ä¸ãæ¯è·¯çµæµæ³ï¼è®¾ä¸é¢5Ωçµé»çµæµä¸ºI1ï¼æ¹ååå³ï¼10Ωçµé»çµæµä¸ºI2ï¼æ¹ååå³ã
ããåæ ¹æ®KCLï¼I1=I+I2ã
ããæ ¹æ®KVLï¼5I1+5I=10ï¼10I2=20+5Iã
ãã解æ¹ç¨ç»ï¼å¾å°ï¼I1=2ï¼I2=2ï¼I=0ã
ããå³I=0Aã
ããäºãå å å®çï¼
ãã1ã10Vçµåæºåç¬ä½ç¨æ¶ï¼20Vçµåæºçè·¯ã
ããæ¤æ¶åç´ç5Ωçµé»ä¸10Ωçµé»å¹¶èï¼çµé»ä¸ºR1=5â¥10=10/3ï¼Î©ï¼ï¼å¤çµè·¯çµé»ä¸ºï¼R=5+R1=5+10/3=25/3ï¼Î©ï¼ã
ãã10Vçµåæºè¾åºçµæµä¸ºï¼I1=10/ï¼25/3ï¼=6/5ï¼Aï¼ï¼å¹¶èæ¯è·¯çµåï¼U=I1ÃR1=ï¼6/5ï¼Ãï¼10/3ï¼=4ï¼Vï¼ã
ããæ以ï¼5Ωçµé»ççµæµä¸ºï¼I'=U/5=4/5=0.8ï¼Aï¼ï¼æ¹ååä¸ã
ãã2ã20Vçµåæºåç¬ä½ç¨æ¶ï¼10Vçµåæºçè·¯ã
ããæ¤æ¶2个5Ωçµé»å¹¶èï¼çµé»å¼ä¸ºï¼R2=5â¥5=2.5ï¼Î©ï¼ãå¤çµè·¯çµé»ä¸ºï¼R=10=2.5=12.5ï¼Î©ï¼ã
ããçµè·¯çµæµä¸ºï¼I2=20/R=20/12.5=1.6ï¼Aï¼ï¼å¯¹äº10Ωçµé»æ¹å为åå³ã
ãã并èæ¯è·¯çµå为ï¼U=I2ÃR2=1.6Ã2.5=4ï¼Vï¼ï¼æ¹å为ä¸æ£ä¸è´ã
ããå æ¤5Ωçµé»ççµæµä¸ºï¼I"=-U/5=-4/5=-0.8ï¼Aï¼ã
ãã3ãæ ¹æ®å å å®çï¼I=I'+I"=0.8-0.8=0ï¼Aï¼ã
温馨提示:答案为网友推荐,仅供参考