Odpowiedź :
t = 2h
W = 1,1 kWh
U = 230V
-------------------
I = ?
W = P*t /:t
P = W/t = 1,1kWh/2h = 0,55 kW
P = 550 W - moc grzejnika
P = U*I /:U
I = P/U = 550W/230V = 55/23 A ≈2,391 A
I = 2,4 A - natężenie prądu
t = 2h
W = 1,1 kWh
U = 230V
-------------------
I = ?
W = P*t /:t
P = W/t = 1,1kWh/2h = 0,55 kW
P = 550 W - moc grzejnika
P = U*I /:U
I = P/U = 550W/230V = 55/23 A ≈2,391 A
I = 2,4 A - natężenie prądu