解ï¼æå¼RLï¼æ±åºå©ä½é¨åçµè·¯çæ´ç»´åçæçµè·¯ã
1ãæ±Uocãå©ä½é¨ååæ两个ç¸äºç¬ç«çåè·¯ï¼ä¸ä¸ªåè·¯æ¯4Vçµåæºæ¥3Ωçµé»ã1Ωçµé»ä¸²èï¼å æ¤ï¼i=4/ï¼3+1ï¼=1ï¼Aï¼ï¼æ以åæ§çµåæºä¸º2i=2Ã1=2ï¼Vï¼ã
å æ¤ï¼ä¸åæ§çµåæºè¿æ¥ç5Ωçµé»ä¸ççµå为ï¼U1=-2i=-2Vï¼æ¹ååå·¦ã
åç´1Ωçµé»ççµå为ï¼U2=1Ãi=i=1ï¼Vï¼ï¼æ¹ååä¸ã
æ以ï¼Uoc=U1+U2=-2+1=-1ï¼Vï¼ã
2ãæ±Reqãå°4Vçµåæºçè·¯ï¼ä»RLçæå¼å¤å¤å çµåU0ï¼è®¾ä»ä¸ç«¯æµå
¥ççµæµä¸ºI0ã
æ¤æ¶ï¼åç´1Ωçµé»ä¸3Ωçµé»å¹¶èï¼1Ωçµé»ççµæµä¸ºiï¼å并èçµè·¯ä¸¤ç«¯çµå为ï¼1Ãi=iï¼æ¹ååä¸ã5Ωçµé»ä¸¤ç«¯çµåå³åæ§çµåæºçµåï¼ä¸º2iï¼æ¹ååå³ãæ以ï¼U0=1ÃI0-2i+i=I0-iã
åç´1Ωçµé»çµæµä¸ºiï¼ä¸ä¹å¹¶èç3Ωçµé»ççµæµå为ï¼i/3ï¼æ¹ååä¸ãå æ¤ï¼i+i/3=4i/3=I0ï¼å³i=3I0/4ã
æ以ï¼U0=I0-3I0/4=I0/4ï¼å³Req=U0/I0=1/4=0.25ï¼Î©ï¼ã
3ãå½RL=1Ωæ¶ï¼VL=UocÃRL/ï¼Req+RL)=-1Ã1/ï¼1+0.25ï¼=-0.8ï¼Vï¼ï¼
RL=10Ωæ¶ï¼VL=-1Ã10/ï¼0.25+10ï¼=-0.9756ï¼Vï¼ï¼
RL=100Ωæ¶ï¼VL=-1Ã100/ï¼0.25+100ï¼=-100/100.25=-0.9975ï¼Vï¼ã
温馨提示:答案为网友推荐,仅供参考