½â£º£¨1£©¶Ï¿ªS
1¡¢±ÕºÏS
2£¬µçµÆ±»¶Ì·£¬µç×èR
1ûÓнÓÈëµç·£¬Ö»Ó묶¯±ä×èÆ÷½ÓÈëµç·£¬µçѹ±í²âÁ¿»¬¶¯±ä×èÆ÷µÄµçѹ£¬Ò²ÊǵçÔ´µÄµçѹ£¬µçÔ´µçѹU=6V£¬»¬¶¯±ä×èÆ÷µÄ×î´ó×èÖµR
»¬=
=
=20¦¸£¬
»¬¶¯±ä×èÆ÷ÔÚ1minÄÚ²úÉúµÄÈÈÁ¿Q=U
»¬It=6V¡Á0.3A¡Á60s=108J£®
£¨2£©±ÕºÏS
1¡¢S
2£¬µç×èR
1¿ÉÒÔ½Óµ½µçÔ´ÉÏ£¬µçÁ÷±íA
1µÄʾÊýΪ0.10A£¬Êǵç×èR
1µÄµçÁ÷I
1£¬¹Êµç×èR
1µÄµç×èR
1=
=
=60¦¸£®
£¨3£©µçµÆµÄ¶î¶¨µçѹΪ2V£¬¶î¶¨¹¦ÂÊΪ1W£¬ÔòµçµÆµÄ¶î¶¨µçÁ÷I
µÆ=
=
=0.5A£¬µÆµÄµç×èR
µÆ=
=
=4¦¸£¬
¶Ï¿ªS
1¡¢S
2£¬»¬¶¯±ä×èÆ÷ÓëµçµÆ´®Áª£¬µçѹ±í²âÁ¿»¬¶¯±ä×èÆ÷µÄµçѹ£¬ÓÉÓÚÔÚ£¨1£©Öеĵçѹ±íµÄ¶ÁÊýΪ6V£¬¹Êµçѹ±íÓõÄÊÇ0-15VµÄÁ¿³Ì£¬×î´óµçѹ´óÓÚµçÔ´µçѹ£¬µçѹ±í²»»á³¬¹ýÁ¿³Ì£®¹ÊÓ¦´ÓµçÁ÷±íÓëµçµÆµÄÒòËØ¿¼ÂÇ£¬µçµÆµÄ¶î¶¨µçÁ÷Ϊ0.5A£¬¹Êµç·ÖеĵçÁ÷²»Äܳ¬¹ý0.5A£¬´Ëʱµç·µÄ×ܵç×èΪR
×Ü=
=
=12¦¸£¬»¬¶¯±ä×èÆ÷µÄ×îС×èÖµR
С=R
×Ü-R
µÆ=12¦¸-4¦¸=8¦¸£®
´ð£º£¨1£©»¬¶¯±ä×èÆ÷µÄ×î´ó×èֵΪ20Å·¡¢²úÉúµÄÈÈÁ¿Îª108J£®
£¨2£©µç×èR
1µÄ×èֵΪ60¦¸£®
£¨3£©»¬¶¯±ä×èÆ÷µÄ±ä»¯·¶Î§Îª8¦¸¡«20¦¸£®
·ÖÎö£º£¨1£©¶Ï¿ªS
1¡¢±ÕºÏS
2£¬µç·ÖÐÖ»Ó묶¯±ä×èÆ÷£¬µçѹ±íµÄ¶ÁÊý¾ÍÊǵçÔ´µçѹ£¬ÓÉÅ·Ä·¶¨ÂÉ¿ÉÇóµÃ»¬¶¯±ä×èÆ÷µÄ×î´ó×èÖµ£®
£¨2£©±ÕºÏS
1¡¢S
2£¬µç×èR
1²¢ÁªÔÚµçÔ´ÉÏ£¬ÓÉÅ·Ä·¶¨ÂÉ¿ÉÇóµÃR
1µÄ×èÖµ£®
£¨3£©¶Ï¿ªS
1¡¢S
2£¬»¬¶¯±ä×èÆ÷ÓëµçµÆ´®Áª£¬ÓɵçÁ÷±íºÍµçѹ±íµÄ°²È«À´È·¶¨»¬¶¯±ä×èÆ÷µÄ±ä»¯·¶Î§£®
µãÆÀ£º±¾Ì⿼²éÁË¿ª¹ØµÄ״̬¶Ôµç·µÄÁ¬½Ó·½Ê½µÄÓ°ÏìºÍÀûÓÃÅ·Ä·¶¨ÂÉ¡¢µç¹¦Âʹ«Ê½µÄ×ۺϼÆË㣮Ҫ×ÐϸÅжÏÓõçÆ÷ÔÚ¿ª¹ØµÄ²»Í¬×´Ì¬ÏµÄÁ¬½ÓÐÎʽ£¬Áé»îÓ¦ÓõçѧÖеĹ«Ê½£¬Óò»Í¬µÄÉÏϱê±íʾÇå³þ²»Í¬µÄÎïÀíÁ¿£®