ÌâÄ¿ÄÚÈÝ
17£®ÈçͼËùʾ£¬Á½×ã¹»³¤µÄ¹â»¬½ðÊôµ¼¹ìˮƽ·ÅÖã¬Ïà¾àΪd=0.1m£¬Ò»µçÁ÷±íÓëÁ½µ¼¹ìÏàÁ¬£¬ÔÈÇ¿´Å³¡Óëµ¼¹ìƽÃæ´¹Ö±£®Ò»ÖÊÁ¿Îªm=10g¡¢ÓÐЧµç×èΪR=0.1¦¸µÄµ¼Ìå°ô£¬ÔÚ´óСΪ0.1N¡¢·½ÏòˮƽÏòÓÒµÄÁ¦F×÷ÓÃÏ£¬´Ó¾à´Å³¡×ó±ß½çL=0.2m´¦Óɾ²Ö¹¿ªÊ¼Ô˶¯£®µ¼Ìå°ô½øÈë´Å³¡ºó£¬µçÁ÷±íµÄµçÁ÷Öð½¥¼õС£¬×îÖÕÎȶ¨ÎªI0=1A£¬Õû¸öÔ˶¯¹ý³ÌÖУ¬µ¼Ìå°ôÓëµ¼¹ì½Ó´¥Á¼ºÃ£¬ÇÒʼÖÕ±£³Öˮƽ£¬²»¼Æµ¼¹ìÓëµçÁ÷±íµÄµç×裮Ç󣺣¨1£©´Å¸ÐӦǿ¶ÈBµÄ´óС£»
£¨2£©µçÁ÷Îȶ¨ºó£¬µ¼Ìå°ôÔ˶¯ËÙ¶ÈvµÄ´óС£»
£¨3£©Á÷¾µçÁ÷±íµçÁ÷µÄ×î´óÖµIm£®
·ÖÎö £¨1£©ÓɵçÁ÷Îȶ¨Ê±°²ÅàÁ¦Îȶ¨£¬ËÙ¶ÈÎȶ¨µÃµ½µ¼Ìå°ôÊÜÁ¦Æ½ºâ£¬½ø¶øÓÉ°²ÅàÁ¦µÈÓÚFÇó½â¼´¿É£»
£¨2£©µçÁ÷Îȶ¨Ê±£¬°²ÅàÁ¦Îȶ¨£¬ÇóµÃ°²ÅàÁ¦µÄ±í´ïʽ£¬¼´¿ÉÇóµÃËٶȣ»
£¨3£©Óɶ¯Äܶ¨ÀíÇóµÃµ¼Ìå°ô½øÈë´Å³¡Ê±µÄËٶȣ¬½ø¶øµÃµ½µ¼Ìå°ôÔڴų¡ÖÐÔ˶¯µÄ×î´óËٶȣ»ÔÙд³öµçÁ÷ÓëËٶȵĹØϵʽ£¬¼´¿ÉÇóµÃ×î´óµçÁ÷£®
½â´ð ½â£º£¨1£©µ¼Ìå°ôÔÚˮƽ·½ÏòÉÏÖ»ÊÜÍâÁ¦FºÍ°²ÅàÁ¦F°²µÄ×÷Óã¬${F}_{°²}=BId=\frac{{B}^{2}{d}^{2}v}{R}$£»
µ±µçÁ÷Îȶ¨Ê±£¬°²ÅàÁ¦´óС²»±ä£¬µ¼Ìå°ôËٶȲ»±ä£¬µ¼Ìå°ôÊÜÁ¦Æ½ºâ£¬ÔòÓÐF=F°²=BI0d£¬ËùÒÔ£¬$B=\frac{F}{{I}_{0}d}=\frac{0.1}{1¡Á0.1}T=1T$£»
£¨2£©ÓÉ£¨1£©¿ÉÖª£¬µçÁ÷Îȶ¨ºó£¬$F={F}_{°²}=\frac{{B}^{2}{d}^{2}v}{R}$£¬ËùÒÔ£¬$v=\frac{FR}{{B}^{2}{d}^{2}}=\frac{0.1¡Á0.1}{{1}^{2}¡Á0£®{1}^{2}}m/s=1m/s$£»
£¨3£©Éèµ¼Ìå°ô½øÈë´Å³¡Ê±µÄËÙ¶ÈΪv0£¬ÔòÓɶ¯Äܶ¨Àí¿ÉµÃ£º$FL=\frac{1}{2}m{{v}_{0}}^{2}$£¬ËùÒÔ£¬${v}_{0}=\sqrt{\frac{2FL}{m}}=\sqrt{\frac{2¡Á0.1¡Á0.2}{10¡Á1{0}^{-3}}}m/s=2m/s$£»
v0£¾v£¬ËùÒÔ£¬µ¼Ìå°ô½øÈë´Å³¡ºó×ö¼õËÙÔ˶¯µ½ËÙ¶ÈΪv£¬×îºó×öÔÈËÙÔ˶¯£¬ÄÇô£¬µ¼Ìå°ôÔڴų¡ÖÐÔ˶¯µÄ×î´óËÙ¶ÈΪv0£¬
Á÷¾µçÁ÷±íµçÁ÷µÄ×î´óÖµ${I}_{m}=\frac{Bd{v}_{m}}{R}=\frac{1¡Á0.1¡Á2}{0.1}A=2A$£»
´ð£º£¨1£©´Å¸ÐӦǿ¶ÈBµÄ´óСΪ1T£»
£¨2£©µçÁ÷Îȶ¨ºó£¬µ¼Ìå°ôÔ˶¯ËÙ¶ÈvµÄ´óСΪ1m/s£»
£¨3£©Á÷¾µçÁ÷±íµçÁ÷µÄ×î´óÖµImΪ2A£®
µãÆÀ Ôڱպϵç·Çиî´Å¸ÐÏßµÄÎÊÌâÖУ¬Ò»°ãÓÉËÙ¶ÈÇóµÃµç¶¯ÊÆ£¬ÔÙ¸ù¾Ýµç·ÇóµÃµçÁ÷£¬½ø¶øµÃµ½°²ÅàÁ¦µÄ±í´ïʽ£»È»ºóÎÒÃǾͿÉÒÔͨ¹ýÊÜÁ¦·ÖÎö£¬Ó¦ÓÃÅ£¶ÙµÚ¶þ¶¨ÂÉÇóµÃÔ˶¯·½³Ìʽ£¬²¢Óж¯Äܶ¨ÀíÇóµÃ¹¦¡¢ÄÜÁ¿µÄÏà¹ØÎÊÌ⣮
A£® | СÇòÔÚbµãÊܵ½µÄÀÁ¦ÎªÁã | |
B£® | СÇòÔÚÊúֱƽÃæÄÚ×öÔÈËÙÔ²ÖÜÔ˶¯ | |
C£® | СÇòÔÚaµãÊܵ½µÄÀÁ¦Îª6mg | |
D£® | ÈôÒÔaµãËùÔÚˮƽÃæΪÁãÊÆÄÜÃ棬ÔòСÇòÔÚbµãµÄ»úеÄÜΪ$\frac{1}{2}mv_0^2$ |
A£® | ²£¶ûÀíÂÛÒ²ÄܺܺõؽâÊ͸´ÔÓÔ×ӵĹâÆ× | |
B£® | ²£¶ûÀíÂÛÈÏΪÔ×ÓµÄÄÜÁ¿ÊÇÁ¬ÐøµÄ£¬µç×ӵĹìµÀ°ë¾¶ÊDz»Á¬ÐøµÄ | |
C£® | µ±ÇâÔ×Ó´Ón=2µÄ״̬ԾǨµ½n=3µÄ״̬ʱ£¬»á·øÉä³ö1.89 eVµÄ¹â×Ó | |
D£® | ´óÁ¿´¦ÔÚn=2 Äܼ¶µÄÇâÔ×Ó¿ÉÒÔ±»2.00 eVµÄµç×ÓÅöײ¶ø·¢ÉúԾǨ |
A£® | µç×èR²úÉúµÄÈÈÁ¿ÉÏÐдóÓÚÏÂÐÐ | B£® | µç×èRÉÏͨ¹ýµÄµçÁ¿ÉÏÐдóÓÚÏÂÐÐ | ||
C£® | ½ðÊô¸ËµÄÄ©ËÙ¶ÈÓë³õËÙ¶ÈÏàµÈ | D£® | ÉÏÐÐʱ¼äСÓÚÏÂÐÐʱ¼ä |
A£® | СÇòËùÊÜÖØÁ¦ºÍ×èÁ¦Ö®±ÈΪ4£º1 | |
B£® | СÇòÉÏÉý¹ý³ÌÓëÏÂÂä¹ý³ÌËùÓÃʱ¼äÖ®±ÈΪ2£º3 | |
C£® | СÇòÂä»Øµ½Å׳öµãʱµÄËٶȴóСΪ8$\sqrt{6}$m/s | |
D£® | СÇòÏÂÂä¹ý³ÌÖУ¬Êܵ½ÏòÉϵĿÕÆø×èÁ¦£¬´¦ÓÚ³¬ÖØ״̬ |
A£® | ¹âµçЧӦÖУ¬´Ó½ðÊôÖз¢³öµÄ¹âµçÓÚµÄ×î´ó³õ¶¯ÄÜÓëÈëÉä¹âµÄƵÂʳÉÕý±È | |
B£® | ¶ÔÕÕÌå·øÉäµÄÑо¿±íÃ÷£ºËæ×ÅζȵÄÉý¸ß£¬·øÉäÇ¿¶ÈµÄ×î´óÖµÏò²¨³¤½Ï³¤µÄ·½ÏòÒƶ¯ | |
C£® | ºËÁѱäÓëºË¾Û±ä·´Ó¦Öоù´æÔÚÖÊÁ¿¿÷Ë𣬻áÊͷųö½Ï¶àµÄºËÄÜ | |
D£® | ${\;}_{52}^{215}U$µÄ°ëË¥ÆÚËæ×Å»·¾³µÄ²»¶Ï±ä»¯£¬°ëË¥ÆÚ¿ÉÄܱä¶Ì |
A£® | Q2´øÕýµçÇÒµçºÉÁ¿Ð¡ÓÚQ1 | |
B£® | bµãµÄ³¡Ç¿Ò»¶¨ÎªÁã | |
C£® | aµãµÄµçÊƱÈbµãµÄµçÊÆµÍ | |
D£® | Á£×ÓÔÚaµãµÄµçÊÆÄܱÈbµãµÄµçÊÆÄÜ´ó |