ÌâÄ¿ÄÚÈÝ

11£®ÈçͼËùʾ£¬¿Õ¼ä´æÔÚ×ã¹»´ó¡¢Õý½»µÄÔÈÇ¿µç¡¢´Å³¡£¬µç³¡Ç¿¶ÈΪE¡¢·½ÏòÊúÖ±ÏòÏ£¬´Å¸ÐӦǿ¶ÈΪB¡¢·½Ïò´¹Ö±Ö½ÃæÏòÀ´Óµç¡¢´Å³¡ÖÐijµãPÓɾ²Ö¹ÊÍ·ÅÒ»¸öÖÊÁ¿Îªm¡¢´øµçÁ¿Îª+qµÄÁ£×Ó£¨Á£×ÓÊܵ½µÄÖØÁ¦ºöÂÔ²»¼Æ£©£¬ÆäÔ˶¯¹ì¼£ÈçͼÐéÏßËùʾ£¬¶ÔÓÚ´øµçÁ£×ÓÔڵ硢´Å³¡ÖÐÏÂÂäµÄ×î´ó¸ß¶ÈH£¬ÏÂÃæ¸ø³öÁËËĸö±í´ïʽ£¬ÓÃÄãÒÑÓеÄ֪ʶ¼ÆËã¿ÉÄÜ»áÓÐÀ§ÄÑ£¬µ«Äã¿ÉÒÔÓÃѧ¹ýµÄ֪ʶ¶ÔÏÂÃæµÄËĸöÑ¡Ïî×ö³öÅжϣ¬ÄãÈÏΪÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®$\frac{mB}{2Eq}$B£®$\frac{mE}{2{B}^{2}q}$C£®$\frac{2mB}{{E}^{2}q}$D£®$\frac{2mE}{{B}^{2}q}$

·ÖÎö ¸ù¾Ý¶¯Äܶ¨ÀíqEH=$\frac{1}{2}$mv2£¬qE=qvB£¬ÍƵ¼³öHµÄ±í´ïʽ£¬Í¨¹ýµ¥Î»ÖÆÏàͬ£¬È·¶¨×îÖյıí´ïʽ£®

½â´ð ½â£º½áºÏ³£Óù«Ê½£º¶¯Äܶ¨ÀíÓÐ qEH=$\frac{1}{2}$mv2£¬qE=qvB£¬ÔòH=$\frac{mE}{2{B}^{2}q}$£®
´Ë½á¹û²»ÊÇÒªÇóµÄÖµ£¬µ«¸ù¾ÝÎïÀíµ¥Î»ÖÆ¿ÉÖª£¬HµÄµ¥Î»Ò»¶¨¸ú$\frac{mE}{{B}^{2}q}$Ïàͬ£®¹ÊBÕýÈ·£¬A¡¢C¡¢D´íÎó£®
¹ÊÑ¡£ºB£®

µãÆÀ ±¾Ì⿼²éµ¥Î»ÖƵÄÔËÓã¬Í¨¹ýÒÑѧµÄ¹«Ê½µÃ³öHµÄµ¥Î»ÖÆ»áÓëʲôÁ¿Ïàͬ£¬´Ó¶øÈ·¶¨HµÄ±í´ïʽ£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿

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

¾«Ó¢¼Ò½ÌÍø