17£®ÈçͼËùʾµÄµç·ÖУ¬RΪ¶¨Öµµç×裬EΪֱÁ÷µçÔ´£¬ÆäÄÚ×èr=$\frac{1}{3}$R£®Æ½ÐаåµçÈÝÆ÷Á½¼«°å¼äµÄ¾àÀëΪd£®ÔÚÁ½¼«°å¼äµÄÖеãP´¦ÓÐÒ»¸ö´øµçÖʵ㣬µ±µç¼üK¶Ï¿ªÊ±£¬´øµçÖʵãÇ¡ºÃ±£³Ö¾²Ö¹£®Ïְѵç¼üK±ÕºÏ£¬´øµçÖʵ㿪ʼÔ˶¯£¬ÉèµçÈÝÆ÷Á½¼«°å¼äµÄµçѹÔÚ¼«¶Ìʱ¼äÄÚ´ïµ½Îȶ¨Öµ£¬²»¼Æ¿ÕÆø×èÁ¦£¬ÖØÁ¦¼ÓËÙ¶ÈΪg£¬Çó£º
£¨1£©´øµçÖʵãµÄµçÐÔ£»
£¨2£©µç¼üK±ÕºÏʱ´øµçÖʵãµÄ¼ÓËÙ¶È´óС£»
£¨3£©´øµçÖʵãÊ×´ÎÅöµ½¼«°åʱµÄËÙ¶È£®

·ÖÎö £¨1£©Ïȸù¾Ýµç¼üK¶Ï¿ªÊ±£¬µçÈÝÆ÷µÄÉϼ«°å´øÕýµç£¬Åжϵ糡ǿ¶ÈµÄ·½Ïò£¬ÔÙ¸ù¾ÝÖʵãÊÜÁ¦Æ½ºâÅжϵ糡Á¦·½Ïò£¬´Ó¶øÅжÏÖʵãµçÐÔ£»
£¨2£©µ±µç¼üK¶Ï¿ªºÍ±ÕºÏʱ£¬¸ù¾ÝÅ·Ä·¶¨ÂÉÇó³öµçÈÝÆ÷Á½°å¼äµÄµçѹ£¬Ïȸù¾Ýµç¼ü¶Ï¿ªÊ±£¬Ð¡ÇòÊÜÁ¦Æ½ºâ£¬µÃ³öµç³¡Á¦ÓëÖØÁ¦µÄƽºâ·½³Ìʽ£»ÔÙÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉÇó³ö±ÕºÏµç¼üʱСÇòµÄ¼ÓËÙ¶È£»
£¨3£©ÓÉÔ˶¯Ñ§¹«Ê½Çó³ö´øµçСÇòµ½´ï¸Ã¼«°åʱµÄËÙ¶È´óС£®

½â´ð ½â£º£¨1£©µ±µç¼üK¶Ï¿ªÊ±£¬µçÈÝÆ÷µÄÉϼ«°å´øÕýµç£¬µç³¡Ç¿¶ÈÏòÏ£¬´øµãÖʵ㴦ÓÚ¾²Ö¹×´Ì¬£¬ÊÜÁ¦Æ½ºâ£¬Êܵ½ÖØÁ¦ÊúÖ±ÏòÏ£¬Ôòµç³¡Á¦ÊúÖ±ÏòÉÏ£¬´øµãÖÊµã´ø¸ºµç£¬
£¨2£©µ±µç¼üK¶Ï¿ªÊ±£¬µçÈÝÆ÷°å¼äµçѹΪU1=E£¬
´øµãÖʵ㴦ÓÚ¾²Ö¹×´Ì¬£¬ÊÜÁ¦Æ½ºâ£¬ÔòÓУº
mg=$q\frac{E}{d}$
±ÕºÏµç¼üKʱ£¬µçÈÝÆ÷Á½°å¼äµÄµçѹΪ£ºU2=$\frac{R}{r+R}$E=$\frac{3}{4}E$£®
¸ù¾ÝÅ£¶ÙµÚ¶þ¶¨Âɵãºa=$\frac{mg-\frac{3E}{4d}q}{m}=\frac{1}{4}g$
£¨3£©ÓÉÔ˶¯Ñ§¹«Ê½ÓУºv2=2a$•\frac{1}{2}$d
½âµÃ£ºv=$\frac{\sqrt{gd}}{2}$
´ð£º£¨1£©´øµçÖÊµã´ø¸ºµç£»
£¨2£©µç¼üK±ÕºÏʱ´øµçÖʵãµÄ¼ÓËÙ¶È´óСΪ$\frac{1}{4}g$£»
£¨3£©´øµçÖʵãÊ×´ÎÅöµ½¼«°åʱµÄËÙ¶ÈΪ$\frac{\sqrt{gd}}{2}$£®

µãÆÀ ±¾Ìâµç·Óëµç³¡¡¢Á¦Ñ§ÖªÊ¶µÄ×ۺϣ¬¹Ø¼üÊÇÈ·¶¨µçÈÝÆ÷Á½°å¼äµÄµçѹ£¬Çó³öСÇòµÄ¼ÓËÙ¶È£¬Äܸù¾ÝÔ˶¯Ñ§»ù±¾¹«Ê½Çó½â£¬ÄѶÈÊÊÖУ®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

7£®½«Ò»ÎïÌåÒÔijһ³õËÙ¶ÈÊúÖ±ÉÏÅ×£¬ÈçͼËùʾµÄËÄ·ùͼÖУ¬ÄÄÒ»·ùÄÜÕýÈ·±íʾÎïÌåÔÚÕû¸öÔ˶¯¹ý³ÌÖеÄÎ»ÒÆsÓëʱ¼ätµÄ¹ØÏµ£¨²»¼Æ¿ÕÆø×èÁ¦£©£¨¡¡¡¡£©
A£®B£®C£®D£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ

8£®ÈçͼËùʾ£¬ÏÖÓÐÒ»¸öÒÔOΪԲÐÄ¡¢ÒÔOP³¤Îª°ë¾¶µÄÔ²£¬ËıßÐÎABCDΪԲµÄÄÚ½ÓÕý·½ÐΣ¬a¡¢b¡¢c¡¢d·Ö±ðΪÕý·½ÐεÄËĸö±ßAB¡¢BC£¬CDºÍDAµÄÖе㣬P¡¢Q·Ö±ðΪ»¡ABºÍ»¡CDµÄÖе㣮ÏÖÔÚA¡¢B£¬C£¬DËĵã·Ö±ð·ÅÉϵÈÁ¿µÄÕýµçºÉºÍ¸ºµçºÉ£¬ÈôÈ¡ÎÞÇîÔ¶´¦µçÊÆÎªÁ㣬ÏÂÁÐ˵·¨ÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®OµãµÄµç³¡Ç¿¶ÈºÍµçÊÆ¾ùΪÁã
B£®°ÑͬһµçºÉ´ÓbµãÒÆµ½dµã£¬µç³¡Á¦×÷¹¦ÎªÁã
C£®°ÑͬһµçºÉ´ÓaµãÒÆµ½cµã£¬µç³¡Á¦×÷¹¦ÎªÁã
D£®Í¬Ò»µçºÉÔÚP¡¢QÁ½µãËùÊܵ糡Á¦Ïàͬ

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

5£®·¢¹â¶þ¼«¹ÜÊÇĿǰºÜ¶àÓõçÆ÷ָʾµÆµÄµç×ÓÔª¼þ£¬ÔÚµç·ÖеķûºÅÊÇÖ»ÓеçÁ÷´Ó±êÓС°+¡°ºÅµÄÒ»¶ËÁ÷È룬´Ó±êÓС°-¡°ºÅÒ»¶ËÁ÷³öʱ£¬Ëü²ÅÄÜ·¢¹â£¬Õâʱ¿É½«ËüÊÓΪһ¸ö´¿µç×裮ÏÖÓÐij³§¼ÒÌṩµÄijÖÖÐͺŵķ¢¹â¶þ¼«¹Ü£¬ÔÊÐíͨ¹ýµÄ×î´óµçÁ÷Ϊ56mA£¬ÕâÖÖÔª¼þµÄ·ü°²ÌØÐÔÇúÏßÈçͼ¼×Ëùʾ£®ÔÚÑо¿ËüµÄ·ü°²ÌØÐÔÇúÏßʵÑéÖУ¬¿ÉÑ¡ÓÃµÄÆ÷²ÄÓУº

´ý²â·¢¹â¶þ¼«¹Ü
Ö±Á÷µçÔ´E£¨µç¶¯ÊÆ4.5V£¬ÄÚ×è¿ÉÒÔºöÂÔ²»¼Æ£©
»¬¶¯±ä×èÆ÷R£¨×î´ó×èֵΪ20¦¸£©
µçѹ±íV1£¨Á¿³Ì10V£¬ÄÚ×èÔ¼50k¦¸£©
µçѹ±íV2£¨Á¿³Ì5V£¬ÄÚ×èÔ¼20k¦¸£©
µçÁ÷±íA1£¨Á¿³Ì100mA£¬ÄÚ×èÔ¼50¦¸£©
µçÁ÷±íA2£¨Á¿³Ì60mA£¬ÄÚ×èÔ¼100¦¸£©
µç¼üS¡¢µ¼ÏßÈô¸É
Ϊ׼ȷ¡¢·½±ãµØ½øÐÐʵÑ飬µçѹ±íӦѡÓÃV2£¬µçÁ÷±íӦѡÓÃA2£®£¨Ìî×Öĸ·ûºÅ£©
ÔÚÒÒͼ·½¿òÄÚ»­³öÉè¼ÆµÄʵÑéµç·ͼ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

12£®ÔÚ¾²µç³¡ÖУ¬µç×ÓÓÉaµãÔ˶¯µ½bµãµÄ¹ý³ÌÖУ¬¿Ë·þµç³¡Á¦×ö¹¦5eV£¬ÔòÏÂÁÐ˵·¨ÕýÈ·ÊÇ£¨¡¡¡¡£©
A£®µç³¡Ç¿¶È·½ÏòÒ»¶¨ÊÇÑØabÁ¬ÏßÇÒÓÉbµãÖ¸Ïòaµã·½Ïò
B£®µç×ӵĵçÊÆÄÜÔö¼ÓÁË5eV
C£®aµãµÄµçÊÆ±ÈbµãµÄµÍ
D£®ÓÉÓÚûÓÐÈ·¶¨ÁãµçÊÆµã£¬¹Ê²»ÄܱȽÏa¡¢bÁ½µãµÄµçÊÆ¸ßµÍ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

2£®ÏÂÁÐÓйØÔ­×ӽṹºÍÔ­×Ӻ˵ÄÈÏʶ£¬ÆäÖÐÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®¦Á¡¢¦Â¡¢¦ÃÈýÖÖÉäÏß¶¼ÊÇÁ£×ÓÁ÷
B£®ÇâÔ­×Ó·øÉä¹â×Óºó£¬ÆäÈÆºËÔ˶¯µÄµç×Ó¶¯ÄÜÔö´ó
C£®Ì«Ñô·øÉäÄÜÁ¿µÄÖ÷ÒªÀ´Ô´ÊÇÌ«ÑôÖз¢ÉúµÄÖØºËÁѱä
D£®${\;}_{83}^{210}Bi$µÄ°ëË¥ÆÚÊÇ5Ì죬100¿Ë${\;}_{83}^{210}Bi$¾­¹ý10Ììºó»¹Ê£ÏÂ50¿Ë

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

9£®°ë¾¶ÎªRµÄ²£Á§°ëÔ²ÖùÌ壬ºá½ØÃæÈçͼËùʾ£¬Ô²ÐÄΪO£®Á½ÌõƽÐе¥É«ºì¹âÑØ½ØÃæÉäÏòÔ²ÖùÃæ£¬·½ÏòÓëµ×Ãæ´¹Ö±£¬¹âÏß1µÄÈëÉäµãAΪԲÖùµÄ¶¥µã£¬¹âÏß2µÄÈëÉäµãΪB£¬¡ÏAOB=60¡ã£®ÒÑÖª¸Ã²£Á§¶Ôºì¹âµÄÕÛÉäÂÊ$n=\sqrt{3}$£®
£¨1£©¼ÆËãÁ½Ìõ¹âÏß¾­ÖùÃæºÍµ×ÃæÕÛÉäºóµÄ½»µãÓëOµãµÄ¾àÀëdÇÒ»­³ö¹â·ͼ£®
£¨2£©ÈôÈëÉäµÄÊǵ¥É«À¶¹â£¬Ôò¾àÀëd½«±ÈÉÏÃæÇóµÃµÄ½á¹û´ó»¹ÊÇС£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

6£®ÈçͼËùʾ£¬Í¼1¡¢Í¼2·Ö±ðÊÇÓα꿨³ßºÍÂÝÐý²â΢Æ÷µÄ¶ÁÊýʾÒâͼ£¬ÓÉͼʾ¿ÉÒÔÖªµÀËüÃǵĶÁÊý·Ö±ðÊÇ5.015cmºÍ10.295mm£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

20£®Ä³Í¬Ñ§Ó÷ü°²·¨²âÒ»½Ú¸Éµç³ØµÄµç¶¯ÊƺÍÄÚµç×裬ʵÑéµç·ͼÈçͼ¼×Ëùʾ£¬ÊµÑé¹ý³ÌÖиı们¶¯±ä×èÆ÷»¬Æ¬Î»ÖüǼÁù×éÊý¾Ý£¬È»ºó»­³öÈçͼÒÒËùʾµÄU-IͼÏ󣬸ù¾ÝͼÏó£¬¸Éµç³ØµÄµç¶¯ÊÆÎª1.45V£»ÄÚµç×èΪ0.69¦¸£»ÔÚ±¾ÊµÑéµç·Öе÷½Ú»¬¶¯±ä×èÆ÷RµÄ×èÖµ£¬µçÔ´µÄ×î´óÊä³ö¹¦ÂÊÊÇ0.76W£®£¨½á¹û±£ÁôСÊýµãºóÁ½Î»Êý×Ö£©

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸