ÌâÄ¿ÄÚÈÝ
15£®Ä³Ñо¿ËùΪÁËÈ·¶¨²»Í¬ÒòËضÔÎÙË¿°×³ãµÆÅÝƽ¾ùʹÓÃÊÙÃüµÄÓ°Ï죬×öÁËÈçÏÂÈý¸öʵÑ飮¢ÙʹµÆÅÝÄÚÆøÌåѹǿΪ0.1atm£¬½«µÆÅÝÄÚ²»Í¬Ö±¾¶£¨D£©¡¢Ïàͬ³¤¶ÈµÄÎÙ˿ͨµç¼ÓÈȵ½2400K£¬²â³öά³ÖÕâһζÈËùÐèµÄµçÁ÷£¨I£©ÒÔ¼°µÆË¿µÄƽ¾ùʹÓÃÊÙÃü£¨t£©Èç±íËùʾ£®
D£¨¦Ìm£© | I£¨A£© | t£¨h£© |
25 | 0.05 | 800 |
50 | 0.20 | 1600 |
100 | 0.80 | 3200 |
250 | 5.00 | 8000 |
T£¨K£© | I£¨A£© | t£¨h£© |
2400 | 5.00 | 8000 |
2600 | 6.61 | 377 |
2800 | 7.48 | 29.5 |
3000 | 8.38 | 3.4 |
£¨1£©£¨µ¥Ñ¡£©¸ù¾ÝʵÑé¢ÛµÄ½á¹û£¬ÔÚÓëʵÑé3ÏàͬµÄʵÑéÌõ¼þÏ£¬¿ÉÒÔÔ¤²âÎÙË¿¹¤×÷ζÈÔÚ2300Kʱ£¬Æäƽ¾ùʹÓÃÊÙÃü×î½Ó½üÓÚD
£¨A£©50h£¨B£©500h£¨C£©2400h£¨D£©24000h
£¨2£©£¨µ¥Ñ¡£©ÔÚÏàͬµÄζÈÏ£¬ÏÂÁÐËÄÖÖµÆÅÝÖеÆ˿ƽ¾ùʹÓÃÊÙÃü×µÄÊÇD
£¨A£©50¦Ìm´ÖϸµÄµÆË¿²¢³äÓÐ2.5atmµÄ¶èÐÔÆøÌå
£¨B£©100¦Ìm´ÖϸµÄµÆË¿²¢³äÓÐ0.5atmµÄ¶èÐÔÆøÌå
£¨C£©150¦Ìm´ÖϸµÄµÆË¿²¢³äÓÐ0.1atmµÄ¶èÐÔÆøÌå
£¨D£©150¦Ìm´ÖϸµÄµÆË¿²¢³äÓÐ0.5atmµÄ¶èÐÔÆøÌå
£¨3£©ÊµÑé¢ÙÖУ¬ÈôµÆË¿´ÖϸΪ75¦Ìm£¬ÇÒµÆË¿µÄ·¢Èȵç×èΪ500¦¸£¬Òª±£Ö¤¸ÃµÆÅݵÄƽ¾ùʹÓÃÊÙÃüΪ2400h£¬Ôò¼ÓÔڸõÆÅÝÁ½¶ËµÄµçѹ²»Äܳ¬¹ý225V£®
·ÖÎö £¨1£©Óɱí¸ñ2·ÖÎöʹÓÃʱ¼äÓëζȵĹØϵ£¬´Ó¶øÍƲâζÈΪ2300KʱµÄʹÓÃʱ¼ä£»
£¨2£©×ÛºÏÈý¸öʵÑé½áÂۿɵóöÓ°ÏìÊÙÃüµÄ¹Ø¼üÒòËØ£¬´Ó¶øÈ·¶¨Ê¹ÓÃʱ¼ä×µÄµÆË¿£»
£¨3£©ÓɵÚÒ»¸ö±í¸ñ·ÖÎöµçÁ÷ÓëµÆË¿´Öϸ¹Øϵ£¬Æ½¾ùÊÙÃüÓë´Öϸ¹Øϵ£¬´Ó¶øÇó³öά³Ö2400kʱÐèÒªµÄµçÁ÷´óС£¬ÔÙÓÉÅ·Ä·¶¨ÂÉÇó½âµçѹֵ£®
½â´ð ½â£º£¨1£©Óɱí¸ñÊý¾Ý¿ÉÖª£¬µ±Î¶ȽµµÍʱ£¬Ê¹ÓÃÊÙÃü±ä³¤£¬¹Ê¿ÉÖª£¬µ±Î¶ȽµÎª2300KʹÓÃÊÙÃüÒ»¶¨´óÓÚ8000h£¬Òò´ËÖ»ÄÜΪ24000h£¬¹ÊÑ¡D£»
£¨2£©Óɱí¸ñ¿ÉÖª£¬Ö±¾¶Ô½´ÖʹÓÃÊÙÃüÔ½³¤£¬ÏàͬÌõ¼þÏ£¬Ñ¹Ç¿ÔÚ0.5atmʱʹÓÃÊÙÃü×£¬¹ÊʹÓÃʱ¼ä×µÄӦΪD£»
£¨3£©Óɱí¸ñÊý¾Ý·ÖÎö¿ÉÖª£º¢ÙµçÁ÷ÓëµÆË¿´Öϸ¹Øϵ£º£¨$\frac{d}{25}$£©2¡Á0.05A£»¢Úƽ¾ùʹÓÃÊÙÃüÓëµÆË¿´ÖϸµÄ¹Øϵ£º$\frac{d}{25}$¡Á800h£®
ËùÒÔµÆË¿´ÖϸΪ75¦Ìmʱ£¬Ôòά³Ö2400KºãÎÂËùÐèµÄµçÁ÷Ϊ£º£¨$\frac{75}{25}$£©2¡Á0.05A=0.45A£¬
¸ù¾ÝÅ·Ä·¶¨ÂÉÓÐU=IR=0.45¡Á500V=225V£®
¹Ê´ð°¸Îª£º£¨1£©D£»£¨2£©D£»£¨3£©225£®
µãÆÀ ±¾Ì⿼²éµÆÅÝÊÙÃüµÄ·ÖÎöʵÑ飬ҪעÒâÃ÷È·ÌâÒâºÍÕýÈ·ÀûÓÃÊýѧ¹æÂÉ·ÖÎö¹éÄÉÊǽâÌâµÄ¹Ø¼ü£¬ËùÒÔ±¾ÌâʵÑ鿼²éµÄÊÇѧÉú·ÖÎöÎÊÌâµÄÄÜÁ¦£®
A£® | ¼ÓËٶȵĴóС֮±ÈΪ2£º1 | B£® | λÒƵĴóС֮±ÈΪ1£º2 | ||
C£® | ƽ¾ùËٶȵĴóС֮±ÈΪ1£º2 | D£® | Öмäʱ¿ÌËٶȵĴóС֮±ÈΪ1£º2 |
A£® | ÖØÁ¦¶ÔÎïÌå×ö¹¦Îªmg£¨H+h£© | B£® | ÖØÁ¦¶ÔÎïÌå×ö¹¦ÎªmgH | ||
C£® | ÍâÁ¦¶ÔÎïÌå×öµÄ×ܹ¦²»ÎªÁã | D£® | µØÃæ¶ÔÎïÌåµÄƽ¾ù×èÁ¦Îª$\frac{mg£¨H+h£©}{h}$ |
A£® | Îï¿éËùÊÜÖ§³ÖÁ¦Óë¸ÖË÷ÀÁ¦Ö®±ÈΪm£ºM | |
B£® | µØ°å¶ÔÎï¿éµÄÖ§³ÖÁ¦×öµÄ¹¦µÈÓÚ$\frac{1}{2}$mv2+mgH | |
C£® | Îï¿é¿Ë·þÖØÁ¦×ö¹¦µÄƽ¾ù¹¦ÂʵÈÓÚ$\frac{1}{2}$mgv | |
D£® | µçÌݼ°Îï¿é¹¹³ÉµÄϵͳ»úеÄÜÔö¼ÓÁ¿µÈÓÚ$\frac{1}{2}$£¨M+m£©v2 |
ÔÚÒÔÏÂËÄÖÖ˵·¨ÖУ¬ÓëÑÇÀïÊ¿¶àµÂ¹ÛµãÏà·´µÄÊÇ£¨¡¡¡¡£©
A£® | ËÄÆ¥ÂíÀµÄ³µ±ÈÁ½Æ¥ÂíÀµÄ³µÅܵÿ죻Õâ˵Ã÷£¬ÎïÌåÊܵÄÁ¦Ô½´ó£¬ËٶȾÍÔ½´ó | |
B£® | Ò»¸öÔ˶¯µÄÎïÌ壬Èç¹û²»ÔÙÊÜÁ¦ÁË£¬Ëü×Ü»áÖð½¥Í£ÏÂÀ´£»Õâ˵Ã÷£¬¾²Ö¹×´Ì¬²ÅÊÇÎïÌ峤ʱ¼ä²»ÊÜÁ¦Ê±µÄ¡°×ÔȻ״̬¡± | |
C£® | Á½ÎïÌå´Óͬһ¸ß¶È×ÔÓÉÏÂÂ䣬½ÏÖصÄÎïÌåÏÂÂäµÃ½Ï¿ì | |
D£® | Ò»¸öÎïÌåά³ÖÔÈËÙÖ±ÏßÔ˶¯²»ÐèÒªÁ¦ |
A£® | µÈÁ¿Í¬ÖÖµçºÉ | B£® | ²»µÈÁ¿Í¬ÖÖµçºÉ | C£® | µÈÁ¿ÒìÖÖµçºÉ | D£® | ²»µÈÁ¿ÒìÖÖµçºÉ |