ó×èÖµ10¦¸£»
»¬¶¯±ä×èÆ÷R2£º×î´ó×èÖµ50¦¸£»
¿ª¹Ø¡¢µ¼Ïߵȣ®
Ôڿɹ©Ñ¡ÔñµÄÆ÷²ÄÖУ¬Ó¦¸ÃÑ¡ÓõĵçÁ÷±íÊÇ
A1
A1
£¬Ó¦¸ÃÑ¡ÓõĻ¬¶¯±ä×èÆ÷ÊÇR1
R1
£®£¨2£©¸ù¾ÝËùÑ¡µÄÆ÷²Ä£¬ÔÚ·½¿òÖл³öʵÑéµç·ͼ£®
£¨3£©Èô¸ù¾Ý·ü°²·¨²â³öµç×èË¿µÄµç×èΪRx=4.2¦¸£¬ÔòÕâÖÖ½ðÊô²ÄÁϵĵç×èÂÊΪ
8.8¡Á10-7
8.8¡Á10-7
¦¸?m£®£¨±£Áô¶þλÓÐЧÊý×Ö£©£®·ÖÎö£º£¨1£©¸ù¾Ýµç·×î´óµçÁ÷Ñ¡ÔñµçÁ÷±í£¬¸ù¾ÝµçÔ´µç¶¯ÊÆ¡¢´ý²âµç×è×èÖµÓëËùÑ¡µçÁ÷±íÑ¡Ôñ»¬¶¯±ä×èÆ÷£®
£¨2£©¸ù¾ÝʵÑéÆ÷²ÄÈ·¶¨»¬¶¯±ä×èÆ÷½Ó·¨£¬¸ù¾Ý´ý²âµç×è×èÖµÓëµç±íÄÚ×è¹Øϵȷ¶¨µçÁ÷±í½Ó·¨£¬×÷³öµç·ͼ£®
£¨3£©¸ù¾Ýµç×趨ÂÉÇó³ö½ðÊôË¿µÄµç×èÂÊ£®
£¨2£©¸ù¾ÝʵÑéÆ÷²ÄÈ·¶¨»¬¶¯±ä×èÆ÷½Ó·¨£¬¸ù¾Ý´ý²âµç×è×èÖµÓëµç±íÄÚ×è¹Øϵȷ¶¨µçÁ÷±í½Ó·¨£¬×÷³öµç·ͼ£®
£¨3£©¸ù¾Ýµç×趨ÂÉÇó³ö½ðÊôË¿µÄµç×èÂÊ£®
½â´ð£º½â£º£¨1£©Îª¼õС¶ÁÊýÎó²î£¬Ñ¡Ð¡Á¿³ÌµçÁ÷±í£¬¹ÊÑ¡µçÁ÷±íA1£ºÁ¿³Ì0¡«0.6A£¬ÄÚ×è0.125¦¸£¬Îª±£Ö¤µç·°²È«£¬·½±ãʵÑé²Ù×÷£¬»¬¶¯±ä×èÆ÷ӦѡR1£º×î´ó×èÖµ10¦¸£»
£¨2£©Îª±£Ö¤µç·°²È«£¬»¬¶¯±ä×èÆ÷²ÉÓÃÏÞÁ÷½Ó·¨£¬ÓÉÌâÒâÖª£¬µçÁ÷±í²ÉÓÃÍâ½Ó·¨£¬ÊµÑéµç·ͼÈçͼËùʾ£»
£¨3£©Óɵç×趨ÂɵãºR=¦Ñ
=¦Ñ
£¬
µç×èÂʦÑ=
=
¡Ö8.8¡Á10-7¦¸?m£®
¹Ê´ð°¸Îª£º£¨1£©A1£»R1£»£¨2£©µç·ͼÈçͼËùʾ£»£¨3£©8.8¡Á10-7£®
£¨2£©Îª±£Ö¤µç·°²È«£¬»¬¶¯±ä×èÆ÷²ÉÓÃÏÞÁ÷½Ó·¨£¬ÓÉÌâÒâÖª£¬µçÁ÷±í²ÉÓÃÍâ½Ó·¨£¬ÊµÑéµç·ͼÈçͼËùʾ£»
£¨3£©Óɵç×趨ÂɵãºR=¦Ñ
L |
S |
L | ||
¦Ð(
|
µç×èÂʦÑ=
¦Ðd2R |
4L |
3.14¡Á(0.52¡Á10-3)2¡Á4.2 |
4¡Á1.010 |
¹Ê´ð°¸Îª£º£¨1£©A1£»R1£»£¨2£©µç·ͼÈçͼËùʾ£»£¨3£©8.8¡Á10-7£®
µãÆÀ£ºÉè¼ÆʵÑéµç·ʱ£¬Òª×¢Ò⻬¶¯±ä×èÆ÷ÓëµçÁ÷±íµÄ½Ó·¨£»Èô»¬¶¯±ä×èÆ÷²ÉÓÃÏÞÁ÷ʽʱÄÜÏÞסµçÁ÷£¬ÔòÓ¦ÓÃÏÞÁ÷ʽ£¬ÒòΪÏÞÁ÷ʽ²Ù×÷·½±ãÇÒ½ÚÄÜ£®Òò±¾ÌâÖеçÁ÷±íºÍµçѹ±íÄÚ×èÒ»¶¨£¬¿ÉÒÔ¾«È·²âÁ¿´ý²âµç×èÖµ£¬´ËʱÎÞËùνµçÁ÷±íÄÚÍâ½Ó·¨Ñ¡ÔñÁË£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿