´óѧÎïÀíµç´Åѧ

ÎÊ´ðÌâ

1015.¾²µçѧÖÐÓÐÏÂÃ漸¸ö³£¼ûµÄ³¡Ç¿¹«Ê½£º

E?F/q (1) E = q / (4??0r2) (2)

E = (UA£­UB) / l (3)

ÎÊ£º1£®Ê½(1)¡¢(2)ÖеÄqÒâÒåÊÇ·ñÏàͬ? 2£®¸÷ʽµÄÊÊÓ÷¶Î§ÈçºÎ£¿

´ð£º1. (1)¡¢(2) Á½Ê½ÖеÄqÒâÒ岻ͬ£®(1) ʽÖеÄqÊÇÖÃÓÚ¾²µç³¡ÖÐÊܵ½µç³¡Á¦

×÷ÓõÄÊÔÑéµçºÉ£»(2)ÖеÄqÊDzúÉúµç³¡µÄ³¡Ô´µçºÉ£® 2·Ö

2. ʽ(1)Êdz¡Ç¿µÄ¶¨Òåʽ£¬ÆÕ±éÊÊÓã»

ʽ(2)ÊÊÓÃÓÚÕæ¿ÕÖеãµçºÉµÄµç³¡£¨»ò¾ùÔÈ´øµçÇòÃæÍâ»ò¾ùÔÈ´øµçÇòÌåÍâµÄµç³¡£©£»

??? ʽ(3)½öÊÊÓÃÓÚ¾ùÔȵ糡£¬ÇÒAµãºÍBµãµÄÁ¬ÏßÓ볡ǿEƽÐÐ.¶øl?AB.

3·Ö

1295.µçºÉΪq1µÄÒ»¸öµãµçºÉ´¦ÔÚÒ»¸ß˹ÇòÃæµÄÖÐÐÄ´¦£¬ÎÊÔÚÏÂÁÐÈýÖÖÇé¿öÏ£¬´©¹ý´Ë¸ß˹ÃæµÄµç³¡Ç¿¶ÈͨÁ¿ÊÇ·ñ»á¸Ä±ä£¿µç³¡Ç¿¶ÈͨÁ¿¸÷ÊǶàÉÙ£¿

(1) ½«µçºÉΪq2µÄµÚ¶þ¸öµãµçºÉ·ÅÔÚ¸ß˹ÃæÍâµÄ¸½½ü´¦£» (2) ½«ÉÏÊöµÄq2·ÅÔÚ¸ß˹ÃæÄÚµÄÈÎÒâ´¦£» (3) ½«Ô­À´µÄµãµçºÉÒÆÀë¸ß˹ÃæµÄÇòÐÄ£¬µ«ÈÔÔÚ¸ß˹ÃæÄÚ£®

´ð£º¸ù¾Ý¸ß˹¶¨Àí£¬´©¹ý¸ß˹ÃæµÄµçͨÁ¿½öÈ¡¾öÓÚÃæÄÚµçÁ¿µÄ´úÊýºÍ£¬¶øÓëÃæÄÚµçºÉµÄ·Ö²¼Çé¿ö¼°ÃæÍâµçºÉÎ޹أ¬¹Ê£º

(1) µçͨÁ¿²»±ä£¬ ?1£½q1 / ?0£» 2·Ö (2) µçͨÁ¿¸Ä±ä£¬ÓÉ?1±äΪ?2£½(q1£«q2 ) / ?0£» 2·Ö (3) µçͨÁ¿²»±ä£¬ÈÔΪ?1£® 1·Ö

1030.È·¶¨¾²µç³¡ÖÐijµãµÄµçÊÆ£¬ÎªÊ²Ã´±ØÐëÑ¡¶¨Ò»¸öµçÊÆÁãµã£¿ ´ð£º¾²µç³¡ÖÐijµãµçÊÆÔÚÊýÖµÉϵÈÓÚµ¥Î»ÕýµçºÉÖÃÓڸõãËù¾ßÓеĵçÊÆÄÜ£®µçÊÆÄܵĸıäÊÇÒԵ糡Á¦×÷¹¦À´¶ÈÁ¿µÄ£¬µçÊÆÄÜÖ»ÊÇÒ»¸öÏà¶ÔµÄÁ¿£¬Òò¶øµçÊÆÒ²ÊÇÒ»¸öÏà¶ÔµÄÁ¿£¬¹Ê±ØÐëÑ¡¶¨Ò»¸öµçÊÆÁãµã£¬¶ø¾²µç³¡ÖÐijµãµÄµçÊƾ͵ÈÓڸõãÓëµç

ÊÆÁãµãÖ®¼äµÄµçÊƲ 5·Ö

1029.¾²µç³¡ÖмÆËãµçÊƲîµÄ¹«Ê½ÓÐÏÂÃ漸¸ö£º

UA?UB?WA?WB (1) qUA?UB?Ed (2)

?B?UA?UB??E?dl (3)

AÊÔ˵Ã÷¸÷ʽµÄÊÊÓÃÌõ¼þ£®

´ð£º(1)ʽΪµçÊƲîµÄ¶¨Òåʽ£¬ÆÕ±éÊÊÓÃ. 1·Ö B?(2)ʽֻÊÊÓÃÓÚ¾ùÔȵ糡£¬ÆäÖÐdΪA¡¢BÁ½µãÁ¬ÏßµÄ E¾àÀëÔÚƽÐÐÓÚµçÁ¦Ïß·½ÏòÉϵÄͶӰ£¨Èçͼ£©£® 2·Ö Ad (3)ʽΪ³¡Ç¿ÓëµçÊƲî¼äµÄ»ù±¾¹Øϵʽ£¬ÆÕ±éÊÊ

Óã® 2·Ö

1068.ÊÔÊö¾²µç³¡µÄ»·Â·¶¨Àí£¬²¢ËµÃ÷ÆäÒâÒ壮

???´ð£º¾²µç³¡Öг¡Ç¿EÑØÈÎÒâ±ÕºÏ·¾¶µÄÏß»ý·ÖµÈÓÚÁ㣮ÆäÊýѧ±í´ïʽΪ?E?dl?0.Ëü±íʾ

LÔÚ¾²µç³¡Öаѵ¥Î»ÕýµçºÉ´Óijµã³ö·¢¾­ÈÎÒâ±ÕºÏ·¾¶»Øµ½Ô­

À´Î»Ö㬾²µç³¡Á¦×÷¹¦µÈÓÚÁã. Õâ±íÃ÷¾²µç³¡ÊDZ£ÊØÁ¦³¡£® 5·Ö

?? 5101. (1) µç³¡Ç¿¶ÈµÄÏß»ý·Ö?E?dl±íʾʲôÎïÀíÒâÒ壿

LL (2) ¶ÔÓÚ¾²µç³¡£¬ËüÓÐʲôÌص㣿¸ÃÏß»ý·ÖÃèÊö¾²µç³¡µÄʲôÐÔÖÊ£¿

??´ð£º(1) ?E?dlÔÚÊýÖµÉϱíʾµ¥Î»ÕýµçºÉÔڵ糡ÖÐÑØ×ÅL·¾¶Òƶ¯Ê±£¬µç³¡Á¦¶Ô

Ëü×öµÄ¹¦£® 2·Ö (2) ¶Ô¾²µç³¡ÇéÐΣ¬ËüµÄÊýÖµÓëLµÄ¾ßÌå·¾¶Î޹أ¬¶øÖ»ÓëLµÄʼĩλÖÃÓÐ

¹Ø£¬ËüµÈÓÚʼ¡¢Ä©Á½µã¼äµÄµçÊƲ 2·Ö

Õâ±íʾ¾²µç³¡ÊDZ£ÊØÁ¦³¡£¬¼´ÓÐÊƳ¡£® 1·Ö

1287.ΪʲôÔÚÎÞµçºÉµÄ¿Õ¼äÀïµç³¡Ïß²»ÄÜÏཻ£¿

´ð£ºÓÉʵÑéºÍÀíÂÛÖªµÀ£¬¾²µç³¡ÖÐÈÎÒ»¸ø¶¨µãÉÏ£¬³¡Ç¿ÊÇΨһȷ¶¨µÄ£¬¼´Æä´óСºÍ·½Ïò¶¼ÊÇÈ·¶¨µÄ£®Óõ糡ÏßÐÎÏóÃèÊö¾²µç³¡µÄ¿Õ¼ä·Ö²¼Ê±£¬µç³¡ÏßÉÏÈÎÒ»µãµÄÇÐÏß·½Ïò±íʾ¸ÃµãµÄ³¡Ç¿·½Ïò£®Èç¹ûÔÚÎÞµçºÉµÄ¿Õ¼äÀïijһµãÉÏÓм¸Ìõµç³¡ÏßÏཻµÄ»°£¬Ôò¹ý´Ë½»µã¶ÔÓ¦ÓÚÿһÌõµç³¡Ï߶¼¿É×÷³öÒ»ÌõÇÐÏߣ¬ÕâÒâζ׎»µã´¦µÄ³¡Ç¿Óкü¸¸ö·½Ïò£¬ÕâÓë¾²µç³¡ÖÐÈÎÒ»¸ø¶¨µã³¡Ç¿¾ßÓÐΨһȷ¶¨·½ÏòÏàì¶Ü£¬¹Ê

ÎÞµçºÉµÄ¿Õ¼äÀïµç³¡Ïß²»ÄÜÏཻ£® 5·Ö

5455.ÓÐÈËÈÏΪµçÊƲ»ÎªÁãµÄµ¼ÌåÉÏ£¬²»¿ÉÄÜͬʱ´øÓÐÒìºÅÃæµçºÉ·Ö²¼£®ÕâÖÖ˵·¨¶Ô²»¶Ô£¿ÈçÓдíÎóÇëÖ¸³ö²¢¾ÙÀý˵Ã÷£®

´ð£º´íÎó£® 1·Ö BBµçÊÆÖµ²»ÎªÁãµÄµ¼ÌåÉÏ£¬ÊÇ·ñ´øÓÐÒìºÅÃæµçºÉÓë

ÆäÖÜΧ´øµçÌåÇé¿öÓйأ¬È磺 2·Ö (a)A(b)A (a) Ô­À´²»´øµçµ¼ÌåÇ»BÄÚ£¬·ÅÓдøÕýµçµÄÎïÌåAʱ£¬B´øÒìºÅÃæµçºÉ£¬µ«UB > 0£® AB (b) Ô­À´²»´øµçµÄµ¼Ìå¿ÇBÄÚ£¬·ÅÓдø¸ºµçµÄÎï(c) ÌåAʱ£¬B´øÒìºÅµÄÃæµçºÉ£¬µ«UB < 0£®

(c) Ô­À´²»´øµçµÄµ¼ÌåBÅÔ·ÅÓдøÕý(»ò¸º)µçÎïÌåAʱ£¬B´øÒìºÅµÄÃæµçºÉ£¬µ«UB > 0 (»òUB <

0 )£® 2·Ö

2011.Ò»Ìõ´Å¸ÐÏßÉϵÄÈÎÒâ¶þµã´¦µÄ´Å¸ÐÇ¿¶ÈÒ»¶¨´óСÏàµÈô£¿ÎªÊ²Ã´£¿

´ð£º²»Ò»¶¨ÏàµÈ£® 2·Ö

ÒòΪÕâÁ½µã´¦¸½½üÆäËü´Å¸ÐÏß·Ö²¼²»Ò»¶¨Ïàͬ£¬Ò²¼´Á½µã´¦¸½½üµ¥Î»Ãæ»ýÉϴŸÐÏߵĸù

Êý²»Ò»¶¨ÏàµÈ£® 3·Ö

2254.Ϊʲô²»ÄܰѴų¡×÷ÓÃÓÚÔ˶¯µçºÉµÄÁ¦µÄ·½Ïò£¬¶¨ÒåΪ´Å¸ÐÇ¿¶ÈµÄ·½Ïò£¿ ´ð£ºÒòΪ´ÅÁ¦µÄ·½Ïò»¹ËæµçºÉÔ˶¯Ëٶȷ½Ïò¶ø²»Í¬£¬Òò¶øÔڴų¡ÖÐͬһµãÔ˶¯µçºÉÊÜÁ¦µÄ·½ÏòÊDz»È·¶¨µÄ£® 5·Ö

2057.½«Ò»³¤Ö±Ï¸ÂÝÏß¹ÜÍä³É»·ÐÎÂÝÏ߹ܣ¬ÎʹÜÄڴų¡Óкα仯£¿ ´ð£ºÏ¸³¤Ö±Ï¸ÂÝÏß¹ÜÄڴ󲿷ַ¶Î§µÄ´Å³¡ÊǾùÔȳ¡, Íä³É»·ÐÎÂÝÏ߹ܺó, ¹ÜÄÚµÄ

´Å³¡´¦´¦ÊǷǾùÔȳ¡. 3·Ö

»·µÄÖÐÐÄÏßÉϵĸ÷µã´Å¸ÐÇ¿¶È´óСÓ볤ֱϸÂÝÏß¹ÜÄڴŸÐÇ¿¶È´óСÏàµÈ, µ«·½Ïò¸÷²»Ïàͬ(ÑØÇÐÏß·½Ïò), ÔÚ»·¹Üºá½ØÃæÉϸ÷µã´Å¸ÐÇ¿¶È´óС²»µÈ(¶ø·½ÏòÏàͬ).

2·Ö

2450.ÅжÏÏÂÁÐ˵·¨ÊÇ·ñÕýÈ·£¬²¢ËµÃ÷ÀíÓÉ£º

ÈôËùȡΧÈƳ¤Ö±ÔØÁ÷µ¼ÏߵĻý·Ö·¾¶ÊDZպϵģ¬µ«²»ÊÇÔ²£¬°²Å໷·¶¨ÀíÒ²³ÉÁ¢£® ÈôΧÈƳ¤Ö±ÔØÁ÷µ¼ÏߵĻý·Ö·¾¶ÊDZպϵģ¬µ«²»ÔÚÒ»¸öƽÃæÄÚ£¬Ôò°²Å໷·¶¨Àí²»³ÉÁ¢£® ´ð£ºµÚһ˵·¨¶Ô£¬µÚ¶þ˵·¨²»¶Ô£® 2·Ö

¡ßΧÈƵ¼ÏߵĻý·Ö·¾¶Ö»ÒªÊDZպϵģ¬²»¹ÜÔÚ²»ÔÚͬһƽÃæÄÚ£¬Ò²²»¹ÜÊÇ·ñÊÇÔ²£¬°²Å໷·¶¨Àí¶¼³ÉÁ¢£® 3·Ö

2574.ÈçͼËùʾ£¬»·ÈÆÒ»¸ùÓÐÏÞ³¤µÄÔØÁ÷Ö±µ¼ÏßÓÐÒ»»Ø·c£¬ÎʶÔÓÚcÄÜ

I·ñʹÓð²Å໷·¶¨Àí£¿ÊÔ˵Ã÷ÀíÓÉ£®

´ð£º¶Ôc²»ÄÜʹÓð²Å໷·¶¨Àí¡£

c2·Ö

°²Å໷·¶¨ÀíÖ»ÊÊÓÃÓÚÎȺãµçÁ÷£¬Õâ¾ÍÒªÇóÔØÁ÷µ¼Ïß»ò±ÕºÏ£¬»òÉìÕ¹µ½

ÎÞÏÞÔ¶£®¸ÃÌâÖиøµÄÊÇÓÐÏÞ³¤µÄµ¼Ïߣ¬ÆäÖÐÊDz»ÄÜά³ÖÎȺãµçÁ÷µÄ£®Èô¶ÔÆä

ʹÓð²Å໷·¶¨Àí£¬ÄÇôͬÊÇÒÔcΪ±ß½çµÄÇúÃ棬Óеľͱ»µçÁ÷´©¹ý£¬¶øÓÐ

µÄÓÖ²»±»µçÁ÷´©¹ý£¬Õâ¾Í²úÉúÁËì¶Ü£® 3·Ö

ÁªÏµ¿Í·þ£º779662525#qq.com(#Ì滻Ϊ@)