Respostas

2014-01-27T10:22:08-02:00
Resposta

A

Pot = V*i
i = Pot / V
i = 840/120
i = 7 A

B

Pot = 840W = 0,84kW
T = 1h

El = Pot * t
El = 0,84*1
El = 0,84kWh

Ou

El = 840Wh