ï¼1ï¼
RL=Ué¢^2/Pé¢=36/3=12欧
æ ¹æ®P=U^2/R
På¨aï¼
Pé¢=Ué¢^2/RL (1)
På¨bï¼
Pé¢/9=Uå®^2/RL (2)
(1)/(2)
Uå®=2V
串èçµè·¯ï¼
Uå®/Uab=RL/Rab
2/4=12/Rab
Rab=24欧
ï¼2ï¼
æ¤æ¶R1R2并èï¼çµå表çéç¨å¤§äºçµæºçµåï¼åªèèçµæµè¡¨ä¸è¶
è¿3Aå°±å¯ä»¥äºã
I1=U/R1=6/10=0.6A
I2=3-I1=2.4A
R2=U/I2=6/2.4=2.5欧
å³ï¼
24欧â¥R2â¥2.5欧
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