ÌâÄ¿ÄÚÈÝ
ÏÖÒª²â¶¨Ò»¸ö¶î¶¨µçѹ4.2V£¬¶î¶¨¹¦ÂÊ1.5WµÄСµÆÅݵķü°²ÌØÐÔÇúÏß¡£ÏÖÓÐÆ÷²Ä£ºÖ±Á÷µçÔ´E£¨µç¶¯ÊÆ4£®5V£¬ÄÚ×è²»¼Æ£©£»µçѹ±í£¨Á¿³Ì4£®5V£¬ÄÚ×èÔ¼4¡Ál04¦¸£©£»µçÁ÷±íA1£¨Á¿³Ì250mA£¬ÄÚ×èԼΪ2¦¸£©£»µçÁ÷±íA2£¨Á¿³Ì400mA£¬ÄÚ×èԼΪ1¦¸£©£»»¬¶¯½»×èÆ÷£¨×î´ó×èÖµÔ¼10¦¸£©£¬µç¼üS£¬µ¼ÏßÈô¸É¡£
СÌâ1:Èç¹û¼ÈÒªÂú×ã²âÁ¿ÒªÇó£¬ÓÖÒª²âÁ¿Îó²î½ÏС£¬Ó¦¸ÃÑ¡ÓõĵçÁ÷±íÊÇ____£»
СÌâ2:ÔÚ¿Õ¸ñÄÚÉè¼Æ³öʵÑéµç·ͼ£¬ÒªÇóµç·ͼ¼ÈÒªÂú×ã²âÁ¿ÒªÇó¡¢ÓÖÒªÎó²î½ÏС£»
СÌâ3:½áºÏʵÑéÖÐËùÃèÊöµÄͼÏó£¬ PµãСµÆÅݵĵ繦ÂÊΪ ¡£![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412552127313230.jpg)
СÌâ1:Èç¹û¼ÈÒªÂú×ã²âÁ¿ÒªÇó£¬ÓÖÒª²âÁ¿Îó²î½ÏС£¬Ó¦¸ÃÑ¡ÓõĵçÁ÷±íÊÇ____£»
СÌâ2:ÔÚ¿Õ¸ñÄÚÉè¼Æ³öʵÑéµç·ͼ£¬ÒªÇóµç·ͼ¼ÈÒªÂú×ã²âÁ¿ÒªÇó¡¢ÓÖÒªÎó²î½ÏС£»
СÌâ3:½áºÏʵÑéÖÐËùÃèÊöµÄͼÏó£¬ PµãСµÆÅݵĵ繦ÂÊΪ ¡£
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/2014082412552127313230.jpg)
СÌâ1:A2
СÌâ2:ÈçͼËùʾ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408241255213044225.jpg)
СÌâ3:0.9W
¶î¶¨µçѹ4.2V£¬¶î¶¨¹¦ÂÊ1.5WµÄСµÆÅݵĶµçÁ÷ΪI=P/U=0.357A=357mA£¬ËùÒÔµçÁ÷±íÐèҪѡÔñÁ¿³ÌΪ400mAµÄµçÁ÷±íA2¡£Ãè»æСµÆÅݵķü°²ÌØÐÔÇúÏßÓ¦¸ÃÉè¼ÆΪ·Öѹµç·£¬ÓÉÓÚСµÆÅݵç×è²»´ó£¬²ÉÓõçÁ÷±íÍâ½Ó¡£PµãСµÆÅݵĵ繦ÂÊΪP=UI=3.0¡Á0.3W=0.9W¡£
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿