ÌâÄ¿ÄÚÈÝ
ÔÚ¡°²âÁ¿¶î¶¨µçѹΪ2.5VСµÆÅݵŦÂÊ¡°µÄʵÑéÖУ®
£¨1£©±ÕºÏ¿ª¹ØÇ°£¬»¬¶¯±ä×èÆ÷µÄ»¬Æ¬Ó¦¸ÃλÓÚ
Èçͼ1£¬±ÕºÏ¿ª¹Øºó£¬µçѹ±íÖ¸ÕëÈçͼ1Ëùʾ£¬Îª²â³ö2.5VСµÆÅÝÕý³£·¢¹âʱµÄ¹¦ÂÊ£¬»¬¶¯±ä×èÆ÷µÄ»¬Æ¬Ó¦¸ÃÏò
£¨2£©ÊµÑé¹ý³ÌÖУ¬Ð¡Ã÷½«»¬Æ¬PÏò×󲻶ÏÒƶ¯£¬ÔòµçÁ÷±íµÄʾÊý
£¨3£©ÔÚÍê³ÉÒÔÉÏʵÑéºó£¬Ð¡Ã÷½øÒ»²½²âÁ¿²¢Ãè»æ³öСµÆÅݵĵçÁ÷Ëæµçѹ±ä»¯µÄÇúÏßÈçͼ2Ëùʾ£¬ÔòСµÆÅÝÕý³£·¢¹âʱͨ¹ýµÄµçÁ÷Ϊ
£¨4£©Ð¡Ã÷½øÒ»²½·ÖÎöͼÏó·¢ÏÖµÆË¿µÄµç×èÊDZ仯µÄ£¬ÕâÊÇÒòΪµ¼ÌåµÄµç×èËæ
£¨1£©±ÕºÏ¿ª¹ØÇ°£¬»¬¶¯±ä×èÆ÷µÄ»¬Æ¬Ó¦¸ÃλÓÚ
B
B
¶Ë£¨Ñ¡Ìî¡°A¡±»ò¡°B¡±£©£¬ÕâÑù×öÊÇΪÁ˱£»¤µç·
±£»¤µç·
£»Èçͼ1£¬±ÕºÏ¿ª¹Øºó£¬µçѹ±íÖ¸ÕëÈçͼ1Ëùʾ£¬Îª²â³ö2.5VСµÆÅÝÕý³£·¢¹âʱµÄ¹¦ÂÊ£¬»¬¶¯±ä×èÆ÷µÄ»¬Æ¬Ó¦¸ÃÏò
B
B
¶ËÒƶ¯£¨Ñ¡Ìî¡°A¡±»ò¡°B¡±£©£¨2£©ÊµÑé¹ý³ÌÖУ¬Ð¡Ã÷½«»¬Æ¬PÏò×󲻶ÏÒƶ¯£¬ÔòµçÁ÷±íµÄʾÊý
Ôö´ó
Ôö´ó
£¬Ð¡µÆÅÝÏûºÄµÄµç¹¦ÂÊÔö´ó
Ôö´ó
£¨¾ùÑ¡Ìî¡°Ôö´ó¡±¡¢¡°²»±ä¡±»ò¡°¼õС¡±£©£®£¨3£©ÔÚÍê³ÉÒÔÉÏʵÑéºó£¬Ð¡Ã÷½øÒ»²½²âÁ¿²¢Ãè»æ³öСµÆÅݵĵçÁ÷Ëæµçѹ±ä»¯µÄÇúÏßÈçͼ2Ëùʾ£¬ÔòСµÆÅÝÕý³£·¢¹âʱͨ¹ýµÄµçÁ÷Ϊ
0.25
0.25
A£¬µç×èΪ10
10
¦¸£¬µÆÅݵĶ¹¦ÂÊΪ0.625
0.625
W£®£¨4£©Ð¡Ã÷½øÒ»²½·ÖÎöͼÏó·¢ÏÖµÆË¿µÄµç×èÊDZ仯µÄ£¬ÕâÊÇÒòΪµ¼ÌåµÄµç×èËæ
ζÈ
ζÈ
µÄ±ä»¯¶ø±ä»¯£®·ÖÎö£º£¨1£©»¬¶¯±ä×èÆ÷µÄ×÷ÓÃÖ®Ò»ÊDZ£»¤µç·£¬±ÕºÏ¿ª¹ØÇ°Ó¦¸Ãʹ»¬¶¯±ä×èÆ÷»¬Æ¬Î»ÓÚ×î´ó×èÖµ´¦£»ÒªÊ¹µÆÅÝÕý³£·¢¹â£¬Á½¶Ëµçѹ±ØÐë´ïµ½¶î¶¨µçѹ£¬»¬Æ¬Òƶ¯¸ù¾Ý´®Áªµç·µçѹÓëµç×è³ÉÕý±È·ÖÎö£»
£¨2£©ÔÚµçѹһ¶¨Ê±£¬Í¨¹ýµ¼ÌåµÄµçÁ÷Óëµç×è³É·´±È£»µÆÅÝÏûºÄµÄ¹¦ÂÊÀûÓù«Ê½P=UI·ÖÎö£»
£¨3£©µÆÅÝÔڶµçѹÏÂÕý³£·¢¹â£¬´ËʱµÄµçÁ÷¸ù¾Ý¶î¶¨µçѹȷ¶¨£»ÒÑÖªµÆÅݶµçѹºÍÕý³£¹¤×÷µçÁ÷£¬ÀûÓù«Ê½R=
µÃµ½µÆË¿µç×裬ÀûÓù«Ê½P=UIµÃµ½¶î¶¨¹¦ÂÊ£»
£¨4£©µç×èÊǵ¼Ìå±¾ÉíµÄÒ»ÖÖÐÔÖÊ£¬Óë²ÄÁÏ¡¢³¤¶È¡¢ºá½ØÃæ»ýºÍζÈÓйأ®
£¨2£©ÔÚµçѹһ¶¨Ê±£¬Í¨¹ýµ¼ÌåµÄµçÁ÷Óëµç×è³É·´±È£»µÆÅÝÏûºÄµÄ¹¦ÂÊÀûÓù«Ê½P=UI·ÖÎö£»
£¨3£©µÆÅÝÔڶµçѹÏÂÕý³£·¢¹â£¬´ËʱµÄµçÁ÷¸ù¾Ý¶î¶¨µçѹȷ¶¨£»ÒÑÖªµÆÅݶµçѹºÍÕý³£¹¤×÷µçÁ÷£¬ÀûÓù«Ê½R=
U |
I |
£¨4£©µç×èÊǵ¼Ìå±¾ÉíµÄÒ»ÖÖÐÔÖÊ£¬Óë²ÄÁÏ¡¢³¤¶È¡¢ºá½ØÃæ»ýºÍζÈÓйأ®
½â´ð£º½â£º
£¨1£©ÔÚ»¬¶¯±ä×èÆ÷ÉÏ£¬»¬Æ¬¾àÀëÏÂÃæ½ÓÈëµç·µÄ½ÓÏßÖùÔ½Ô¶½ÓÈëµç·µç×èÔ½´ó£¬ËùÒÔ»¬Æ¬Ó¦¸ÃλÓÚB¶Ë£¬Ä¿µÄÊDZ£»¤µç·£»
ÒÑÖªµÆÅݶµçѹΪ2.5V£¬ÓÉͼ֪µÆÅÝÁ½¶Ëµçѹ´óÓÚ2.5V£¬ÒªÊ¹µÆÅÝ´ïµ½¶î¶¨µçѹ£¬Á½¶ËµçѹÐèÒª½µµÍ£¬ÔÚµçÔ´µçѹһ¶¨Ê±£¬Éý¸ß»¬¶¯±ä×èÆ÷Á½¶Ëµçѹ£»ÒòΪ´®Áªµç·ÓõçÆ÷Á½¶ËµçѹÓëÆä×èÖµ³ÉÕý±È£¬ËùÒÔ»¬¶¯±ä×èÆ÷½ÓÈëµç·µç×èÒªÔö´ó£¬¼´»¬Æ¬ÏòB¶Ë»¬¶¯£»
¹Ê´ð°¸Îª£ºB£»±£»¤µç·£»B£®
£¨2£©ÓÉͼ֪£¬»¬Æ¬Ïò×óÒƶ¯¹ý³ÌÖУ¬»¬¶¯±ä×èÆ÷½ÓÈëµç·µç×è¼õС£¬µç·×ܵç×è¼õС£¬¶øµçÔ´µçѹ²»±ä£¬Óɹ«Ê½I=
Öª£ºµç·µçÁ÷Ôö´ó£»
µçÔ´µçѹ²»±ä£¬µç·µçÁ÷Ôö´ó£¬Óɹ«Ê½P=UIÖª£ºµÆÅÝÏûºÄµÄ¹¦ÂÊÔö´ó£»
¹Ê´ð°¸Îª£ºÔö´ó£»Ôö´ó£»
£¨3£©ÓÉͼÏóÖª£ºµ±µÆÅÝÁ½¶ËµçѹΪ2.5VÕý³£·¢¹âʱ£¬Í¨¹ýµÆÅݵĵçÁ÷Ϊ0.25A£»
µÆÅݵç×èΪR=
=
=10¦¸£»
µÆÅݵĶ¹¦ÂÊΪP¶î=U¶îI=2.5V¡Á0.25A=0.625W£»
¹Ê´ð°¸Îª£º0.25£»10£»0.625W£»
£¨4£©ÔÚ²ÄÁÏ¡¢³¤¶ÈºÍºá½ØÃæ»ýÒ»¶¨Ê±£¬µÆË¿µç×軹ÓëζÈÓйأ®
¹Ê´ð°¸Îª£ºÎ¶ȣ®
£¨1£©ÔÚ»¬¶¯±ä×èÆ÷ÉÏ£¬»¬Æ¬¾àÀëÏÂÃæ½ÓÈëµç·µÄ½ÓÏßÖùÔ½Ô¶½ÓÈëµç·µç×èÔ½´ó£¬ËùÒÔ»¬Æ¬Ó¦¸ÃλÓÚB¶Ë£¬Ä¿µÄÊDZ£»¤µç·£»
ÒÑÖªµÆÅݶµçѹΪ2.5V£¬ÓÉͼ֪µÆÅÝÁ½¶Ëµçѹ´óÓÚ2.5V£¬ÒªÊ¹µÆÅÝ´ïµ½¶î¶¨µçѹ£¬Á½¶ËµçѹÐèÒª½µµÍ£¬ÔÚµçÔ´µçѹһ¶¨Ê±£¬Éý¸ß»¬¶¯±ä×èÆ÷Á½¶Ëµçѹ£»ÒòΪ´®Áªµç·ÓõçÆ÷Á½¶ËµçѹÓëÆä×èÖµ³ÉÕý±È£¬ËùÒÔ»¬¶¯±ä×èÆ÷½ÓÈëµç·µç×èÒªÔö´ó£¬¼´»¬Æ¬ÏòB¶Ë»¬¶¯£»
¹Ê´ð°¸Îª£ºB£»±£»¤µç·£»B£®
£¨2£©ÓÉͼ֪£¬»¬Æ¬Ïò×óÒƶ¯¹ý³ÌÖУ¬»¬¶¯±ä×èÆ÷½ÓÈëµç·µç×è¼õС£¬µç·×ܵç×è¼õС£¬¶øµçÔ´µçѹ²»±ä£¬Óɹ«Ê½I=
U |
R |
µçÔ´µçѹ²»±ä£¬µç·µçÁ÷Ôö´ó£¬Óɹ«Ê½P=UIÖª£ºµÆÅÝÏûºÄµÄ¹¦ÂÊÔö´ó£»
¹Ê´ð°¸Îª£ºÔö´ó£»Ôö´ó£»
£¨3£©ÓÉͼÏóÖª£ºµ±µÆÅÝÁ½¶ËµçѹΪ2.5VÕý³£·¢¹âʱ£¬Í¨¹ýµÆÅݵĵçÁ÷Ϊ0.25A£»
µÆÅݵç×èΪR=
U |
I |
2.5V |
0.25A |
µÆÅݵĶ¹¦ÂÊΪP¶î=U¶îI=2.5V¡Á0.25A=0.625W£»
¹Ê´ð°¸Îª£º0.25£»10£»0.625W£»
£¨4£©ÔÚ²ÄÁÏ¡¢³¤¶ÈºÍºá½ØÃæ»ýÒ»¶¨Ê±£¬µÆË¿µç×軹ÓëζÈÓйأ®
¹Ê´ð°¸Îª£ºÎ¶ȣ®
µãÆÀ£º´ËÌ⿼²éÁË»¬¶¯±ä×èÆ÷µÄ×÷Óá¢Á¬½Ó·½·¨¡¢µÆÅݶ¹¦Âʺ͵ç×èµÄ²âÁ¿¼ÆËã·½·¨ÒÔ¼°Î¶ȶԵ¼Ìåµç×èµÄÓ°Ï죬֪ʶµã½Ï¶à£¬ÄѶÈÊÊÖУ®±¾ÊµÑéÊǵçѧ²¿·Ö×îÖØÒªµÄʵÑéÖ®Ò»£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿