ÌâÄ¿ÄÚÈÝ
I¡¢Ä³Í¬Ñ§ÔÚ×ö²â²£Á§ÕÛÉäÂʵÄʵÑéÖУ¬Ê¹ÓõÄÊÇ°ëÔ²Ðβ£Á§×©£¬P1¡¢P2¡¢P3¡¢P4ÊÇ°´Ë³Ðò²åÔÚÈíľ°åÉϵĴóÍ·Õ룬Èçͼ1Ëùʾ£®ÏÂÊö¹ØÓÚʵÑé²Ù×÷ÖеÄ×ö·¨£¬ÕýÈ·µÄÊÇ £®£¨ÌîÑ¡Ïî¶ÔÓ¦µÄ×Öĸ£©
A£®ÈôÈÎÒâÑ¡È¡P1¡¢P2Á¬Ïߵķ½ÏòºÍÈëÉäµãAµÄλÖ㬶¼¿ÉÒÔÔÚÔ²»¡¾Ã²àÊʵ±Î»Öô¦²åÉϵÚÈý¸ö´óÍ·Õ룬ʹÆäͬʱµ²×¡P1¡¢P2µÄÏñ
B£®Èç¹ûÈëÉäµãAÇ¡ÔÚ²£Á§×©Ô²ÐÄ´¦£¬¿É²»Ê¹ÓôóÍ·ÕëP4
C£®¿ÉÒÔÓÃP1¡¢P2Á¬Ïß×÷ΪÈëÉä¹âÏߣ¬Ò²¿ÉÒÔÓÃP4¡¢P3Á¬Ïß×÷ΪÈëÉä¹âÏß
D£®Îª¼õСÎó²î£¬P1¡¢P2¼ä¾àºÍP3¡¢P4¼ä¾àÓ¦Êʵ±´óһЩ
II¡¢ÔÚ²âÒ»½Ú¸Éµç³ØµÄµç¶¯ÊƺÍÄÚ×èµÄʵÑéÖУ¬±¸ÓÐÏÂÁÐÆ÷²Ä£º
A£®´ý²â¸Éµç³Ø£¨µç¶¯ÊÆԼΪ1.5V£¬ÄÚ×èԼΪ4¦¸£©
B£®µçѹ±íV1£¨Á¿³Ì0¡«2V£¬ÄÚ×èԼΪ2000¦¸£©
C£®µçѹ±íV2£¨Á¿³Ì0¡«6V£¬ÄÚ×èԼΪ6000¦¸£©
D£®µç×èÏäR1£¨×î´óµç×è99.9¦¸£¬¶î¶¨µçÁ÷1A£©
E£®»¬¶¯±ä×èÆ÷R2£¨×î´óµç×è20¦¸£¬¶î¶¨µçÁ÷2A£©
F£®»¬¶¯±ä×èÆ÷R3£¨×î´óµç×è200¦¸£¬¶î¶¨µçÁ÷1A£©
G£®µç¼üÒ»¸ö£¬µ¼ÏßÈô¸É
£¨1£©Îª·½±ãÇÒÄܽÏ׼ȷµØ½øÐвâÁ¿£¬µçѹ±íӦѡÔñ £¬µç×èÏä»ò»¬¶¯±ä×èÆ÷ӦѡÔñ £¨ÌîдÆ÷²ÄÇ°ÃæµÄ×Öĸ£©£®
£¨2£©ÇëÔÚÏÂÃæËù¸ø·½¿òÄÚ£¬»³öÀûÓÃËùÑ¡Æ÷²Ä²â¸Éµç³ØµÄµç¶¯ÊƺÍÄÚ×èµÄʵÑéµç·ͼ£¬Í¼2£®
£¨3£©Ä³Í¬Ñ§ÔÚʵÑéÖеõ½Á˶à×鷶˵çѹºÍÍâµç×èµÄÊý¾Ý£¬¶ÔËùµÃÊý¾Ý½øÐд¦Àíºó£¬ÔÚ×ø±êÖ½ÉÏ×ö³öÁËÈçÉÏͼÏߣº
ÓÉͼÏߵóö£º¸Éµç³ØµÄµç¶¯ÊÆE= V£¬ÄÚ×èr= ¦¸£¨½á¹û±£ÁôÁ½Î»ÓÐЧÊý×Ö£©£®
A£®ÈôÈÎÒâÑ¡È¡P1¡¢P2Á¬Ïߵķ½ÏòºÍÈëÉäµãAµÄλÖ㬶¼¿ÉÒÔÔÚÔ²»¡¾Ã²àÊʵ±Î»Öô¦²åÉϵÚÈý¸ö´óÍ·Õ룬ʹÆäͬʱµ²×¡P1¡¢P2µÄÏñ
B£®Èç¹ûÈëÉäµãAÇ¡ÔÚ²£Á§×©Ô²ÐÄ´¦£¬¿É²»Ê¹ÓôóÍ·ÕëP4
C£®¿ÉÒÔÓÃP1¡¢P2Á¬Ïß×÷ΪÈëÉä¹âÏߣ¬Ò²¿ÉÒÔÓÃP4¡¢P3Á¬Ïß×÷ΪÈëÉä¹âÏß
D£®Îª¼õСÎó²î£¬P1¡¢P2¼ä¾àºÍP3¡¢P4¼ä¾àÓ¦Êʵ±´óһЩ
II¡¢ÔÚ²âÒ»½Ú¸Éµç³ØµÄµç¶¯ÊƺÍÄÚ×èµÄʵÑéÖУ¬±¸ÓÐÏÂÁÐÆ÷²Ä£º
A£®´ý²â¸Éµç³Ø£¨µç¶¯ÊÆԼΪ1.5V£¬ÄÚ×èԼΪ4¦¸£©
B£®µçѹ±íV1£¨Á¿³Ì0¡«2V£¬ÄÚ×èԼΪ2000¦¸£©
C£®µçѹ±íV2£¨Á¿³Ì0¡«6V£¬ÄÚ×èԼΪ6000¦¸£©
D£®µç×èÏäR1£¨×î´óµç×è99.9¦¸£¬¶î¶¨µçÁ÷1A£©
E£®»¬¶¯±ä×èÆ÷R2£¨×î´óµç×è20¦¸£¬¶î¶¨µçÁ÷2A£©
F£®»¬¶¯±ä×èÆ÷R3£¨×î´óµç×è200¦¸£¬¶î¶¨µçÁ÷1A£©
G£®µç¼üÒ»¸ö£¬µ¼ÏßÈô¸É
£¨1£©Îª·½±ãÇÒÄܽÏ׼ȷµØ½øÐвâÁ¿£¬µçѹ±íӦѡÔñ
£¨2£©ÇëÔÚÏÂÃæËù¸ø·½¿òÄÚ£¬»³öÀûÓÃËùÑ¡Æ÷²Ä²â¸Éµç³ØµÄµç¶¯ÊƺÍÄÚ×èµÄʵÑéµç·ͼ£¬Í¼2£®
£¨3£©Ä³Í¬Ñ§ÔÚʵÑéÖеõ½Á˶à×鷶˵çѹºÍÍâµç×èµÄÊý¾Ý£¬¶ÔËùµÃÊý¾Ý½øÐд¦Àíºó£¬ÔÚ×ø±êÖ½ÉÏ×ö³öÁËÈçÉÏͼÏߣº
ÓÉͼÏߵóö£º¸Éµç³ØµÄµç¶¯ÊÆE=
·ÖÎö£º¢ñÔÚ×ö²â²£Á§ÕÛÉäÂʵÄʵÑéÖУ¬P1¡¢P2Á¬Ïߵķ½ÏòÓ¦²»´ÓAµã¸ú²£Á§×©Ö±½ÇÃæ´¹Ö±£¬Èç¹ûÈëÉäµãAÇ¡ÔÚ²£Á§×©Ô²ÐÄ´¦£¬¿É²»Ê¹ÓôóÍ·ÕëP4£¬ÓÃP1¡¢P2Á¬Ïß×÷ΪÈëÉä¹âÏߣ¬Ò²¿ÉÒÔÓÃP4¡¢P3Á¬Ïß×÷ΪÈëÉä¹âÏߣ¬Îª¼õС²âÁ¿Îó²î£¬P1¡¢P2¼ä¾àºÍP3¡¢P4¼ä¾àÓ¦Êʵ±´óһЩ£®
¢ò£¨1£©Ò»½Ú¸Éµç³ØµÄµç¶¯ÊÆԼΪ1.5V£¬µçѹ±íÁ¿³Ì0¡«2V¼´¿É£®¸ù¾Ý·ü×è·¨²âÁ¿µç¶¯ÊƺÍÄÚ×èµÄʵÑéÔÀí£¬ÐèҪѡÔñµç×èÏ䣮£¨2£©½«µç×èÏäÓëµçѹ±í²¢Áª£¬²¢Á¬½Óµ½µçÔ´Á½¶Ë£®£¨3£©¸ù¾Ý±ÕºÏµç·ŷķ¶¨Âɵõ½µçѹ±í¶ÁÊýÓëµç×èÏäµç×èµÄ¹Øϵʽ£¬¾¹ýÊýѧ±äÐΣ¬µÃ³ö
Óë
µÄ¹Øϵʽ£¬ÔÙÓÉÊýѧ֪ʶÇó³ö¸Éµç³ØµÄµç¶¯ÊÆEºÍÄÚ×èr£®
¢ò£¨1£©Ò»½Ú¸Éµç³ØµÄµç¶¯ÊÆԼΪ1.5V£¬µçѹ±íÁ¿³Ì0¡«2V¼´¿É£®¸ù¾Ý·ü×è·¨²âÁ¿µç¶¯ÊƺÍÄÚ×èµÄʵÑéÔÀí£¬ÐèҪѡÔñµç×èÏ䣮£¨2£©½«µç×èÏäÓëµçѹ±í²¢Áª£¬²¢Á¬½Óµ½µçÔ´Á½¶Ë£®£¨3£©¸ù¾Ý±ÕºÏµç·ŷķ¶¨Âɵõ½µçѹ±í¶ÁÊýÓëµç×èÏäµç×èµÄ¹Øϵʽ£¬¾¹ýÊýѧ±äÐΣ¬µÃ³ö
1 |
R |
1 |
U |
½â´ð£º½â£ºI¡¢A¡¢ÈôÈëÉä¹âÏß´ÓAµã´¹Ö±ÉäÈë²£Á§×©£¬¾¹ý²£Á§ºó·½Ïò²»±ä£¬ÎÞ·¨²âÁ¿ÕÛÉäÂÊ£¬ËùÒÔ²»ÄÜÈÎÒâÑ¡È¡P1¡¢P2Á¬Ïߵķ½ÏòºÍÈëÉäµãµÄλÖ㮹ÊA´íÎó£®
B¡¢Èç¹ûÈëÉäµãAÇ¡ÔÚ²£Á§×©Ô²ÐÄ´¦£¬³öÉä¹âÏß¾ÍÔÚ¹ýAP3Á¬ÏßÉÏ£¬¿ÉÒÔ²»ÓõÚËĸù´óÍ·ÕëP4£®¹ÊBÕýÈ·£®
C¡¢²âÁ¿Ê±£¬¿ÉÒÔÓÃP1¡¢P2Á¬Ïß×÷ΪÈëÉä¹âÏߣ¬Ò²¿ÉÒÔÓÃP4¡¢P3Á¬Ïß×÷ΪÈëÉä¹âÏߣ®¹ÊCÕýÈ·£®
D¡¢P1¡¢P2¼ä¾àºÍP3¡¢P4¼ä¾à½Ï´óʱ£¬ÏàͬµÄƫת¾àÀëÒýÆðµÄ½Ç¶ÈÎó²î»áСЩ£¬Òò´ËΪ¼õСÎó²î£¬P1¡¢P2¼ä¾àºÍP3¡¢P4¼ä¾àÓ¦Êʵ±´óһЩ£®¹ÊDÕýÈ·£®
¹ÊÑ¡BCD
II¡¢£¨1£©Ò»½Ú¸Éµç³ØµÄµç¶¯ÊÆԼΪ1.5V£¬µçѹ±íÁ¿³Ì0¡«2V¼´¿É£¬¼´µçѹ±íÑ¡B£®¸ù¾Ý·ü×è·¨²âÁ¿ÔÀí£¬Òª²â³öµç×èµÄÖµ£¬ËùÒÔҪѡÓõç×èÏ䣬ËùÒÔµç×èÏä»ò»¬¶¯±ä×èÆ÷ӦѡÔñD£®
£¨2£©µç·ͼÈçͼËùʾ£®
£¨3£©¸ù¾Ý±ÕºÏµç·ŷķ¶¨ÂɵãºU=E-
r£¬ÓÉÊýѧ±äÐεãº
=
?
-
£¬ÓÉÊýѧ֪ʶµÃÖª£¬
-
ͼÏóµÄºáÖá½Ø¾à´óСµÈÓÚ
£¬ÔòÓÐ
=0.3£¬µÃµ½r¡Ö3.3¦¸£®Í¼ÏßµÄбÂÊ´óСµÈÓÚ
£¬ÔòÓÐ
=
£¬½âµÃE¡Ö1.4V£®
¹Ê´ð°¸Îª£º
I¡¢BCD
II¡¢£¨1£©B£»D
£¨2£©
£¨3£©1.4£» 3.3£®
B¡¢Èç¹ûÈëÉäµãAÇ¡ÔÚ²£Á§×©Ô²ÐÄ´¦£¬³öÉä¹âÏß¾ÍÔÚ¹ýAP3Á¬ÏßÉÏ£¬¿ÉÒÔ²»ÓõÚËĸù´óÍ·ÕëP4£®¹ÊBÕýÈ·£®
C¡¢²âÁ¿Ê±£¬¿ÉÒÔÓÃP1¡¢P2Á¬Ïß×÷ΪÈëÉä¹âÏߣ¬Ò²¿ÉÒÔÓÃP4¡¢P3Á¬Ïß×÷ΪÈëÉä¹âÏߣ®¹ÊCÕýÈ·£®
D¡¢P1¡¢P2¼ä¾àºÍP3¡¢P4¼ä¾à½Ï´óʱ£¬ÏàͬµÄƫת¾àÀëÒýÆðµÄ½Ç¶ÈÎó²î»áСЩ£¬Òò´ËΪ¼õСÎó²î£¬P1¡¢P2¼ä¾àºÍP3¡¢P4¼ä¾àÓ¦Êʵ±´óһЩ£®¹ÊDÕýÈ·£®
¹ÊÑ¡BCD
II¡¢£¨1£©Ò»½Ú¸Éµç³ØµÄµç¶¯ÊÆԼΪ1.5V£¬µçѹ±íÁ¿³Ì0¡«2V¼´¿É£¬¼´µçѹ±íÑ¡B£®¸ù¾Ý·ü×è·¨²âÁ¿ÔÀí£¬Òª²â³öµç×èµÄÖµ£¬ËùÒÔҪѡÓõç×èÏ䣬ËùÒÔµç×èÏä»ò»¬¶¯±ä×èÆ÷ӦѡÔñD£®
£¨2£©µç·ͼÈçͼËùʾ£®
£¨3£©¸ù¾Ý±ÕºÏµç·ŷķ¶¨ÂɵãºU=E-
U |
R |
1 |
R |
E |
r |
1 |
U |
1 |
r |
1 |
R |
1 |
U |
1 |
r |
1 |
r |
E |
r |
E |
r |
0.3 |
0.7 |
¹Ê´ð°¸Îª£º
I¡¢BCD
II¡¢£¨1£©B£»D
£¨2£©
£¨3£©1.4£» 3.3£®
µãÆÀ£º±¾Ì⿼²é¶Ô²åÕë·¨²â¶¨²£Á§×©ÕÛÉäÂÊÔÀíµÄÀí½âºÍ·ü×è·¨²âÁ¿µçÔ´µÄµç¶¯ÊƺÍÄÚ×èÔÀíµÄÀí½â£®¸ù¾Ý±ÕºÏµç·ŷķ¶¨ÂɽøÐÐÊýѧ±äÐΣ¬½«·ÇÏßÐÔ¹ØϵµÄÁ½¸öÁ¿£¬±ä³ÉÏßÐÔ¹ØϵÀ´Ñо¿£¬²ÉÓõÄÊÇת»»·¨Ë¼Î¬£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿