ÌâÄ¿ÄÚÈÝ
12£®Í¼¼×ΪijºãÎÂ×°Öõĵç·ÔÂñͼ£®Í¼ÖУ¬ÀíÏë±äѹÆ÷Ô¡¢¸±ÏßȦÔÑÊý±ÈΪ5£º1£¬µçѹ±íºÍµçÁ÷±í¾ùΪÀíÏëµç±í£®¸±ÏßȦËùÔÚµç·ÖУ¬R0Ϊ¶¨Öµµç×裬RΪ°ëµ¼ÌåÈÈÃôµç×裨Æä×èÖµËæζȵÄÉý¸ß¶ø¼õС£©£¬DΪÀíÏë¶þ¼«¹Ü£¬R1Ϊµç×èºã¶¨µÄµçÈÈË¿£¬AB¼äµçѹ±ä»¯Çé¿öÈçͼÒÒËùʾ£®ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£¨¡¡¡¡£©A£® | AB¼äµçѹµÄÓÐЧֵΪ44V | |
B£® | ÔÏßȦÁ½¶ËµçѹµÄÓÐЧֵΪ220V | |
C£® | R´¦Î¶ÈÉý¸ßʱ£¬R1ÏûºÄµÄµç¹¦ÂʼõС | |
D£® | ÀíÏë±äѹÆ÷Ô¡¢¸±ÏßȦÖеĵçÁ÷Ö®±ÈΪ1£º5 |
·ÖÎö ÇóÓÐЧֵ·½·¨Êǽ«½»Á÷µçÔÚÒ»¸öÖÜÆÚÄÚ²úÉúÈÈÁ¿Ó뽫ºã¶¨µçÁ÷ÔÚÏàͬʱ¼äÄÚ²úÉúµÄÈÈÁ¿ÏàµÈ£¬Ôòºã¶¨µçÁ÷µÄÖµ¾ÍÊǽ»Á÷µçµÄÓÐЧֵ£®°ëµ¼ÌåÈÈÃôµç×èÊÇÖ¸ËæζÈÉÏÉýµç×è³ÊÖ¸Êý¹Øϵ¼õС¡¢¾ßÓиºÎ¶ÈϵÊýµÄµç×裬R´¦Î¶ÈÉý¸ßʱ£¬×èÖµ¼õС£¬¸ù¾Ý¸ºÔصç×èµÄ±ä»¯£¬¿ÉÖªµçÁ÷¡¢µçѹ±ä»¯£®
½â´ð ½â£ºAD¡¢ÓÉÓÚ¶þ¼«¹ÜµÄµ¥Ïòµ¼µçÐÔ£¬¸ù¾ÝµçÁ÷µÄÈÈЧӦÓÐ$\frac{4{4}_{\;}^{2}}{R}\frac{T}{2}=\frac{{U}_{AB}^{2}}{R}T$£¬AB¼äµÄµçѹÓÐЧֵΪ${U}_{AB}^{\;}$=$22\sqrt{2}V$£¬ÇÒÔ¸±ÏßȦµÄµçÁ÷Ö®±È²»ÔÙµÈÓÚÔÑÊýÖ®±È£¬¹ÊA¡¢D´í£»
B¡¢¸±ÏßȦµçѹµÄÓÐЧֵ44V£¬¸ù¾ÝµçѹÓëÔÑÊý³ÉÕý±ÈµÃÔÏßȦµçѹµÄÓÐЧֵΪ44¡Á5=220V£¬¹ÊBÕýÈ·£»
C¡¢Î¶ÈÉý¸ßʱ£¬R¼õС£¬I2Ôö´ó£¬¹ÊR0·Öѹ±ä´ó¶øR1·Öѹ¼õС£¬¹¦ÂÊÒ²¼õС£¬¹ÊCÕýÈ·£»
¹ÊÑ¡£ºBC
µãÆÀ ¸ù¾ÝµçÁ÷µÄÈÈЧӦ£¬Çó½â½»±äµçÁ÷µÄÓÐЧֵÊdz£¼ûÌâÐÍ£¬ÒªÊìÁ·ÕÆÎÕ£®¸ù¾ÝͼÏó׼ȷÕÒ³öÒÑÖªÁ¿£¬ÊǶÔѧÉúÈÏͼµÄ»ù±¾ÒªÇó£¬×¼È·ÕÆÎÕÀíÏë±äѹÆ÷µÄÌص㼰µçѹ¡¢µçÁ÷±ÈÓëÔÑÊý±ÈµÄ¹Øϵ£¬Êǽâ¾ö±¾ÌâµÄ¹Ø¼ü£®
A£® | Ô˶¯¹ý³ÌÖÐÖØÁ¦µÄƽ¾ù¹¦ÂÊ$\overline{{P}_{A}}$£¼$\overline{P}$B | B£® | Ô˶¯¹ý³ÌÖÐÖØÁ¦µÄƽ¾ù¹¦ÂÊ$\overline{{P}_{A}}$=$\overline{P}$B | ||
C£® | µ½´ïµØÃæʱÖØÁ¦µÄ˲ʱ¹¦ÂÊ$\overline{{P}_{A}}$£¼$\overline{P}$B | D£® | µ½´ïµØÃæʱÖØÁ¦µÄ˲ʱ¹¦ÂÊ$\overline{{P}_{A}}$=$\overline{P}$B |
A£® | ÎïÌåÒÔ2m/s2µÄ¼ÓËÙ¶È×öÔȼÓËÙÖ±ÏßÔ˶¯£¬ÔòÔÚÈÎÒâ1sÄÚÎïÌåµÄÄ©ËÙ¶ÈÒ»¶¨±È³õËٶȴó2m/s | |
B£® | ÔÚÔȼÓËÙÖ±ÏßÔ˶¯ÖУ¬ÎïÌåµÄ¼ÓËٶȷ½ÏòºÍËٶȷ½Ïò±Ø¶¨Ïàͬ | |
C£® | ²»¿ÉÄܳöÏÖÎïÌåµÄ¼ÓËٶȼõС£¬Ëٶȷ´¶øÔö´óµÄÔ˶¯ | |
D£® | Ëٶȵı仯ÂÊÔ½´ó£¬Ôò¼ÓËÙ¶ÈÔ½´ó |
£¨1£©±¾ÊµÑéÖУ¬ÏÂÁвÙ×÷ºÏÀíµÄÊÇAC£®
A£®ÕÚ¹âÌõµÄ¿í¶ÈÓ¦¾¡Á¿Ð¡Ð©
B£®ÊµÑéÇ°½«ÇáÖÊ¿¨ÖÃÓÚ¹âµçß½½ü
C£®ÎªÁËʵÑé³É¹¦£¬Ä¾¿éµÄÇã½Ç±ØÐë´óÓÚijһֵ
£¨2£©ÓÃÂÝÐý²â΢Æ÷²âÁ¿ÕÚ¹âÌõµÄ¿í¶È£¬ÈçͼÒÒËùʾ¶ÁÊýΪ3.700 mm£®
£¨3£©¸Ä±äľ¿éµÄ³õËٶȣ¬²âÁ¿³öËüÏòÉÏÔ˶¯µÄ×î´ó¾àÀëÓëľ¿éÀ´»Ø¾¹ý¹âµçÃÅʱËٶȵÄƽ·½²î£¬½á¹ûÈç±íËùʾ£¬ÊÔÔÚ±ûͼ×ø±êÖ½ÉÏ×÷³ö¡÷v2-xµÄͼÏ󣬾²âÁ¿Ä¾°åÇã½ÇµÄÓàÏÒֵΪ0.6£¬ÖØÁ¦¼ÓËÙ¶ÈÈ¡g=9.80m/s2£¬Ôòľ¿éÓëľ°å¼äµÄ¶¯Ä¦²ÁÒòÊýΪ0.010£¨½á¹û±£ÁôÁ½Î»ÓÐЧÊý×Ö£©£®
ÐòºÅ | 1 | 2 | 3 | 4 | 5 |
X/cm | 16.0 | 36.0 | 60.0 | 70.0 | 88.0 |
¡÷v2/m2s-2 | 0.04 | 0.09 | 0.15 | 0.19 | 0.22 |
A£® | Á÷¹ýµç×èµÄ×î´óµçÁ÷ÊÇ20A | B£® | Óëµç×è²¢ÁªµÄµçѹ±íµÄʾÊýÊÇ100V | ||
C£® | ¾1·ÖÖÓµç×è·¢³öµÄÈÈÁ¿ÊÇ6¡Á103J | D£® | ±äѹÆ÷µÄÊäÈ빦ÂÊÊÇ1¡Á103W |
A£® | ÖØÎïµÄÖÊÁ¿ | |
B£® | ÖØÁ¦¼ÓËÙ¶È | |
C£® | ÖØÎïÏÂÂäµÄ¸ß¶È | |
D£® | ÖØÎïÏÂÂäijһ¸ß¶ÈËù¶ÔÓ¦µÄ˲ʱËÙ¶È |