ÌâÄ¿ÄÚÈÝ
14£®¸ß㬵¼ÏÞÁ÷Æ÷±»¹«ÈÏΪĿǰ×îºÃµÄÇÒΩһÐÐÖ®ÓÐЧµÄ¶Ì·¹ÊÕϵçÁ÷ÏÞÖÆ×°Öã¬Öйú¿ÆѧԺµç¹¤Ñо¿ËùÍê³ÉÁËÒ»ÖÖ¾ßÓÐ×ÔÖ÷֪ʶ²úȨµÄ¸ßγ¬ÏÞÁ÷Æ÷Ñù»úµÄÑÐÖƹ¤×÷£¬²¢ÓÚ2005Äê³õÔÚºþÄϽøÐв¢Íø¹Ò»úʵÑ飮³¬µ¼ÏÞÁ÷Æ÷Óɳ¬µ¼²¿¼þºÍÏÞÁ÷µç×è²¢Áª×é³É£¬ÈçͼËùʾ£®³¬µ¼²¿¼þÓÐÒ»¸ö³¬µ¼ÁÙ½çµçÁ÷IC£¬µ±Í¨¹ýÏÞÁ÷Æ÷µÄµçÁ÷I£¾ICʱ£¬½«Ôì³É³¬µ¼Ìåʧ³¬£¬´Ó³¬µ¼Ì¬£¨±¾ÌâÈÏΪµç×èΪÁ㣩ת±äΪÕý³£Ì¬£¨±¾ÌâÈÏΪÊÇÒ»¸ö´¿µç×裩£®ÒÔ´ËÀ´ÏÞÖƵçÁ¦ÏµÍ³µÄ¹ÊÕϵçÁ÷£®ÒÑÖª³¬µ¼²¿¼þµÄÕý³£µç×èΪR1=3¦¸£¬³¬µ¼ÁÙ½çµçÁ÷IC=1.2A£¬ÏÞÁ÷µç×èR2=6¦¸£¬Ð¡µÆÅÝLÉϱêÓС°6V 6W¡±£¬µçÔ´µç¶¯Ô´E=8V£¬ÄÚ×èr=2¦¸£®ÔÀ´µç·Õý³£¹¤×÷£¬ÏÖLͻȻ·¢Éú¶Ì·£®Ôò£¨¡¡¡¡£©¢Ù¶Ì·ǰͨ¹ýR1µÄµçÁ÷Ϊ$\frac{2}{3}$A
¢Ú³¬µ¼²¿¼þ½«Óɳ¬µ¼Ì¬×ªÎªÕý³£Ì¬
¢Û¶Ì·ºóͨ¹ýR1µÄµçÁ÷Ϊ2A
¢Ü¶Ì·ºóͨ¹ýR1µÄµçÁ÷Ϊ$\frac{4}{3}$A£®
A£® | ¢Ù¢Ú | B£® | ¢Ú¢Û | C£® | ¢Ú¢Ü | D£® | ¢Ù¢Û |
·ÖÎö µç·Õý³£¹¤×÷ʱ£¬³¬µ¼²¿¼þ´¦ÓÚ³¬µ¼Ì¬£¬µç×èΪÁ㣬¸ù¾ÝÅ·Ä·¶¨ÂÉÇó³öͨ¹ýR1µÄµçÁ÷£®L·¢Éú¶Ì·ºó£¬³¬µ¼²¿¼þתΪÕý³£Ì¬£¬ÓëÏÞÁ÷µç×è²¢Áª£¬ÓÉÅ·Ä·¶¨Âɺʹ®²¢Áªµç·µÄÌصãÇó³öͨ¹ýR1µÄµçÁ÷£®
½â´ð ½â£º¢Ù¡¢¶Ì·ǰ£¬µÆÅÝÓ볬µ¼µç×è´®Áª½ÓÈëµç·£¬ÒòµÆÅÝÕý³£·¢¹â£¬Ôòµç·ÖеçÁ÷Ϊ${I}_{L}^{\;}=\frac{P}{U}=\frac{6}{6}A=1A$£¬¹Ê¢Ù´íÎó£»
¢Ú¡¢¶Ì·ºó£¬Ö»ÓÐ${R}_{2}^{\;}$½ÓÈëµç·£¬ÔòµçÁ÷Ϊ£º$I=\frac{E}{{R}_{2}^{\;}+r}=\frac{8}{2+3}A=1.6A£¾1.2A$£¬³¬¹ýÁÙ½çµçÁ÷£¬¹Ê³¬µ¼Ìåʧ³¬£¬×ª»¯ÎªÕý³£Ì¬£¬¹Ê¢ÚÕýÈ·£»
¢Û¢Ü¡¢µÆÅݶÌ·ºóÁ½¸öµç×è²¢Áª£¬µç·Öеĵç×èΪ$R¡ä=\frac{{R}_{1}^{\;}{R}_{2}^{\;}}{{R}_{1}^{\;}+{R}_{2}^{\;}}=\frac{3¡Á6}{3+6}¦¸=2¦¸$£¬Â·¶Ëµçѹ$U=\frac{E}{R¡ä+r}•R¡ä=\frac{8}{2+2}¡Á2=4V$£¬Í¨¹ý${R}_{1}^{\;}$µÄµçÁ÷ΪI${I}_{1}^{\;}=\frac{U}{{R}_{1}^{\;}}=\frac{4}{3}A$£¬¹Ê¢Û´íÎ󣬢ÜÕýÈ·£»
¹ÊÑ¡£ºC
µãÆÀ ±¾ÌâÎÄ×ֽϳ¤£¬ÒªÅàÑø¿ìËÙÔĶÁºÍ¿ìËÙÌáÈ¡ÐÅÏ¢µÄÄÜÁ¦£®´ËÌâ¹Ø¼üץס¸ß㬵¼ÏÞÁ÷Æ÷µÄÏÞÁ÷¹¦ÄܽøÐзÖÎö£®
A£® | ¼×¹âµÄƵÂÊ´óÓÚÒÒ¹âµÄƵÂÊ | |
B£® | ÒÒ¹âµÄ²¨³¤´óÓÚ±û¹âµÄ²¨³¤ | |
C£® | ÒÒ¹â¶ÔÓ¦µÄ½ØֹƵÂÊСÓÚ±û¹âµÄ½ØֹƵÂÊ | |
D£® | ¼×¹â¶ÔÓ¦µÄ¹âµç×Ó×î´ó³õ¶¯ÄÜСÓÚ±û¹âµÄ¹âµç×Ó×î´ó³õ¶¯ÄÜ | |
E£® | ¼×¹âµÄƵÂʵÈÓÚÒÒ¹âµÄƵÂÊ£® |
A£® | µ±t=$\frac{1}{2}$sʱ£¬PµãÔÚ²¨·å | B£® | µ±t=$\frac{11}{3}$sʱ£¬PµãÔÚ²¨·å | ||
C£® | µ±t=$\frac{1}{2}$sʱ£¬QµãÔÚ²¨·å | D£® | µ±t=$\frac{3}{2}$sʱ£¬QµãÔÚ²¨¹È |
A£® | µç×èÁ½¶ËµÄµçѹΪIR | B£® | µçÔ´Á½¶ËµÄµçѹΪIR | ||
C£® | ͨ¹ýСµÆÅݵĵçÁ÷ΪI=$\frac{E}{R+r+{R}_{L}}$ | D£® | СµÆÅݵĵ繦ÂÊΪEI |
A£® | ÏßȦÖдÅͨÁ¿±ä»¯Ô½´ó£¬²úÉúµÄ¸ÐÓ¦µç¶¯ÊÆÒ»¶¨Ô½´ó | |
B£® | ÏßȦÖдÅͨÁ¿±ä»¯Ô½¿ì£¬²úÉúµÄµç¶¯ÊÆÒ»¶¨Ô½´ó | |
C£® | ÏßȦ·ÅÔڴų¡Ô½Ç¿µÄλÖ㬲úÉúµÄ¸ÐÓ¦µç¶¯ÊÆÒ»¶¨Ô½´ó | |
D£® | ÏßȦÖдÅͨÁ¿Ô½´ó£¬²úÉúµÄ¸ÐÓ¦µç¶¯ÊÆÒ»¶¨Ô½´ó |
A£® | ͨµçÖ±µ¼ÏßÔÚij´¦ËùÊÜ°²ÅàÁ¦µÄ·½Ïò¸ú¸Ã´¦µÄ´Å³¡·½ÏòÏàͬ | |
B£® | ͨµçÖ±µ¼ÏßÔÚij´¦²»ÊÜ°²ÅàÁ¦µÄ×÷Óã¬Ôò¸Ã´¦Ã»Óдų¡ | |
C£® | ͨµçÖ±µ¼ÏßËùÊÜ°²ÅàÁ¦µÄ·½Ïò¿ÉÒÔ¸úµ¼Ïß´¹Ö±£¬Ò²¿ÉÒÔ²»´¹Ö± | |
D£® | ͨµçÖ±µ¼Ï߸ú´Å³¡´¹Ö±Ê±Êܵ½µÄ°²ÅàÁ¦Ò»¶¨×î´ó |
A£® | $\frac{{v}_{1}+{v}_{2}}{2}$ | B£® | $\frac{{v}_{1}{v}_{2}}{{v}_{1}+{v}_{2}}$ | C£® | $\frac{{2v}_{1}{v}_{2}}{{v}_{1}+{v}_{2}}$ | D£® | ÎÞ·¨È·¶¨ |
A£® | ¼×¡¢ÒÒÁ½ÎïÌåλÒÆ·Ö±ðΪx¼×=3 m£¬xÒÒ=-5 m£¬Ôòx¼×£¾xÒÒ | |
B£® | ¼×¡¢ÒÒÁ½ÎïÌåÔ˶¯µÄλÒÆ´óС¾ùΪ50 m£¬ÕâÁ½¸öÎïÌåµÄλÒƱض¨Ïàͬ | |
C£® | ζȼƶÁÊýÓÐÕýÓиº£¬ËùÒÔζÈÒ²ÊÇʸÁ¿ | |
D£® | ζȼƶÁÊýµÄÕý¸ººÅ±íʾζȸߵͣ¬²»±íʾ·½Ïò£¬Î¶ÈÊDZêÁ¿ |