48. 有兩白熾燈泡,其額定都是110V/100W,今將二燈泡串聯後接於110V電源,則總功率為何?
(A)200W
(B)100W
(C)50W
(D)25W
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統計: A(24), B(43), C(273), D(15), E(0) #2054893
統計: A(24), B(43), C(273), D(15), E(0) #2054893