ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Ð¡¾ü¼ÒÀïÓÐÒ»¿î¸ß¡¢µÍÎÂÁ½µµµç¿¾Â¯£¬Ëû²é¿´Ê¹ÓÃ˵Ã÷Ê飬ÊÕ¼¯µ½Ò»Ð©ÐÅÏ¢ÈçÏ£º¶î¶¨µçѹ220V£¬µÍεµµç¹¦ÂÊ880W£¬¸ßεµµç¹¦ÂÊ1980W£¬µç·ÔÀíͼÈçͼËùʾ£¬R1£¬R2´ú±íÁ½¸ùµçÈÈË¿£¬S2Ϊοؿª¹Ø£¬¸ù¾ÝÉÏÊöÐÅÏ¢£¬½â´ðÏÂÁÐÎÊÌ⣺
£¨1£©ÔÚ¸ßεµÕý³£¹¤×÷ʱ£¬µç·µÄ×ܵçÁ÷¶à´ó£¿
£¨2£©ÔÚµÍεµÕý³£¹¤×÷1hÏûºÄ¶àÉٶȵçÄÜ£¿µçÈÈË¿R1µÄµç×è¶à´ó£¿
£¨3£©ÈôµçÈÈË¿R2ÉÕ»ÙÁË£¬ÒªÊ¹µç·»Ö¸´Õý³£¹¤×÷£¬Ð¡¾üÓÃÁ½¸ù¡°220V550W¡±µÄÏàͬµçÈÈË¿Ìæ´úR2£¬ÄãÈÏΪС¾üµÄ×ö·¨ÄÜ·ñÂú×ãÒªÇó£¨ÇëÄãÓüÆËã½á¹û»Ø´ð£©£¬²¢ÔÚÈçͼµÄµç·Öн«Á½¸ùµçÈÈË¿½ÓÈëµç·¡£
¡¾´ð°¸¡¿£¨1£©9A£»£¨2£©0.88£» 55¦¸£»£¨3£©ÄÜ
¡¾½âÎö¡¿
£¨1£©ÔÚ¸ßεµÕý³£¹¤×÷ʱµÄ¹¦ÂʺͶ¹¦ÂÊÏàµÈ£¬¸ù¾ÝP=UIÇó³öµç·µÄ×ܵçÁ÷£»
£¨2£©¸ù¾ÝW=PtÇó³öÔÚµÍεµÕý³£¹¤×÷1hÏûºÄµÄµçÄÜ£¬Óɵç·ͼ¿ÉÖª£¬¿ª¹ØS1±ÕºÏ¡¢S2¶Ï¿ªÊ±£¬µç·ΪR1µÄ¼òµ¥µç·£¬µç·ÖеÄ×ܵç×è×î´ó£¬¸ù¾ÝP=UI=¿ÉÖª£¬µç·ÖеÄ×ܹ¦ÂÊ×îС£¬µç¿¾Ïä´¦ÓÚµÍεµ£¬ÀûÓÃP=UI=Çó³öµçÈÈË¿R1µÄµç×裻
£¨3£©Óɵç·ͼ¿ÉÖª£¬¿ª¹ØS1¡¢S2±ÕºÏʱ£¬R1ÓëR2²¢Áª£¬µç·ÖеÄ×ܵç×è×îС£¬µç·µÄ×ܹ¦ÂÊ×î´ó£¬µç¿¾Ïä´¦ÓÚ¸ßεµ£¬¸ßεµµÄ¹¦ÂʼõÈ¥µÍεµµÄ¹¦Âʼ´ÎªR2µÄµç¹¦ÂÊ£¬¸ù¾Ý²¢Áªµç·µÄµçѹÌصãºÍP=UI=Çó³öR2µÄ×èÖµÀûÓõç×èµÄ²¢ÁªÇó³öÁ½µçÈÈË¿µÄ×ܵç×裬ȻºóÓëR2Ïà±È½ÏµÃ³ö´ð°¸£®
(1)ÓÉP=UI¿ÉµÃ£¬ÔÚ¸ßεµÕý³£¹¤×÷ʱµç·µÄ×ܵçÁ÷£ºI===9A£»
(2)ÓÉP=¿ÉµÃ£¬ÔÚµÍεµÕý³£¹¤×÷1hÏûºÄµÄµçÄÜ£ºW=PµÍÎÂt=880¡Á103kW¡Á1h=0.88kWh=0.88¶È£»Óɵç·ͼ¿ÉÖª,¿ª¹ØS1±ÕºÏ¡¢S2¶Ï¿ªÊ±,µç·ΪR1µÄ¼òµ¥µç·,µç·ÖеÄ×ܵç×è×î´ó(´óÓÚ²¢ÁªÊ±µÄ×ܵç×è)£¬ÓÉP=UI=¿ÉÖª£¬µç·ÖеÄ×ܹ¦ÂÊ×îС£¬µç¿¾Â¯´¦ÓÚµÍεµ£¬ÔòµçÈÈË¿R1µÄµç×裺R1===55¦¸£»
(3)Óɵç·ͼ¿ÉÖª,¿ª¹ØS1¡¢S2±ÕºÏʱ,R1ÓëR2²¢Áª£¬µç·ÖеÄ×ܵç×è×îС£¬µç·µÄ×ܹ¦ÂÊ×î´ó£¬µç¿¾Â¯´¦ÓÚ¸ßεµ£¬Òòµç·ÖÐ×ܹ¦ÂʵÈÓÚ¸÷ÓõçÆ÷¹¦ÂÊÖ®ºÍ£¬ËùÒÔ,R2µÄµç¹¦ÂÊ£º
P2=P¸ßÎÂPµÍÎÂ=1980W880W=1100W£¬Òò²¢Áªµç·Öи÷֧·Á½¶ËµÄµçѹÏàµÈ£¬ËùÒÔ,R2µÄ×èÖµ£ºR2===44¦¸£¬Òò²¢Áªµç·ÖÐ×ܵç×èµÄµ¹ÊýµÈÓÚ¸÷·Öµç×èµ¹ÊýÖ®ºÍ£¬ËùÒÔ£¬Á½¸ù88¦¸µÄÏàͬµçÈÈË¿²¢ÁªÊ±µÄ×ܵç×裺R²¢==44¦¸£¬ÒòR²¢=R2£¬ËùÒÔ£¬Ð¡¾üµÄ×ö·¨ÄÜÂú×ãÒªÇó¡£
´ð£º(1)ÔÚ¸ßεµÕý³£¹¤×÷ʱ£¬µç·µÄ×ܵçÁ÷Ϊ9A£»
(2)ÔÚµÍεµÕý³£¹¤×÷1 hÏûºÄ0.88¶ÈµçÄÜ,µçÈÈË¿R1µÄµç×èΪ55¦¸£»
(3)С¾üµÄ×ö·¨ÄÜÂú×ãÒªÇó¡£