Zadanie 1
I = P/U = 180/230 = 0,78A
Zadanie 2
q = I*t = 0,78*50 = 39C
Zadanie 3
E = P*t = 180*50 = 9000J = 9kJ
Zadanie 4
E₁ = P*t + P*t = 2P*t = 2*9 = 18kJ | Energia zużywana przez 1 dzień
E₃₆₅ = 18*365 = 6570kJ = 6,57MJ
Zadanie 5
1kWh = 0,45zł
E = P*t = 0,18*20 = 3,6kWh
3,6*0,45 = 1,62zł