£¨2005?±±¾©£©Á½¿é½ðÊô°åa¡¢bƽÐзÅÖ㬰å¼ä´æÔÚÓëÔÈÇ¿µç³¡Õý½»µÄÔÈÇ¿´Å³¡£¬¼ÙÉèµç³¡¡¢´Å³¡Ö»´æÔÚÓÚÁ½°å¼äµÄ¿Õ¼äÇøÓò£®Ò»Êøµç×ÓÒÔÒ»¶¨µÄ³õËÙ¶Èv0´ÓÁ½¼«°åÖм䣬ÑØ´¹Ö±Óڵ糡¡¢´Å³¡µÄ·½ÏòÉäÈ˳¡ÖУ¬ÎÞƫתµØͨ¹ý³¡Çø£¬ÈçͼËùʾ£®ÒÑÖª°å³¤l=10cm£¬Á½°å¼ä¾àd=3.0cm£¬Á½°å¼äµçÊƲîU=150V£¬v0=2.0¡Á107m/s£®
£¨1£©Çó´Å¸ÐӦǿ¶ÈBµÄ´óС£»
£¨2£©Èô³·È¥´Å³¡£¬Çóµç×Ó´©¹ýµç³¡Ê±Æ«ÀëÈËÉä·½ÏòµÄ¾àÀ룬ÒÔ¼°µç×Óͨ¹ý³¡Çøºó¶¯ÄÜÔö¼Ó¶àÉÙ£¿£¨µç×ÓËù´øµçºÉÁ¿µÄ´óСÓëÆäÖÊÁ¿Ö®±Èe/m=1.76¡Á1011C/kg£¬µç×ÓµçºÉÁ¿µÄ´óСe=1.60¡Á10-19C£©
·ÖÎö£º£¨1£©µç×Ó´¹Ö±½øÈëÕý½»µÄÔÈÇ¿µç³¡ºÍÔÈÇ¿´Å³¡£¬µç×ÓÎÞƫתµÄͨ¹ý´Å³¡£¬Á£×Ó×öÔÈËÙÖ±ÏßÔ˶¯£¬µç³¡Á¦ºÍÂåÂ××ÈÁ¦Æ½ºâ£¬Ó¦ÓöþÁ¦Æ½ºâ¼´¿ÉµÃ³ö´Å³¡Ç¿¶ÈµÄ´óС£®
£¨2£©³·È¥´Å³¡ºó£¬Á£×ÓÔڵ糡Á¦×÷ÓÃÏÂ×öÀàƽÅ×Ô˶¯£¬ÔÚÑص糡·½ÏòÉÏ£¬µç×Ó×ö³õËÙ¶ÈΪÁãµÄÔȼÓËÙÖ±ÏßÔ˶¯£¬ÓÉÔ˶¯Ñ§¹«Ê½¿ÉÇó³öÔڵ糡·½ÏòµÄλÒÆ£®¶¯ÄܵÄÔ­ÒòÊǵ糡Á¦×ö¹¦£¬Óɶ¯Äܶ¨Àí¿ÉÇó³ö¶¯ÄܵÄÔö¼ÓÁ¿£®
½â´ð£º½â£º
£¨1£©µç×Ó½øÈËÕý½»µÄµç´Å³¡²»·¢Éúƫת£¬Êܵ½µÄÂåÂ××ÈÁ¦ºÍµç³¡Á¦Æ½ºâ£¬ÔòÓУº
Bev0=e
U
d

½âµÃ£º
B=
U
v0d
=2.5¡Á10-4T

£¨2£©µç×ÓÖ»Ôڵ糡ÖÐÔ˶¯£¬Ôڵ糡Á¦µÄ×÷ÓÃϽ«ÏòÏÂƫת£¬Éèµç×Óͨ¹ý³¡ÇøƫתµÄ¾àÀëΪy1ÔòÓУº
y1=
1
2
at2=
1
2
eU
md
?
l2
v
2
0
=1.1¡Á10-2m

¶¯ÄܵÄÔö¼Ó¼´Îªµç³¡Á¦¶Ôµç×ÓËù×öµÄ¹¦£¬Îª
¡÷EK=eEy1=e
U
d
y1=8.8¡Á10-18J=55eV
£®
´ð£º£¨1£©´Å¸ÐӦǿ¶ÈBµÄ´óСΪ2.5¡Á10-4T£»
    £¨2£©Èô³·È¥´Å³¡£¬µç×Ó´©¹ýµç³¡Ê±Æ«ÀëÈËÉä·½ÏòµÄ¾àÀëΪ1.1¡Á10-2m£¬µç×Óͨ¹ý³¡Çøºó¶¯ÄÜÔö¼Ó55eV£®
µãÆÀ£ºÒªÕýÈ·¡¢Ñ¸ËٵĽâ¾ö´øµçÁ£×ÓÔÚ¸´ºÏ³¡ÖеÄÔ˶¯ÀàÐÍ£¬Ê×ÏȱØÐëҪŪÇåÎïÀíÇé¾³£¬¼´ÔÚÍ·ÄÔÖгÊÏֿ͹ÛÊÂÎïµÄÔ˶¯È«¹ý³Ì£¬¶ÔÎÊÌâµÄÇé¾³Ô­ÐͽøÐоßÌå³éÏ󣬴Ӷø½¨Á¢ÆðÕýÈ·¡¢ÇåÎúµÄÎïÀíÇé¾³£®Æä¶þ¡¢Ó¦¶ÔÎïÀí֪ʶÓÐÈ«ÃæÉîÈëµÄÀí½â£¬ÊìÁ·ÕÆÎÕÂåÂ××ÈÁ¦¡¢µç³¡Á¦¼°ÖØÁ¦µÄ×ö¹¦Ìص㼰¶ÔÁ£×ÓÔ˶¯µÄÓ°Ï죮ÆäÈý¡¢ÊìÁ·ÕÆÎÕÔ˶¯Ñ§ÖªÊ¶ÊÇ˳Àû½â¾öÎïÀíÎÊÌâµÄÓÐЧ¸¨ÖúÊֶΣ®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2005?±±¾©£©Í¼Êǵ¼¹ìʽµç´ÅÅÚʵÑé×°ÖÃʾÒâͼ£®Á½¸ùƽÐг¤Ö±½ðÊôµ¼¹ìÑØˮƽ·½Ïò¹Ì¶¨£¬Æä¼ä°²·Å½ðÊô»¬¿é£¨¼´ÊµÑéÓõ¯Í裩£®»¬¿é¿ÉÑص¼¹ìÎÞĦ²Á»¬ÐУ¬ÇÒʼÖÕÓëµ¼¹ì±£³ÖÁ¼ºÃ½Ó´¥£®µçÔ´ÌṩµÄÇ¿´óµçÁ÷´ÓÒ»¸ùµ¼¹ìÁ÷È룬¾­¹ý»¬¿é£¬ÔÙ´ÓÁíÒ»µ¼¹ìÁ÷»ØµçÔ´£®»¬¿é±»µ¼¹ìÖеĵçÁ÷ÐγɵĴų¡Íƶ¯¶ø·¢É䣮ÔÚ·¢Éä¹ý³ÌÖУ¬¸Ã´Å³¡ÔÚ»¬¿éËùÔÚλÖÃʼÖÕ¿ÉÒÔ¼ò»¯ÎªÔÈÇ¿´Å³¡£¬·½Ïò´¹Ö±ÓÚÖ½Ã棬ÆäÇ¿¶ÈÓëµçÁ÷µÄ¹ØϵΪB=kI£¬±ÈÀý³£Á¿k=2.5¡Á10-6T/A£®ÒÑÖªÁ½µ¼¹ìÄÚ²à¼ä¾àl=1.5cm£¬»¬¿éµÄÖÊÁ¿m=30g£¬»¬¿éÑص¼¹ì»¬ÐÐ5mºó»ñµÃµÄ·¢ÉäËÙ¶Èv=3.0km/s£¨´Ë¹ý³ÌÊÓΪÔȼÓËÙÔ˶¯£©£®
£¨1£©Çó·¢Éä¹ý³ÌÖеçÔ´ÌṩµÄµçÁ÷Ç¿¶È£®
£¨2£©ÈôµçÔ´Êä³öµÄÄÜÁ¿ÓÐ4%ת»»Îª»¬¿éµÄ¶¯ÄÜ£¬Ôò·¢Éä¹ý³ÌÖеçÔ´µÄÊä³ö¹¦ÂʺÍÊä³öµçѹ¸÷ÊǶà´ó£¿
£¨3£©Èô´Ë»¬¿éÉä³öºóËæ¼´ÒÔËÙ¶ÈvÑØˮƽ·½Ïò»÷ÖзÅÔÚˮƽÃæÉϵÄÉ°Ï䣬ËüǶÈëÉ°ÏäµÄÉî¶ÈΪs¡ä£®ÉèÉ°ÏäÖÊÁ¿ÎªM£¬»¬¿éÖÊÁ¿Îªm£¬²»¼ÆÉ°ÏäÓëˮƽÃæÖ®¼äµÄĦ²Á£®Ç󻬿é¶ÔÉ°Ïäƽ¾ù³å»÷Á¦µÄ±í´ïʽ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2005?±±¾©£©½üÆÚ¡¶¿Æѧ¡·ÖÐÎÄ°æµÄÎÄÕ½éÉÜÁËÒ»ÖÖм¼Êõ--º½Ìì·ÉÀ£¬º½Ìì·ÉÀÂÊÇÓÃÈáÐÔÀÂË÷½«Á½¸öÎïÌåÁ¬½ÓÆðÀ´ÔÚÌ«¿Õ·ÉÐеÄϵͳ£®·ÉÀÂϵͳÔÚÌ«¿Õ·ÉÐÐÖÐÄÜΪ×ÔÉíÌṩµçÄܺÍÍÏÒ·Á¦£¬Ëü»¹ÄÜÇåÀí¡°Ì«¿ÕÀ¬»ø¡±µÈ£®´Ó1967ÄêÖÁ1999ÄêµÄ17´ÎÊÔÑéÖУ¬·ÉÀÂϵͳÊÔÑéÒÑ»ñµÃ²¿·Ö³É¹¦£®¸ÃϵͳµÄ¹¤×÷Ô­Àí¿ÉÓÃÎïÀíѧµÄ»ù±¾¶¨ÂÉÀ´½âÊÍ£®ÈçͼΪ·ÉÀÂϵͳµÄ¼ò»¯Ä£ÐÍʾÒâͼ£¬Í¼ÖÐÁ½¸öÎïÌåP¡¢QµÄÖÊÁ¿·Ö±ðΪmP¡¢mQ£¬ÈáÐÔ½ðÊôÀÂË÷³¤Îªl£¬ÍâÓоøÔµ²ã£¬ÏµÍ³ÔÚ½üµØ¹ìµÀ×÷Ô²ÖÜÔ˶¯£®Ô˶¯¹ý³ÌÖÐQ¾àµØÃæ¸ßΪh£®ÉèÀÂË÷×ܱ£³ÖÖ¸ÏòµØÐÄ£¬PµÄËÙ¶ÈΪvP£®ÒÑÖªµØÇò°ë¾¶ÎªR£¬µØÃæµÄÖØÁ¦¼ÓËÙ¶ÈΪg£®
£¨1£©·ÉÀÂϵͳÔڵشų¡ÖÐÔ˶¯£¬µØ´Å³¡ÔÚÀÂË÷ËùÔÚ´¦µÄ´Å¸ÐӦǿ¶È´óСΪB£¬·½Ïò´¹Ö±ÓÚÖ½ÃæÏòÍ⣮ÉèÀÂË÷ÖÐÎÞµçÁ÷£¬ÎÊÀÂË÷P¡¢QÄĶ˵çÊƸߣ¿´ËÎÊÖпÉÈÏΪÀÂË÷¸÷´¦µÄËٶȾù½üËƵÈÓÚvP£¬ÇóP¡¢QÁ½¶ËµÄµçÊƲ
£¨2£©ÉèÀÂË÷µÄµç×èΪR1£¬Èç¹ûÀÂË÷Á½¶ËÎïÌåP¡¢Qͨ¹ýÖÜΧµÄµçÀë²ã·ÅµçÐγɵçÁ÷£¬ÏàÓ¦µÄµç×èΪR2£¬ÇóÀÂË÷ËùÊܵݲÅàÁ¦¶à´ó£»
£¨3£©ÇóÀÂË÷¶ÔQµÄÀ­Á¦FQ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2005?±±¾©£©ÏÂÑ©Ì죬¿¨³µÔÚ±ÊÖ±µÄ¸ßËÙ¹«Â·ÉÏÔÈËÙÐÐÊ»£®Ë¾»úͻȻ·¢ÏÖÇ°·½Í£×ÅÒ»Á¾¹ÊÕϳµ£¬Ëû½«É²³µ²Èµ½µ×£¬³µÂÖ±»±§ËÀ£¬µ«¿¨³µÈÔÏòÇ°»¬ÐУ¬²¢×²ÉϹÊÕϳµ£¬ÇÒÍÆ×ÅËü¹²Í¬»¬ÐÐÁËÒ»¶Î¾àÀëlºóͣϣ®Ê¹ʷ¢Éúºó£¬¾­²âÁ¿£¬¿¨³µÉ²³µÊ±Óë¹ÊÕϳµ¾àÀëΪL£¬×²³µºó¹²Í¬»¬ÐеľàÀël=
8
25
L
£®¼Ù¶¨Á½³µÂÖÌ¥ÓëÑ©µØÖ®¼äµÄ¶¯Ä¦²ÁÒòÊýÏàͬ£®ÒÑÖª¿¨³µÖÊÁ¿MΪ¹ÊÕϳµÖÊÁ¿mµÄ4±¶£®
£¨1£©É迨³µÓë¹ÊÕϳµÏàײǰµÄËÙ¶ÈΪv1£¬Á½³µÏàײºóµÄËٶȱäΪv2£¬Çó
v1
v2

£¨2£©¿¨³µË¾»úÖÁÉÙÔÚ¾à¹ÊÕϳµ¶àÔ¶´¦²ÉȡͬÑùµÄ½ô¼±É²³µ´ëÊ©£¬Ê¹ʾÍÄÜÃâÓÚ·¢Éú£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2005?±±¾©£©ÔÚÏÂÁи÷×éµÄÁ½¸öÏÖÏóÖж¼±íÏÖ³ö¹â¾ßÓв¨¶¯ÐÔµÄÊÇ£¨¡¡¡¡£©

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸