Question

9£®Ä³Í¬Ñ§ÀûÓÃÈçͼ¼×ËùʾµÄµç·²âÁ¿µçÔ´µÄµç¶¯ÊƺÍÄÚ×裬ËùÓõÄʵÑéÆ÷²ÄÓУºÒ»¸öµçѹ±íV¡¢Ò»¸öµç×èÏäR¡¢Ò»¸ö5.0¦¸µÄ¶¨Öµµç×èR₀£¬Ò»¸ö¿ª¹ØºÍµ¼ÏßÈô¸É£º
£¨1£©¸ù¾Ýµç·ͼ£¬Óñʻ­´úÌæµ¼Ïߣ¬½«ÊµÎïͼÁ¬³ÉÍêÕûµç·£»
£¨2£©¸ÃͬѧΪÁËÓÃ×÷ͼ·¨À´È·¶¨µçÔ´µÄµç¶¯ÊƺÍÄÚ×裬ÒÔ$\frac{1}{U}$Ϊ×Ý×ø±ê¡¢$\frac{1}{R}$Ϊºá×ø±ê×ö³öµÄͼÏóÈçͼ±ûËùʾ£¬Ôò¸ÃͼÏóµÄº¯Êý±í´ïʽΪ£º$\frac{1}{U}$=$\frac{R+r+R_{0}}{ER}$=$\frac{R_{0}+r}{ER}$+$\frac{1}{E}$£¨Óú¬ÓÐU¡¢R¡¢R₀¡¢E¡¢rµÄº¯Êý±í´ïʽ±íʾ£©
£¨3£©ÓÉͼÏó¿ÉÇóµÃ£¬¸ÃµçÔ´µÄµç¶¯ÊÆE=2.9V£¬ÄÚ×èr=2.5¦¸£¨½á¹û¾ù±£ÁôÁ½Î»ÓÐЧÊý×Ö£©

Answer 1

·ÖÎö £¨1£©¸ù¾ÝÔ­Àíͼ¿ÉµÃ³ö¶ÔÓ¦µÄʵÎïͼ£»
£¨2£©±¾Ìâ²ÉÓ÷ü×è·¨²âµçÔ´µÄµç¶¯ÊƺÍÄÚ×裬Óɱպϵç·ŷķ¶¨Âɿɵóö±í´ïʽ£¬Ôò¿ÉµÃ³öͼÏóÖн»µãµÄÒâÒ壻
£¨3£©¸ù¾ÝͼÏóºÍ±í´ïʽ£¬ÓÉͼÏóÓë×Ý×ø±êµÄ½»µã¿ÉÇóµÃµçÔ´µÄµç¶¯ÊÆ£»ÓÉͼÏóµÄбÂÊ¿ÉÇóµÃÄÚµç×裮

½â´ð ½â£º£¨1£©¸ù¾ÝÔ­Àíͼ¿ÉµÃ³öÕýÈ·µÄʵÎïͼÈçͼËùʾ£»
£¨2£©Óɱպϵç·ŷķ¶¨ÂÉ¿ÉÖª£º
U=$\frac{E}{R+R_{0}+r}$R
±äÐοɵãº$\frac{1}{U}$=$\frac{R+r+R_{0}}{ER}$=$\frac{R_{0}+r}{ER}$+$\frac{1}{E}$
¹Ê±í´ïʽΪ£º$\frac{1}{U}$=$\frac{R_{0}+r}{ER}$+$\frac{1}{E}$
ÓÉÊýѧ֪ʶ¿ÉÖª£¬Í¼ÏóÓë×Ý×ø±êµÄ½»µãΪµçÔ´µç¶¯ÊƵĵ¹Êý£»
£¨2£©ÓÉͼ¿ÉÖª£¬Í¼ÏóÓë×Ý×ø±êµÄ½»µãΪ£º0.35=$\frac{1}{E}$£»
½âµÃ£ºE=2.9V£»
ͼÏóµÄбÂÊΪ£ºk=$\frac{2.95-0.35}{1.0}$=2.6
$\frac{R_{0}+r}{E}$=2.6
½âµÃ£ºr=2.5¦¸
¹Ê´ð°¸Îª£º£¨1£©ÈçͼËùʾ£»£¨2£©$\frac{1}{U}$=$\frac{R_{0}+r}{ER}$+$\frac{1}{E}$£»£¨3£©2.9£»2.5£®

µãÆÀ ±¾Ì⿼²éʹÓ÷ü×è·¨²â¶¨µç¶¯ÊƺÍÄÚµç×èµÄʵÑ飬עÒâ¸ù¾Ý±ÕºÏµç·ŷķ¶¨ÂÉÇóµÃ±í´ïʽ£¬ÔÙ½áºÏͼÏóµÄÒâÒå¼´¿ÉµÃ³öµç¶¯ÊƺÍÄÚµç×裻ÐèÒªÎÒÃÇÔÚ±í´ïʽµÄ±äÐιý³ÌÖÐ×¢ÒâÊýѧ֪ʶµÄÓ¦Óã®