14£®Òª²âÒ»´ý²âµçÔ´µÄµç¶¯ÊƼ°ÄÚ×裮Ëù¸øµÄʵÑéÆ÷²ÄÓУº´ý²âµçÔ´E£¬¶¨Öµµç×èR1£¨×èֵδ֪£©£¬µçѹ±íV£¨Á¿³ÌΪ3.0V£¬ÄÚ×èºÜ´ó£©£¬µç×èÏäR£¨0¡«99.99¦¸£©£¬µ¥µ¶µ¥ÖÀ¿ª¹ØS1£¬µ¥µ¶Ë«ÖÀ¿ª¹ØS2£¬µ¼ÏßÈô¸É£®
£¨1£©Ä³Í¬Ñ§Á¬½ÓÁËÈçͼ1ËùʾµÄµç·£¬½ÓÏÂÀ´µÄ²Ù×÷ÊÇ£º
¢Ù½«S2½Óµ½a£¬±ÕºÏS1£¬²¦¶¯µç×èÏäÐýÅ¥£¬Ê¹¸÷ÐýÅ¥Å̵Ŀ̶ȴ¦ÓÚÈçͼ2ËùʾµÄλÖ㬼Ǽ϶ÔÓ¦µÄµçѹ±íʾÊýΪ2.20V£¬È»ºó¶Ï¿ªS1£»
¢Ú±£³Öµç×èÏäʾÊý²»±ä£¬½«S2Çл»µ½b£¬±ÕºÏS1£¬¼Ç¼´Ëʱµçѹ±íµÄ¶ÁÊý£¨µçѹ±íµÄʾÊýÈçͼ3Ëùʾ£©£¬È»ºó¶Ï¿ªS1£®

ÇëÄã½â´ðÏÂÁÐÎÊÌ⣺ͼ2Ëùʾµç×èÏäµÄ¶ÁÊýΪ20.0¦¸£¬Í¼3ËùʾµÄµçѹ±í¶ÁÊýΪ2.80 V£®ÓÉ´Ë¿ÉËã³ö¶¨Öµµç×èR1µÄ×èֵΪ5.45¦¸ £¨¼ÆËã½á¹û±£ÁôÁ½Î»Ð¡Êý£©£®
ÔÚÉÏÃæµÚ¢Ù²½µÄ²Ù×÷ÖУ¬ÓÐÒ»´¦²»Ç¡µ±£¬ÇëÄú°ïͬѧָ³öÀ´µ÷½Úµç×èÏäʱ£¬ÐèÇжϵçÔ´£®
£¨2£©ÔÚÍê³ÉÉÏÊö²Ù×÷ºó£¬Í¬Ñ§¼ÌÐøÒÔϵIJÙ×÷£º
½«S2Çл»µ½a£¬¶à´Îµ÷½Úµç×èÏ䣬±ÕºÏS1£¬¶Á³ö¶à×éµç×èÏäµÄʾÊýRºÍ¶ÔÓ¦µÄµçѹ±íʾÊýU£¬ÓɲâµÃµÄÊý¾Ý£¬»æ³öÁËÈçͼ4ËùʾµÄ$\frac{1}{U}$-$\frac{1}{R}$ͼÏߣ®ÓÉ´Ë¿ÉÇóµÃµçÔ´µç¶¯ÊÆEºÍµçÔ´ÄÚ×èr£¬ÆäÖÐE=2.90V£»r=0.35¦¸£¨¼ÆËã½á¹û¾ù±£ÁôÁ½Î»Ð¡Êý£©£®

·ÖÎö £¨1£©µç×èÏä¸÷ÐýťʾÊýÓë¶ÔÓ¦±¶Âʵij˻ýÖ®ºÍÊǵç×èÏäµÄʾÊý£»ÓÉͼʾµçѹ±íÈ·¶¨µÄÆäÁ¿³ÌÓë·Ö¶ÈÖµ£¬¶Á³öÆäʾÊý£»ÓÉ´®Áªµç·ÌصãÓëÅ·Ä·¶¨ÂÉÇó³öµç×è×èÖµ£®
£¨2£©Ó¦ÓÃÅ·Ä·¶¨ÂÉÇó³öͼÏóµÄº¯Êý±í´ïʽ£¬È»ºó¸ù¾ÝͼÏóÓ뺯Êý±í´ïʽÇó³öµçÔ´µç¶¯ÊÆÓëÄÚ×裮

½â´ð ½â£º£¨1£©µç×èÏäµÄ×èÖµµÈÓÚ2¡Á10=20.0¦¸£®Í¼3µçѹ±íµÄʾÊýΪ2.80V£¬
¸ù¾Ý±ÕºÏµç·ŷķ¶¨Âɵã¬R1=$\frac{2.80-2.20}{\frac{2.20}{20}}$=5.45¦¸£®µ÷½Úµç×èÏäʱ£¬ÐèÇжϵçÔ´£®
£¨2£©Ôڱպϵç·ÖУ¬µçÔ´µç¶¯ÊÆ£ºE=U+I£¨r+R1£©=U+$\frac{U}{R}$£¨r+R1£©£¬$\frac{1}{U}$=$\frac{1}{E}$+$\frac{r+{R}_{1}}{E}$•$\frac{1}{R}$£¬
ÓÉͼ±ûËùʾͼÏó¿ÉÖª£¬b=$\frac{1}{E}$=0.35£¬E¡Ö2.90V£¬Í¼ÏóбÂÊk=$\frac{r+{R}_{1}}{E}$=$\frac{0.55-0.35}{0.10}$=2.0£¬
µçÔ´ÄÚ×èr=kE-R1=2¡Á2.9-5.45=0.35¦¸£®
¹Ê´ð°¸Îª£º£¨1£©20.0£¬2.80£¬5.45£¬µ÷½Úµç×èÏäʱ£¬ÐèÇжϵçÔ´£»£¨2£©2.90£¬0.35

µãÆÀ µç×èÏä¸÷ÐýťʾÊýÓë¶ÔÓ¦±¶Âʵij˻ýÖ®ºÍÊǵç×èÏäµÄʾÊý£»¶Ôµç±í¶ÁÊýʱ£¬ÒªÏÈÈ·¶¨ÆäÁ¿³ÌÓë·Ö¶ÈÖµ£¬È»ºóÔÙ¶ÁÊý£¬¶ÁÊýʱÊÓÏßÒªÓëµç±í¿Ì¶ÈÏß´¹Ö±£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

17£®ÈçͼËùʾÊǵç´Å´òµã¼ÆʱÆ÷´ò³öµÄÒ»Ìõ¼Ç¼С³µÔ˶¯µÄÖ½´ø£®È¡¼ÆÊýµãA¡¢B¡¢C¡¢D¡¢E¡¢F¡¢G£®Ã¿ÏàÁÚÁ½¸ö¼ÆÊýµã¼ä»¹ÓÐ4¸ö´òÓ¡µã£¨Í¼ÖÐδ»­³ö£©£¬Óÿ̶ȳ߲âÁ¿³ö¸÷ÏàÁÚ¼ÆÊýµã¼äµÄ¾àÀë·Ö±ðΪAB=1.40cm£¬BC=3.80cm£¬CD=6.20cm£¬DE=8.60cm£¬EF=11.00cm£¬FG=13.40cm£¬ÔòС³µÔ˶¯µÄ¼ÓËٶȴóСa=2.40m/s2£¬´òÖ½´øÉÏCµãʱС³µµÄ˲ʱËٶȴóСvC=0.50m/s£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

5£®ÈƵØÇò×öÔÈËÙÔ²ÖÜÔ˶¯µÄÈËÔìµØÇòÎÀÐÇ£¬Æä¹ìµÀ°ë¾¶Ô½´ó£¬ÔòËüÔËÐеģ¨¡¡¡¡£©
A£®ËÙ¶ÈԽС£¬ÖÜÆÚԽСB£®ËÙ¶ÈԽС£¬ÖÜÆÚÔ½´ó
C£®ËÙ¶ÈÔ½´ó£¬ÖÜÆÚԽСD£®ËÙ¶ÈÔ½´ó£¬ÖÜÆÚÔ½´ó

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

2£®ÈçͼËùʾ£¬ÐéÏßa¡¢b¡¢c´ú±í¾²µç³¡ÖеÄÈý¸öµÈÊÆÃ棬ËüÃǵĵçÊÆ·Ö±ðΪϕa¡¢ϕbºÍϕc£¬ϕa£¾ϕb£¾ϕcÒ»´øÕýµçµÄÁ£×ÓÉäÈëµç³¡ÖУ¬²»¼ÆÖØÁ¦×÷Óã¬ÆäÔ˶¯¹ì¼£ÈçͼÖÐʵÏßKLMNËùʾ£®ÔòÏÂÁÐ˵·¨´íÎóµÄÊÇ£¨¡¡¡¡£©
A£®Á£×Ó´ÓKµ½LµÄ¹ý³ÌÖУ¬µç³¡Á¦×ö¸º¹¦
B£®Á£×Ó´ÓLµ½MµÄ¹ý³ÌÖУ¬µç³¡Á¦×ö¸º¹¦
C£®Á£×Ó´ÓKµ½LµÄ¹ý³ÌÖУ¬µçÊÆÄÜÔö¼Ó
D£®Á£×Ó´ÓMµ½NµÄ¹ý³ÌÖУ¬¶¯ÄÜÔö¼Ó

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

9£®µçÔ´µÄЧÂʦǶ¨ÒåΪÍâµç·µç×èÏûºÄµÄ¹¦ÂÊÓëµçÔ´µÄ×ܹ¦ÂÊÖ®±È£®Èçͼ£¬Ö±ÏßA¡¢BºÍC·Ö±ðÊǵçÔ´a¡¢µçÔ´bºÍµç×èRµÄ·ü°²ÌØÐÔͼÏߣ®½«Õâ¸öµç×èR·Ö±ð½Óµ½a¡¢bÁ½µçÔ´ÉÏ£¬ÄÇô£¨¡¡¡¡£©
A£®R½Óµ½µçÔ´aÉÏ£¬µçÔ´µÄЧÂʽϵÍ
B£®R½Óµ½µçÔ´bÉÏ£¬µçÔ´µÄÊä³ö¹¦Âʽϴó
C£®R½Óµ½µçÔ´aÉÏ£¬µçÔ´µÄÊä³ö¹¦Âʽϴ󣬵çԴЧÂʽϸß
D£®R½Óµ½µçÔ´bÉÏ£¬µçÔ´µÄÊä³ö¹¦ÂʽÏС£¬µçԴЧÂʽϸß

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

19£®¹ØÓÚÖʵ㣬ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®ÖʵãÒ»¶¨ÊÇÌå»ýºÍÖÊÁ¿¼«Ð¡µÄÎïÌå
B£®ÒòΪÖʵãûÓдóС£¬ËùÒÔÓ뼸ºÎÖеĵãûÓÐÇø±ð
C£®Ñо¿Ô˶¯Ô±ÔÚ3 000Ã׳¤ÅܱÈÈüÖÐÔ˶¯µÄ¿ìÂýʱ£¬¸ÃÔ˶¯Ô±¿É¿´³ÉÖʵã
D£®ÐÀÉÍ°ÅÀÙÎè±íÑÝÕߵľ«²Ê±íÑÝʱ£¬¿ÉÒÔ°Ñ°ÅÀÙÎè±íÑÝÕß¿´³ÉÖʵã

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

6£®ÈçͼËùʾ£¬ÔÚÓëˮƽ·½Ïò³É60¡ã½ÇµÄ¹â»¬½ðÊôµ¼¹ì¼äÁ¬Ò»µçÔ´£¬ÔÚÏà¾à1mµÄƽÐе¼¹ìÉÏ·ÅÒ»ÖØÁ¦Îª3NµÄ½ðÊô°ôab£¬°ôÉÏͨ¹ý3AµÄµçÁ÷£¬´Å³¡·½ÏòÊúÖ±ÏòÉÏ£¬Õâʱ½ðÊô°ôÇ¡ºÃ¾²Ö¹£¬Çó£º
£¨1£©ÔÈÇ¿´Å³¡µÄ´Å¸ÐӦǿ¶ÈΪ¶à´ó£¿
£¨2£©µ¼¹ì¶Ôab°ôµÄÖ§³ÖÁ¦Îª¶à´ó£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º¶àÑ¡Ìâ

3£®ÈçͼËùʾ£¬ÓÐÒ»Äڱڹ⻬µÄ±ÕºÏÍÖÔ²ÐιܵÀ£¬ÖÃÓÚÊúֱƽÃæÄÚ£¬MNÊÇͨ¹ýÍÖÔ²ÖÐÐÄOµãµÄˮƽÏߣ®ÒÑ֪һСÇò´ÓMµã³ö·¢£¬³õËÙÂÊΪv0£¬ÑعܵÀMPNÔ˶¯£¬µ½NµãµÄËÙÂÊΪv1£¬ËùÐèʱ¼äΪt1£»Èô¸ÃСÇòÈÔÓÉMµãÒÔ³õËÙÂÊv0³ö·¢£¬¶øÑعܵÀMQNÔ˶¯£¬µ½NµãµÄËÙÂÊΪv2£¬ËùÐèʱ¼äΪt2£®Ôò£¨¡¡¡¡£©
A£®v1=v2B£®v1£¼v2C£®t1£¼t2D£®t2£¼t1

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

4£®µç´Å´òµã¼ÆʱÆ÷ÊDzâÁ¿Ê±¼äµÄÒÇÆ÷£¬µçԴƵÂÊÊÇ50Hz£¬Ëüÿ¸ô0.02 s´òÒ»´Îµã£¬ÔڲⶨÔȱäËÙÖ±ÏßÔ˶¯¼ÓËÙ¶ÈʵÑéÖУ¬Ä³´ÎʵÑéÖ½´øµÄ¼Ç¼ÈçͼËùʾ£¬Ö½´øÉÏO¡¢A¡¢B¡¢C¡¢D¡¢E¡¢F¡¢GΪ¼ÆÊýµã£¬Ã¿ÏàÁÚÁ½¸ö¼ÆÊýµã¼ä»¹ÓÐ4¸öµãûÓл­³ö£¬ÓÉͼ¿ÉÖªÖ½´øµÄ¼ÓËٶȵÈÓÚ0.75m/s2£¬ÔÚ´òDµãʱֽ´øµÄËÙ¶ÈΪ0.40m/s±£ÁôÁ½Î»ÓÐЧÊý×Ö£©£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸