2ã解ï¼t=0-æ¶ï¼çµå®¹å åæ¾çµï¼æ以ucï¼0-ï¼=0ã
æ¢è·¯å®çï¼ucï¼0+ï¼=ucï¼0-ï¼=0ï¼æ以t=0+æ¶ï¼çµå®¹ç¸å½äºä¸ä¸ªçµå为é¶ççµåæºï¼çè·¯ï¼ï¼ä¸å¾ã
å æ¤ï¼iï¼0+ï¼=10/ï¼2+3ï¼=2ï¼Aï¼ã
t=âæ¶ï¼çµå®¹å 满çµè·ï¼ç¸å½äºå¼è·¯ï¼ä¸å¾ï¼
æ以ï¼ucï¼âï¼=10Vï¼iï¼âï¼=0ã
å°çµåæºçè·¯ï¼ä»çµå®¹ä¸¤ç«¯çè¿å»ï¼
R=3=2=5ï¼Î©ï¼ï¼æ¶é´å¸¸æ°ï¼Ï=RC=5Ã0.2=1ï¼sï¼ã
ä¸è¦ç´ æ³ï¼fï¼tï¼=fï¼âï¼+[fï¼0+ï¼-fï¼âï¼]e^ï¼-t/Ïï¼ã
ucï¼tï¼=10+ï¼0-10ï¼e^ï¼-t/1ï¼=10-10e^ï¼-tï¼ ï¼Vï¼ã
iï¼tï¼=0+ï¼2-0ï¼e^ï¼-t/1ï¼=2e^ï¼-tï¼ ï¼Aï¼ã
3ã解ï¼ç±äºiLï¼0-ï¼=0ï¼æ ¹æ®æ¢è·¯å®çï¼iLï¼0+ï¼=iLï¼0-ï¼=0ï¼æ以t=0+æ¶ï¼çµæç¸å½äºä¸ä¸ª0Aççµæµæºï¼å¼è·¯ï¼ï¼å¦ä¸ï¼
æ以ï¼urï¼0+ï¼=0Vã
t=âæ¶ï¼çµæç¸å½äºçè·¯ï¼
iLï¼âï¼=10/2=5ï¼Aï¼ï¼urï¼âï¼=10Vã
R=2Ωï¼Ï=L/R=0.5/2=0.25ï¼sï¼ã
iLï¼tï¼=5+ï¼0-5ï¼e^ï¼-t/0.25ï¼=5-5e^ï¼-4tï¼ ï¼Aï¼ã
urï¼tï¼=10+ï¼0-10ï¼e^ï¼-t/0.25ï¼=10-10e^ï¼-4tï¼ ï¼Vï¼ã