ÌâÄ¿ÄÚÈÝ

ͼ¼×ËùʾΪ»ØÐý¼ÓËÙÆ÷µÄÔ­ÀíʾÒâͼ£¬Ò»¸ö±âÔ²ÖùÐεĽðÊôºÐ×Ó£¬ºÐ×Ó±»·Ö³ÉÁ½°ë£¨DÐε缫£©£¬·Ö±ðÓë¸ßѹ½»±äµçÔ´µÄÁ½¼«ÏàÁ¬£¬ÔÚÁÑ·ì´¦ÐγÉÒ»¸ö½»±äµç³¡£¬¸ßѹ½»Á÷µçÔ´µÄU-tͼÏóÈçͼÒÒËùʾ£¬Í¼ÖÐU£¨¡Á104V£©£¬t £¨¡Á10-7s£©£¬ÔÚÁ½DÐε缫ÁÑ·ìµÄÖÐÐÄ¿¿½üÆäÖÐÒ»¸öDÐκд¦ÓÐÒ»Àë×ÓÔ´K£¬DÐε缫λÓÚÔÈÇ¿´Å³¡ÖУ¬´Å³¡·½Ïò´¹Ö±ÓÚDÐε缫ËùÔÚƽÃ棬ÓÉÏÂÏòÉÏ£®´ÓÀë×ÓÔ´K·¢³öµÄ뮺ˣ¬Ôڵ糡×÷ÓÃÏ£¬±»¼ÓËÙ½øÈëºÐÖУ®ÓÖÓÉÓڴų¡µÄ×÷Óã¬ÑØ°ëÔ²ÐεĹìµÀÔ˶¯£¬²¢ÖØнøÈëÁѷ죮ÕâʱǡºÃ¸Ä±äµç³¡·½Ïò£¬ë®ºËÔڵ糡ÖÐÓÖÒ»´Î¼ÓËÙ£¬Èç´Ë²»¶ÏÑ­»·½øÐУ¬×îºóÔÚDÐκбßÔµ±»ÌØÊâ×°ÖÃÒý³ö£®£¨ºöÂÔ뮺ËÔÚÁÑ·ìÖÐÔ˶¯µÄʱ¼ä£©
£¨1£©Ð´³öͼÒÒËùʾµÄ¸ßѹ½»Á÷µçÔ´µÄ½»Á÷µçѹ˲ʱֵµÄ±í´ïʽ£»
£¨2£©½«´Ëµçѹ¼ÓÔÚ»ØÐý¼ÓËÙÆ÷ÉÏ£¬¸ø뮺˼ÓËÙ£¬ÔòÔÈÇ¿´Å³¡µÄ´Å¸ÐÇ¿¶ÈӦΪ¶àÉÙ£¿
£¨3£©ÈôҪʹ뮺˻ñµÃ5.00MeVµÄÄÜÁ¿£¬ÐèÒª¶àÉÙʱ¼ä£¿£¨Éè뮺ËÕýºÃÔÚµçѹ´ïµ½·åֵʱͨ¹ýDÐκеÄÏÁ·ì£©
£¨4£©DÐκеÄ×î´ó°ë¾¶R£®
·ÖÎö£º£¨1£©¸ù¾ÝͼµÄ×î´óÖµÓëÖÜÆÚ£¬¼°¿ªÊ¼¼Æʱµã£¬¼´¿ÉÇó½â£»
£¨2£©ÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉ£¬¼°ÂåÂ××ÈÁ¦ÓëÖÜÆÚ¹«Ê½£¬¼´¿ÉÇó½â£»
£¨3£©¸ù¾Ý뮺˻ñµÃµÄÄÜÁ¿£¬¿ÉÇó³ö±»¼ÓËٵĴÎÊý£¬½áºÏÖÜÆÚ£¬´Ó¶øÈ·¶¨Ô˶¯Ê±¼ä£»
£¨4£©¸ù¾Ý¶¯Äܱí´ïʽ£¬¼´¿ÉÈ·¶¨ÄÜÁ¿µÄ×î´óÖµ£¬ÓÉËÙÂÊÓë°ë¾¶µÄ¹Øϵ£¬¼´¿ÉÇó½â£®
½â´ð£º½â£º£¨1£©ÓÉͼ£ºUm=2.00¡Á106V£¬T=1.00¡Á10-7s
¡àu=Umsin(
2¦Ð
T
t+¦Ð)=2.00¡Á106sin(2.00¡Á107¦Ðt+¦Ð)

£¨2£©¡¢ë®ºËÔÚÔÈÇ¿´Å³¡ÖÐ×öÔÈËÙÔ²ÖÜÔ˶¯£¬ÓÉÅ£¶ÙµÚ¶þ¶¨ÂÉ£¬ÔòÓС¡¡¡qvB=m
v2
R

¶øÖÜÆÚ£¬TB=
2¦ÐR
v
=
2¦Ðm
qB

Óûʹ뮺ËÄܳÖÐø×öÔ²ÖÜÔ˶¯£¬½»Á÷µçµÄÖÜÆÚ±ØÐëΪ£ºT=T0
´Å³¡µÄ´Å¸ÐÇ¿¶È£ºB=
2¦Ðm
qT
=
2¦Ð¡Á2¡Á1.67¡Á10-27
1.6¡Á10-19¡Á1.00¡Á10-7
T=1.31T

£¨3£©¡¢ë®ºËÔÚDÐκÐÔ˶¯Ò»ÖÜʱ±»¼ÓËÙÁ½´Î£¬ë®ºË»ñµÃE=5.00MeVÄÜÁ¿£¬
¶ø±»¼ÓËٵĴÎÊýΪ£ºN=
E
qUm
=
5.00¡Á106¡Á1.6¡Á10-19
1.6¡Á10-19¡Á2.00¡Á106
=2.5

¼´ë®ºËÓ¦±»¼ÓËÙÁË3´Î                                       
ËùÐèµÄÔ˶¯Ê±¼äΪ£ºt=
3
2
T=1.5¡Á10-7s

£¨4£©¡¢ë®ºËµÄÄÜÁ¿×î´óʱ£¬ë®ºËÔ˶¯µÄ¹ìµÀ°ë¾¶×î´ó£ºEm=
1
2
m
v
2
m
=
1
2
m(
2¦ÐRm
T
)2

¡àRm=
T
2¦Ð
2Em
m
=
1.0¡Á10-7
2¦Ð
2¡Á5.00¡Á106¡Á1.6¡Á10-9
2¡Á1.67¡Á10-27
m=0.35m

´ð£º£¨1£©Ð´³öͼÒÒËùʾµÄ¸ßѹ½»Á÷µçÔ´µÄ½»Á÷µçѹ˲ʱֵµÄ±í´ïʽu=2¡Á106sin£¨2¡Á107¦Ðt+¦Ð£©V£»
£¨2£©½«´Ëµçѹ¼ÓÔÚ»ØÐý¼ÓËÙÆ÷ÉÏ£¬¸ø뮺˼ÓËÙ£¬ÔòÔÈÇ¿´Å³¡µÄ´Å¸ÐÇ¿¶ÈӦΪ1.31T£»
£¨3£©ÈôҪʹ뮺˻ñµÃ5.00MeVµÄÄÜÁ¿£¬ÐèÒª1.5¡Á10-7sʱ¼ä£»
£¨4£©DÐκеÄ×î´ó°ë¾¶0.35m£®
µãÆÀ£º¿¼²éÓÉͼÏóÀ´Êéд±í´ïʽ£¬×¢Ò⿪ʼ¼Æʱµã£»ÕÆÎÕÅ£¶ÙµÚ¶þ¶¨ÂÉÓëÔ²ÖÜÔ˶¯µÄ°ë¾¶¼°ÖÜÆÚ¹«Ê½£»Àí½â×î´ó¶¯ÄÜÓë°ë¾¶µÄ¹Øϵʽ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

ͼ¼×ËùʾΪ»ØÐý¼ÓËÙÆ÷µÄÔ­ÀíʾÒâͼ£¬Ò»¸ö±âÔ²ÖùÐεĽðÊôºÐ×Ó£¬ºÐ×Ó±»·Ö³ÉÁ½°ë£¨DÐε缫£©£¬·Ö±ðÓë¸ßѹ½»±äµçÔ´µÄÁ½¼«ÏàÁ¬£¬ÔÚÁÑ·ì´¦ÐγÉÒ»¸ö½»±äµç³¡£¬¸ßѹ½»Á÷µçÔ´µÄU£­tͼÏóÈçͼÒÒËùʾ£¬Í¼ÖÐU£¨¡Á104V£©£¬t (¡Á10£­7s)£¬ÔÚÁ½DÐε缫ÁÑ·ìµÄÖÐÐÄ¿¿½üÆäÖÐÒ»¸öDÐκд¦ÓÐÒ»Àë×ÓÔ´£Ë£¬DÐε缫λÓÚÔÈÇ¿´Å³¡ÖУ¬´Å³¡·½Ïò´¹Ö±ÓÚDÐε缫ËùÔÚƽÃ棬ÓÉÏÂÏòÉÏ¡£´ÓÀë×ÓÔ´K·¢³öµÄ뮺ˣ¬Ôڵ糡×÷ÓÃÏ£¬±»¼ÓËÙ½øÈëºÐÖУ®ÓÖÓÉÓڴų¡µÄ×÷Óã¬ÑØ°ëÔ²ÐεĹìµÀÔ˶¯£¬²¢ÖØнøÈëÁÑ·ì¡£ÕâʱǡºÃ¸Ä±äµç³¡·½Ïò£¬ë®ºËÔڵ糡ÖÐÓÖÒ»´Î¼ÓËÙ£¬Èç´Ë²»¶ÏÑ­»·½øÐУ¬×îºóÔÚDÐκбßÔµ±»ÌØÊâ×°ÖÃÒý³ö¡££¨ºöÂÔ뮺ËÔÚÁÑ·ìÖÐÔ˶¯µÄʱ¼ä£©

£¨1£©Ð´³öͼÒÒËùʾµÄ¸ßѹ½»Á÷µçÔ´µÄ½»Á÷µçѹ˲ʱֵµÄ±í´ïʽ£»

£¨2£©½«´Ëµçѹ¼ÓÔÚ»ØÐý¼ÓËÙÆ÷ÉÏ£¬¸ø뮺˼ÓËÙ£¬ÔòÔÈÇ¿´Å³¡µÄ´Å¸ÐÇ¿¶ÈӦΪ¶àÉÙ?

£¨3£©ÈôҪʹ뮺˻ñµÃ5.00MeVµÄÄÜÁ¿£¬ÐèÒª¶àÉÙʱ¼ä?£¨Éè뮺ËÕýºÃÔÚµçѹ´ïµ½·åֵʱͨ¹ýDÐκеÄÏÁ·ì£©

£¨4£©DÐκеÄ×î´ó°ë¾¶R¡£

ͼ¼×ËùʾΪ»ØÐý¼ÓËÙÆ÷µÄÔ­ÀíʾÒâͼ£¬Ò»¸ö±âÔ²ÖùÐεĽðÊôºÐ×Ó£¬ºÐ×Ó±»·Ö³ÉÁ½°ë£¨DÐε缫£©£¬·Ö±ðÓë¸ßѹ½»±äµçÔ´µÄÁ½¼«ÏàÁ¬£¬ÔÚÁÑ·ì´¦ÐγÉÒ»¸ö½»±äµç³¡£¬¸ßѹ½»Á÷µçÔ´µÄU-tͼÏóÈçͼÒÒËùʾ£¬Í¼ÖÐU£¨×104V£©£¬t £¨×10-7s£©£¬ÔÚÁ½DÐε缫ÁÑ·ìµÄÖÐÐÄ¿¿½üÆäÖÐÒ»¸öDÐκд¦ÓÐÒ»Àë×ÓÔ´K£¬DÐε缫λÓÚÔÈÇ¿´Å³¡ÖУ¬´Å³¡·½Ïò´¹Ö±ÓÚDÐε缫ËùÔÚƽÃ棬ÓÉÏÂÏòÉÏ£®´ÓÀë×ÓÔ´K·¢³öµÄ뮺ˣ¬Ôڵ糡×÷ÓÃÏ£¬±»¼ÓËÙ½øÈëºÐÖУ®ÓÖÓÉÓڴų¡µÄ×÷Óã¬ÑØ°ëÔ²ÐεĹìµÀÔ˶¯£¬²¢ÖØнøÈëÁѷ죮ÕâʱǡºÃ¸Ä±äµç³¡·½Ïò£¬ë®ºËÔڵ糡ÖÐÓÖÒ»´Î¼ÓËÙ£¬Èç´Ë²»¶ÏÑ­»·½øÐУ¬×îºóÔÚDÐκбßÔµ±»ÌØÊâ×°ÖÃÒý³ö£®£¨ºöÂÔ뮺ËÔÚÁÑ·ìÖÐÔ˶¯µÄʱ¼ä£©
£¨1£©Ð´³öͼÒÒËùʾµÄ¸ßѹ½»Á÷µçÔ´µÄ½»Á÷µçѹ˲ʱֵµÄ±í´ïʽ£»
£¨2£©½«´Ëµçѹ¼ÓÔÚ»ØÐý¼ÓËÙÆ÷ÉÏ£¬¸ø뮺˼ÓËÙ£¬ÔòÔÈÇ¿´Å³¡µÄ´Å¸ÐÇ¿¶ÈӦΪ¶àÉÙ£¿
£¨3£©ÈôҪʹ뮺˻ñµÃ5.00MeVµÄÄÜÁ¿£¬ÐèÒª¶àÉÙʱ¼ä£¿£¨Éè뮺ËÕýºÃÔÚµçѹ´ïµ½·åֵʱͨ¹ýDÐκеÄÏÁ·ì£©
£¨4£©DÐκеÄ×î´ó°ë¾¶R£®

Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com

¾«Ó¢¼Ò½ÌÍø