Question

一个电灯标有“PZ220-100”字样，若把它接在110伏的电源上时，其消耗的电功率为 ______瓦．

Answer 1

R=

U 额 2

P 额 =

(220V) 2

100W =484Ω，

P _实=

U 实 2

R =

(110V) 2

484Ω =25W．

故答案为：25W．