Respostas

2013-12-18T11:54:10-02:00
110 V ---- 2200 W
 55 V ----- x W

x = 55 * 2200 / 110 --> x = 121000/110 --> x = 1100W
1 2 1
2013-12-18T13:38:40-02:00
P = 2200
V = 110
P = VI
Determinando I:
2200 = 110I
I = 2200/110
I = 20

Substituindo com a tensão de 55V:
P = 55*20
P = 1100W