1ãå
æ±åºR1ççµé»ï¼åæ ¹æ®ä¸²èçµæµç¸çåçµåè§å¾è®¡ç®åºç¯ççµæµï¼ç¶åç¨UI计ç®åçï¼
åªéåS1æ¶ï¼çµè·¯ä¸åªæR1ï¼æ ¹æ®æ¬§å§å®å¾ï¼
R1ï¼U/Iï¼9/0.3ï¼30欧ï¼
åªéåS2æ¶ï¼Lä¸R1串èï¼æ¤æ¶R1çµåï¼U1ï¼9ï¼3ï¼6V
çµè·¯çµæµï¼Iï¼6/30ï¼0.2A
ç¯çé¢å®åçï¼Pï¼UIï¼3Ã0.2ï¼0.6W
2ã
ç¡®å®çµè·¯è¿æ¥æ¹å¼ï¼ç¶åæ®ä¸¤æ¬¡å¼å
³çéææ
åµæ±åºåé»å¨ççµé»è¡¨è¾¾å¼ï¼å³å¯è§£åºä¹æ¯ã
é½éåæ¶R1ä¸R2并èï¼R1çµæµï¼I1ï¼9/30ï¼0.3A
R2æå°æ¶ï¼çµæµä¸ºï¼Iï¼0.6ï¼0.3ï¼0.3A
R2ï¼9/0.3ï¼30欧
åªéåS3æ¶ï¼R2ä¸ç¯ä¸²èï¼ç¯çæ大çµæµä¸ºæ£å¸¸åå
çµæµï¼Iï¼0.3A
ç¯ççµå为ï¼Uï¼3V
R2ï¼ï¼9ï¼3ï¼/0.3ï¼20欧
R1ï¼R2ï¼3ï¼2
ä¸æ欢è¿è¿½é®ã
追é®ç¬¬2é®çµæµæ大ä¸æ¯0ï¼2Aå
追çsorryâ¦â¦éæ°æ¥ã
åªéåS3æ¶ï¼R2ä¸ç¯ä¸²èï¼ç¯çæ大çµæµä¸ºæ£å¸¸åå
çµæµï¼Iï¼0.2A
ç¯ççµå为ï¼Uï¼3V
R2ï¼ï¼9ï¼3ï¼/0.2ï¼30欧
R1ï¼R2ï¼1ï¼1