1ã解ï¼æ¾ç¶i1=2Aãæ ¹æ®KVLï¼
10i2=40i3+40ï¼æ ¹æ®KCLï¼i1+i2+i3=0ã
解æ¹ç¨ç»ï¼i2=-0.8ï¼i3=-1.2ã
2ã解ï¼å¦ä¸å¾ï¼
æ 注åº4个èç¹AãBãCãDï¼ä»¥ååæ¡æ¯è·¯ççµæµI1ãI2ãI3åI4ãæ¾ç¶I1=iã
对äºèç¹Aï¼æ ¹æ®KCLï¼I4+2=I1+2ï¼æ以ï¼I4=I1=iã
对äºèç¹Bï¼æ ¹æ®KCLï¼I1+2+3+1=I2ï¼æ以ï¼I2=i+6ã
对äºèç¹Cï¼æ ¹æ®KCLï¼I2+1=1+I3ï¼æ以ï¼I3=I2=i+6ã
æ ¹æ®KVLï¼1ÃI1+2I2+4I3+3I4=5+10-12+7=10ãä»£å ¥åçµæµè¡¨è¾¾å¼ï¼
i+2ï¼i+6ï¼+4ï¼i+6ï¼+3i=10ã
解å¾ï¼i=-2.6ï¼Aï¼ã