ÌâÄ¿ÄÚÈÝ
16£®Ä³Í¬Ñ§²âÁ¿Ö±Á÷ºãÁ÷Ô´µÄÊä³öµçÁ÷I0ºÍ¶¨Öµµç×èRxµÄ×èÖµ£¬µç·ÈçͼlËùʾ£¬ÊµÑéÆ÷²ÄÈçÏ£ºÖ±Á÷ºãÁ÷Ô´£¨µçÔ´Êä³öµÄÖ±Á÷µçÁ÷I0±£³Ö²»±ä£¬I0ԼΪ0.8A£©£»
´ý²âµç×èRx £¨×èֵԼΪ20¦¸£©£»
»¬¶¯±ä×èÆ÷R£¨×î´ó×èֵԼΪ50¦¸£©£»
µçѹ±íV£¨Á¿³Ì15V£¬ÄÚ×èԼΪ15k¦¸£©£»
µçÁ÷±íA£¨Á¿³Ì0.6A£¬ÄÚ×èԼΪ0.2¦¸£©£»
Çë»Ø´ðÏÂÁÐÎÊÌ⣮
£¨1£©ÊµÑéËùÓÃÆ÷²ÄÈçͼ2Ëùʾ£¬Í¼Öв¿·Öµç·ÒѾÁ¬½ÓºÃ£¬ÇëÍê³ÉʵÑéµç·µÄÁ¬½Ó£®
£¨2£©µç·¿ª¹ØS±ÕºÏÇ°£¬»¬¶¯±ä×èÆ÷µÄ»¬Æ¬PÓ¦»¬¶¯µ½a´¦£¨Ñ¡Ìî¡°a¡±¡¢¡°b¡±£©£¬ÆäÀíÓÉÊDZ£»¤µçÁ÷±í£¬±£Ö¤¿ª¹Ø±ÕºÏºó£¬Á÷¹ýµçÁ÷±íµÄµçÁ÷²»»á³¬¹ýµçÁ÷±íÁ¿³Ì£»
£¨3£©ËùµÃʵÑéÊý¾ÝÈçÏÂ±í£¬ÇëÔÚͼ3ËùʾµÄÖ±½Ç×ø±êϵÉÏ»³öU-IͼÏó£®
1 | 2 | 3 | 4 | 5 | |
µçÁ÷±íµÄʾÊýI/A | 0.20 | 0.30 | 0.40 | 0.50 | 0.60 |
µçѹ±íµÄʾÊýU/V | 13.9 | 12.1 | 10.2 | 7.60 | 6.1 |
·ÖÎö £¨1£©¸ù¾ÝÔÀíͼ¿ÉµÃ³ö¶ÔÓ¦µÄʵÎïͼ£»
£¨2£©¸ù¾Ýµç·½á¹¹½øÐзÖÎö£¬Ã÷È·»¬¶¯±ä×èÆ÷µÄ×÷Ó㬴Ӷø¸ù¾Ý°²È«ÐÔÔÔò½øÐзÖÎö£»
£¨3£©¸ù¾ÝÃèµã·¨¿ÉµÃ³ö¶ÔÓ¦µÄͼÏó£»
£¨4£©¸ù¾Ýµç·ºÍͼÏó½øÐзÖÎö£¬ÓÉ´®²¢Áªµç·µÄ¹æÂɽøÐзÖÎö´Ó¶øÈ·¶¨ºã¶¨µçÁ÷ÒÔ¼°µç×èµÄ×èÖµ£®
½â´ð ½â£º£¨1£©¸ù¾ÝÔÀíͼ¿ÉµÃ³ö¶ÔÓ¦µÄʵÎïͼ£»
£¨2£©ÎªÁËÈõçÁ÷±íÖеçÁ÷ÓÉ×îСֵ¿ªÊ¼µ÷½Ú£¬±£Ö¤¿ª¹ØS±ÕºÏºó£¬Á÷¹ýµçÁ÷±íµÄµçÁ÷²»»á³¬¹ýµçÁ÷±íÁ¿³Ì£»»¬¶¯±ä×èÆ÷Ó¦´Ó×î´ó×èÖµ¿ªÊ¼µ÷½Ú£»
£¨3£©¸ù¾Ý±íÖÐÊý¾Ý¿ÉÒԵóö¶ÔÓ¦µÄU-IͼÏó£»
£¨4£©µ±µçѹΪÁãʱ´Ëʱ»¬¶¯±ä×èÆ÷¶Ì·£¬Ôò´ËʱµçÁ÷ΪֱÁ÷µçÔ´ÖеĵçÁ÷£¬Ôò¿ÉÖª£¬µçÁ÷ԼΪ0.87A£»
ÓÉͼ¿ÉÖª£¬µ±µçѹΪ10Vʱ£¬µçÁ÷Ϊ0.40A£¬Ôò´ËʱÁ÷¹ý´ý²âµç×èµÄµçÁ÷I=0.87-0.40=0.47A£¬ÓÉÅ·Ä·¶¨ÂɿɵãºRx=$\frac{U}{I}$=$\frac{10}{0.47}$¡Ö21¦¸
¹Ê´ð°¸Îª£º£¨1£©ÈçͼËùʾ£»£¨2£©a£»±£»¤µçÁ÷±í£¬±£Ö¤¿ª¹Ø±ÕºÏºó£¬Á÷¹ýµçÁ÷±íµÄµçÁ÷²»»á³¬¹ýµçÁ÷±íÁ¿³Ì£»£¨3£©ÈçͼËùʾ£»£¨4£©0.87£»21
µãÆÀ ±¾Ì⿼²éʵÑéÔÀíµÄ·ÖÎöÒÔ¼°ÊµÎïͼµÄÁ¬½ÓµÈ£¬ÒªÇóÄÜͨ¹ýÌâÒâÃ÷ȷʵÑéÔÀí£¬ÔÙ½áºÏËùѧ¹ýµÄÎïÀí¹æÂɽøÐзÖÎö£¬¹Ø¼üÔÚÓÚÃ÷È·µç·½á¹¹£¬ÖªµÀ×ܵçÁ÷²»±ä£¬ÔÙ½áºÏͼÏó½øÐзÖÎö¼´¿É£®
A£® | ËÙÂÊ | B£® | ËÙ¶È | C£® | ¶¯ÄÜ | D£® | »úеÄÜ |
A£® | $\frac{2\sqrt{3}¦ÐR}{3v}$ | B£® | $\frac{2¦ÐR}{3v}$ | C£® | $\frac{¦ÐR}{3v}$ | D£® | $\frac{2\sqrt{3}¦ÐR}{9v}$ |
£¨1£©ÇëÄãÓñʻÏßÔÚͼ¼×ÉϼÓÉÏÕâÌõµ¼Ïߣ»
£¨2£©¶ÔСÁÁ¸ÄÕýºóµÄµç·£¬Ôڱպϵç¼üÇ°£¬»¬¶¯±ä×èÆ÷µÄ»¬Æ¬Ó¦ÏÈÖÃÓÚ×î×ó¶Ë£¨Ñ¡Ìî¡°×î×ó¶Ë¡±»ò¡°×îÓҶˡ±£©£®
£¨3£©±ÕºÏµç¼üºó£¬µ÷½Ú»¬¶¯±ä×èÆ÷£¬²âµÃÒ»×éµçѹ±íºÍµçÁ÷±íµÄʾÊý¼Ç¼ÈçÏÂ±í£º
µçÁ÷I/A | 0 | 0.08 | 0.16 | 0.24 | 0.32 | 0.40 | 0.48 |
µçѹU/V | 0 | 0.63 | 1.22 | 1.68 | 1.97 | 2.23 | 2.44 |
£¨4£©ÓÉͼÏó¿ÉÖª£ºËæ×ÅζȵÄÉý¸ß£¬Ç¦Ð¾µÄµç×èÂʼõС£¨Ñ¡Ìî¡°Ôö´ó¡±¡¢¡°¼õС¡±»ò¡°²»±ä¡±£©
A£® | 3¿Å¡°³¬¼¶µØÇò¡±Ô˶¯µÄÏßËÙ¶ÈÖ®±È | |
B£® | 3¿Å¡°³¬¼¶µØÇò¡±Ô˶¯ËùÊܵÄÒýÁ¦Ö®±È | |
C£® | 3¿Å¡°³¬¼¶µØÇò¡±Ô˶¯µÄÏòÐļÓËÙ¶ÈÖ®±È | |
D£® | ¸ÃºãÐǵÄÖÊÁ¿ |
A£® | µØÃæ | B£® | Ìú¹ì | C£® | Áгµ | D£® | Ìú·ÅÔµÄÊ÷ľ |