| A£® | L1¡¢L2Á½µÆµÆË¿µç×èÖ®±ÈΪ2£º3 | |
| B£® | ¼×¡¢ÒÒÁ½Í¼ÖеÆL2Á½¶ËµÄµçѹ֮±ÈΪ1£º2 | |
| C£® | L2Ôڼס¢ÒÒÁ½¸öµç·Öеĵ繦ÂÊ·Ö±ðΪ2 WºÍ4.5 W | |
| D£® | ¼×¡¢ÒÒÁ½Í¼Öеç·ÏûºÄµÄ×ܹ¦ÂÊÖ®±ÈΪ2£º9 |
·ÖÎö £¨1£©¼×ͼÖУ¬Á½µÆ´®Áª£¬ÒÒͼÖÐÁ½µÆ²¢Áª£¬¸ù¾Ý¹«Ê½P=$\frac{{U}^{2}}{R}$¿ÉÇó¼×ÒÒÁ½Í¼ÖеÆL1Á½¶ËµÄµçѹ֮±È£¬¸ù¾Ý´®Áªµç·µÄÌØµãºÍÅ·Ä·¶¨ÂɽáºÏ¼×ͼÇó³öL1¡¢L2Á½µÆµÆË¿µç×èÖ®±È£¬ÔÙ¸ù¾ÝP=I2RÇó³ö¼×ͼÖеÆL1¡¢L2µÄ¹¦ÂÊÖ®±È£»
£¨2£©¸ù¾Ýµç×èµÄ´®ÁªºÍP=$\frac{{U}^{2}}{R}$Çó³ö¼×ͼµç·ÏûºÄµÄ×ܹ¦ÂÊ£»ÔÙ¸ù¾Ý²¢Áªµç·µÄµçÑ¹ÌØµãºÍP=$\frac{{U}^{2}}{R}$±íʾ³öÒÒͼÖÐÁ½µÆÅݵĵ繦ÂÊ£¬Á½Õß¹¦ÂÊÖ®ºÍ¼´ÎªÒÒͼÖеç·ÏûºÄµÄ×ܹ¦ÂÊ£¬½øÒ»²½½áºÏµç×è¹ØÏµÇó³ö¼×¡¢ÒÒÁ½Í¼Öеç·ÏûºÄµÄ×ܹ¦ÂÊÖ®±È£®
½â´ð ½â£º£¨1£©¼×ͼÖеÆL1µÄ¹¦ÂÊP1=$\frac{{U}_{1}^{2}}{{R}_{1}}$£¬ÒÒͼÖеÆL1µÄ¹¦ÂÊP1¡ä=$\frac{{U}^{2}}{{R}_{1}}$£¬
$\frac{{P}_{1}}{{P}_{1}^{¡ä}}$=$\frac{\frac{{U}_{1}^{2}}{{R}_{1}}}{\frac{{U}^{2}}{{R}_{1}}}$=$\frac{{U}_{1}^{2}}{{U}^{2}}$=$\frac{4W}{9W}$=$\frac{4}{9}$£¬
½âµÃ£º$\frac{{U}_{1}}{U}$=$\frac{2}{3}$£¬
´®Áªµç·ÖÐ×ܵçѹµÈÓÚ¸÷·Öµçѹ֮ºÍ£¬
¼×¡¢ÒÒÁ½Í¼ÖÐL2µÄµçѹ֮±È£º$\frac{{U}_{2}}{U}$=$\frac{U-{U}_{1}}{U}$=$\frac{3-2}{3}$=$\frac{1}{3}$£¬¹ÊB´íÎó£»
£¨2£©¼×ͼÖУº´®Áªµç·ÖÐ×ܵçѹµÈÓÚ¸÷·Öµçѹ֮ºÍ£¬ÇÒµç·Öи÷´¦µÄµçÁ÷ÏàµÈ£¬
$\frac{{R}_{1}}{{R}_{2}}$=$\frac{\frac{{U}_{1}}{I}}{\frac{{U}_{2}}{I}}$=$\frac{{U}_{1}}{{U}_{2}}$=$\frac{{U}_{1}}{U-{U}_{1}}$=$\frac{2}{3-2}$=$\frac{2}{1}$£¬¹ÊA´íÎó£»
L2ÔÚ¼×Öеĵ繦ÂÊΪP2£¬ÓÉP=I2R¿ÉµÃ£¬
$\frac{{P}_{1}}{{P}_{2}}$=$\frac{{I}^{2}{R}_{1}}{{I}^{2}{R}_{2}}$=$\frac{{R}_{1}}{{R}_{2}}$=$\frac{2}{1}$£¬
Ôò$\frac{4W}{{P}_{2}}$=$\frac{2}{1}$£¬
½âµÃP2=2W£¬
¼×ͼÖУ¬Á½µÆÅݵçѹÏàͬ£¬
Ôò$\frac{{P}_{1}^{¡ä}}{{P}_{2}^{¡ä}}$=$\frac{\frac{{U}^{2}}{{R}_{1}}}{\frac{{U}^{2}}{{R}_{2}}}$=$\frac{{R}_{2}}{{R}_{1}}$=$\frac{1}{2}$£¬
Ôò$\frac{9W}{{P}_{2}^{¡ä}}$=$\frac{1}{2}$£¬
½âµÃ${P}_{2}^{¡ä}$=18W£¬¹ÊC´íÎó£»
£¨3£©´®Áªµç·ÖÐ×ܵç×èµÈÓÚ¸÷·Öµç×èÖ®ºÍ£¬
¼×ͼÖеç·ÏûºÄµÄ×ܹ¦ÂÊ£º
P¼×=$\frac{{U}^{2}}{{R}_{1}+{R}_{2}}$=$\frac{{U}^{2}}{2{R}_{2}+{R}_{2}}$=$\frac{{U}^{2}}{3{R}_{2}}$£¬
²¢Áªµç·Öи÷֧·Á½¶ËµÄµçѹÏàµÈ£¬
ÒÒͼµç·ÏûºÄµÄ×ܹ¦ÂÊ£º
PÒÒ=$\frac{{U}^{2}}{{R}_{1}}$+$\frac{{U}^{2}}{{R}_{2}}$=$\frac{{U}^{2}}{2{R}_{2}}$+$\frac{{U}^{2}}{{R}_{2}}$=$\frac{3{U}^{2}}{2{R}_{2}}$£¬
$\frac{{P}_{¼×}}{{P}_{ÒÒ}}$=$\frac{\frac{{U}^{2}}{3{R}_{2}}}{\frac{3{U}^{2}}{2{R}_{2}}}$=$\frac{2}{9}$£¬¹ÊDÕýÈ·£®
¹ÊÑ¡D£®
µãÆÀ ±¾Ì⿼²éѧÉú¶ÔÅ·Ä·¶¨ÂÉ¡¢´®²¢ÁªÌصãµÄÕÆÎÕºÍÔËÓã¬ÒªÇóÁé»îÑ¡Óù«Ê½£¬Éæ¼°µ½Çó±ÈÖµÎÊÌ⣬ҪϸÐÄ·ÀÖ¹Òòµßµ¹¶ø³ö´í£®
| Äê¼¶ | ¸ßÖÐ¿Î³Ì | Äê¼¶ | ³õÖÐ¿Î³Ì |
| ¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º×÷ͼÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ
| A£® | ¼×³µÔÚ×öÔÈËÙÖ±ÏßÔ˶¯ | |
| B£® | ǰ10sÄÚÒÒ³µµÄÈË¿´µ½¼×³µÏòºóÍËÈ¥ | |
| C£® | ¼×¡¢ÒÒÁ½³µÔÚ40sÄ򵀮½¾ùËÙ¶ÈÏàͬ | |
| D£® | µÚ20sµ½µÚ30sÖ®¼äµÄƽ¾ùËٶȼ׳µ´óÓÚÒÒ³µ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | Á½ÊÖ»¥ÏàĦ²ÁÊÖ»á¸Ð¾õ·¢ÈÈ | B£® | ´Ó»¬ÌÝÉÏ»¬ÏÂÍβ¿¸Ð¾õ·¢ÈÈ | ||
| C£® | ¹Å´úÈËÀàÕÆÎÕ×êľȡ»ðµÄ·½·¨ | D£® | ·¢ÉÕÓÃÀäë½í¸øÍ·²¿½µÎ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¼ÆËãÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑé̽¾¿Ìâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¹ú¼ÊѧУÓÅÑ¡ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com