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1 有一他激式直流發電機,感應電動勢為 120V,電樞電阻為 0.2Ω,電樞電流為 50A,若忽略電刷壓降,則輸出功率為何?
A 6000W
B 5500W
C 5000W
D 4500W

V = E - IARA = 120 - 50 ×0.2 = 110V

P = V × IL = 110×50 = 5500W