1. 20 Wï¼è¿ä¸ªä¸ç¨è¯´æäºå§ï¼
2.
å
çå 个çµé»å§ã4Ωå 为åæåæºå¹¶èï¼æ以æèªå·¦åå³ç8/4 = 2 Aççµæµã8 Ωçµé»æèªå·¦åå³i4ççµæµã2 Ωçµé»å8 Ωçµé»å¹¶èï¼æ以2 Ωçµé»ä¸æèªå³åå·¦ç4i4ççµæµã
ä¹ååçµæµæ¹ç¨ï¼å个èç¹ï¼ä»å·¦è³å³ä¾æ¬¡ä¸ºï¼
i2 = i1 + 2
1 + 2 + i1 = i3
i4 + 4i4 = 1 + i2
i3 = i4 + 4i4
ç¶å解æ¹ç¨å³å¯ï¼ä½ èªå·±ç®ä¸ä¸å§ã
3.
R2 R3并èï¼çæçµé»æ¯(R2R3)/(R2+R3)ï¼ä¹ååR1串èï¼æ¯R1 + (R2R3)/(R2+R3)
4.
è¿æ¯çæçµé»çé®é¢ï¼çµåæºçä½éè·¯ï¼çµæµæºçä½æè·¯ãä¸æ¹310 Ωå510 Ω串èï¼æ¯820 Ωï¼ç¶åå左侧10 Ω并èï¼æ¯9.88 Ωï¼æåå510 Ω串èï¼æ¯519.9 Ωã
5.
è¿å°±æ¯ä¸ªååçµè·¯ï¼æ³¨æ符å·ï¼u = -(us - iRs)
6.
åªè¦ç®åºRsä¸ççµæµï¼å°±å¯ä»¥ç¥éRsä¸çµåï¼å³å¤åï¼u = (is + i)Rs
7.
çµå®¹çµåä¸å
许çªåï¼æ以ææ±çµåå³å¼å
³å¨ä½åçuc稳å®çµåï¼å³uc = 0
8.9.
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10.
å¥å®ä¹ï¼åçå æ°å°±æ¯æååçåè§å¨åççæ¯å¼ï¼5000/(5000^2 + 4000^2)^0.5
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