ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Èçͼ¼×µÄµç·ÖУ¬µçÔ´µçѹ±£³Ö²»±ä¡£µÆÅÝLµÄµçÁ÷ËæµçѹUµÄ±ä»¯¹ØϵÈçͼÒÒ¡£¶¨Öµµç×èR1=60¦¸£¬R2Ϊ±êÓС°90¦¸ 1A¡±µÄ»¬¶¯±ä×èÆ÷¡£
£¨1£©»¬¶¯±ä×èÆ÷µÄ»¬Æ¬ÔÚÖеãʱ£¬Ö»±ÕºÏ¿ª¹ØS2£¬µçÁ÷±íµÄʾÊýΪ0.2A£¬ÇóµçÔ´µçѹ£»
£¨2£©Èô½«»¬¶¯±ä×èÆ÷µÄ»¬Æ¬ÒÆÖÁa¶Ë£¬Ö»±ÕºÏ¿ª¹ØS2¡¢S3ºó£¬ÇóµçÁ÷±íµÄʾÊý£»
£¨3£©Ö»±ÕºÏ¿ª¹ØS1,ÈôµÆÅÝÁ½¶Ëµçѹ²»Äܳ¬¹ý6V£¬µçÁ÷±íµÄÁ¿³ÌΪ0~0.6A£¬µçѹ±íµÄÁ¿³ÌΪ0-15V£¬ÎªÁ˱£»¤µç·µÄ°²È«£¬Ç󻬶¯±ä×èÆ÷R2µÄÈ¡Öµ·¶Î§¡£
¡¾´ð°¸¡¿(1) 18V£»(2) 0.5A£»(3) 24¦¸-50¦¸¡£
¡¾½âÎö¡¿
(1)µçѹ±í¿´³É¶Ï·£¬»¬¶¯±ä×èÆ÷µÄ»¬Æ¬ÔÚÖеãʱ£¬Ö»±ÕºÏ¿ª¹ØS2£¬½«±ä×èÆ÷R2µÄ×î´óµç×è½ÓÈëµç·ÖУ¬µçÁ÷±í²âÁ¿Í¨¹ý±ä×èÆ÷µÄµçÁ÷£¬µçÔ´µçѹ
U=IR»¬=0.2A¡Á90¦¸=18V£»
(2)Èô½«»¬¶¯±ä×èÆ÷µÄ»¬Æ¬ÒÆÖÁa¶Ë£¬±ä×èÆ÷Á¬Èëµç·µÄµç×è×î´ó£¬Ö»±ÕºÏ¿ª¹ØS2¡¢S3ºó£¬µÆÅÝL±»¶Ì·£¬µç×èR1ºÍ±ä×èÆ÷R2²¢Áª£¬µçÁ÷±í²âÁ¿¸É·ÖеĵçÁ÷£¬µçÁ÷±íµÄʾÊý
I×Ü=I1+I2==0.3A+0.2A=0.5A£»
(3)Ö»±ÕºÏ¿ª¹ØS1£¬µÆÅݺͱä×èÆ÷´®Áª£¬µçѹ±í²âÁ¿±ä×èÆ÷Á½¶ËµÄµçѹ£¬µçÁ÷±í²âÁ¿µç·ÖеĵçÁ÷£¬ÓÉͼÒÒ¿ÉÖª£¬µÆÅÝÁ½¶ËµçѹÊÇ6Vʱ£¬Í¨¹ýµÆÅݵĵçÁ÷ÊÇ0.5A£¬µ±µÆÅÝÕý³£·¢¹âʱµç·ÖеĵçÁ÷×î´ó£¬»¬¶¯±ä×èÆ÷µÄ×èÖµ×îС£¬Òò´®Áªµç·ÖÐ×ܵçѹµÈÓÚ¸÷·Öµçѹ֮ºÍ£¬ËùÒÔ£¬»¬¶¯±ä×èÆ÷Á½¶ËµÄµçѹ£º
URС=U-UL=18V-6V=12V£¬
»¬¶¯±ä×èÆ÷µÄ×îСֵ
R×îС==24¦¸£¬
µçѹ±íµÄÁ¿³ÌΪ0-15V£¬µ±µçѹ±íµÄʾÊý15Vʱ£¬»¬¶¯±ä×èÆ÷µÄÈ¡Öµ×î´ó£¬µç·ÖеĵçÁ÷×îС£»Òò´®Áªµç·ÖÐ×ܵçѹµÈÓÚ¸÷·Öµçѹ֮ºÍ£¬ËùÒÔ£¬µÆÅÝÁ½¶ËµÄµçѹ£º
ULС=U-UR´ó=18V-15V=3V£¬
ÓÉͼÒÒ¿ÉÖª£¬´ËʱµçÁ÷ΪI×îС=0.3A£¬»¬¶¯±ä×èÆ÷µÄ×î´óÖµ
R×î´ó==50¦¸£¬
»¬¶¯±ä×èÆ÷R2µÄÈ¡Öµ·¶Î§ÊÇ24¦¸-50¦¸¡£
´ð£º(1)µçÔ´µçѹÊÇ18V£»
(2)µçÁ÷±íµÄʾÊýÊÇ0.5A£»
(3)»¬¶¯±ä×èÆ÷R2µÄÈ¡Öµ·¶Î§ÊÇ24¦¸-50¦¸¡£
¡¾ÌâÄ¿¡¿ÈçͼËùʾÊÇ̽¾¿£º¡°±È½Ï²»Í¬ÎïÖÊÎüÈÈÄÜÁ¦¡±µÄʵÑéÖУ¬½«Î¶ȴ«¸ÐÆ÷¼°·Ö±ðÊ¢ÓÐÖÊÁ¿ÏàͬˮºÍÉ«ÀÓ͵ÄÁ½¸öÊԹ̶ܹ¨ÔÚÌú¼Ų̈ÉÏ£¬Î¶ȴ«¸ÐÆ÷µÄ̽ͷ²¿·ÖÓëÊÔ¹ÜÄÚµÄË®ºÍÉ«ÀÓÍÁ¼ºÃ½Ó´¥£¬Á½Ö»Î¶ȴ«¸ÐÆ÷²É¼¯Êý¾ÝÈçÏÂ±í£º
ÎïÖÊ | ÖÊÁ¿/g | ³õʼζÈ/¡æ | ¼ÓÈÈʱ¼ä/min | Ä©ÎÂ/¡æ |
Ë® | 200 | 20 | 6 | 45 |
É«ÀÓÍ | 200 | 20 | 6 | 75 |
(1)ÊÔ¹ÜÖмÓÈëµÄË®ºÍʳÓÃÓͳý³õÎÂÏàͬÍ⻹Ӧ±£Ö¤______(Ìî ¡°Ìå»ý¡±»ò ¡°ÖÊÁ¿¡±)Ïàͬ¡£
(2)ʵÑéÖÐÎïÖÊÎüÈȵĶàÉÙÊÇͨ¹ý_______·´Ó³µÄ£®ÕâÖÖÑо¿ÎïÀíµÄ·½·¨ÊÇ_______¡£
(3)ÓÉÓÚûÓÐÖ±½Ó²âÁ¿±ÈÈÈÈݵÄÒÇÆ÷£¬Òò´ËÕâ¸öʵÑéÊÇͨ¹ý¹Û²ì______µÄ±ä»¯À´±È½Ï±ÈÈÈÈݵĴóС£®
(4)ʵÑéÖз¢ÏÖÉ«ÀÓ͵ÄζȱÈË®µÄζÈÉý¸ßµÃ_____(Ñ¡Ìî¡°¿ì¡±»ò¡°Âý¡±)£¬Õâ±íÃ÷_____ÎüÈȱ¾Áì¸üÇ¿£®
¡¾ÌâÄ¿¡¿ÔÚ×ö¡°·ü°²·¨²âÁ¿Ð¡µÆÅݵç×衱µÄʵÑéÖУ¬Ð¡µÆÅݵĶµçѹΪ3.8V£¬¹À¼ÆСµÆÅݵÄ×èÖµ15×óÓÒ£®Í¬Ñ§ÃÇÉè¼ÆÁËÈçͼ¼×ËùʾµÄµç·£¬ÇëÄãÍê³ÉÏÂÁÐÎÊÌ⣺
ʵÑé´ÎÊý | µçѹ/V | µçÁ÷/A |
1 | 3.0 | 0.20 |
2 | 3.8 | 0.24 |
3 | 4.2 | 0.26 |
£¨1£©°´ÕÕÌâÖеÄÊý¾Ý£¬±¾ÊµÑéÖУ¬µçÁ÷±íµÄÁ¿³ÌӦѡÓÃ_____£¬µçѹ±íµÄÁ¿³ÌӦѡÓÃ_____£®
£¨2£©Çë¸ù¾Ýͼ¼×ËùʾµÄµç·ͼ£¬ÓñʻÏß´úÌæµ¼Ïߣ¬½«Í¼ÒÒÖеĵç·Ԫ¼þÁ¬½ÓÆðÀ´£¨µçÁ÷±íºÍµçѹ±íӦѡÔñºÏÊʵÄÁ¿³Ì£©£®
£¨______£©
±ÕºÏ¿ª¹ØÇ°£¬»¬¶¯±ä×èÆ÷µÄ»¬Æ¬Ó¦»¬µ½_____¶Ë£¨Ìî¡°A¡±»ò¡°B¡±£©£¬Á¬Ïß¹ý³ÌÖУ¬¿ª¹ØÓ¦´¦ÓÚ_____״̬£®
£¨3£©±ÕºÏ¿ª¹Øºó£¬Ð¡Ã÷ͬѧ·¢ÏÖµçÁ÷±í¡¢µçѹ±í¾ùÓÐʾÊý£¬µ«¶¼ºÜС£¬ÇÒ¿´²»µ½Ð¡µÆÅÝ·¢¹â£¬·ÖÎö¿ÉÄܵÄÔÒòÊÇ_____£®
£¨4£©°´±íÖмǼµÄÊý¾Ý£¬Ð¡Ã÷ͬѧ²â³öСµÆÅÝÕý³£·¢¹âʱµÄµç×èÊÇ_____£®