ch27-p072 - 72. (a) Since Rtank = 140 , i = 12 V (10 + 140...

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72. (a) Since ( ) 2 tank 140 , 12V 10 140 8.0 10 A Ri =Ω = +Ω = × . (b) Now, R tank = (140 + 20 )/2 = 80 , so i = 12 V/(10
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