" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
R = 20 Ω
t = 30 min = 1800 s
W = 1 kWh = 1000W * 3600s = 3600000 J [W*s = J/s*s = J]
I = ? [A]
W = U*I*t
R = U/I
U = R*I
W = R*I*I*t
W = R*I²*t / :R*t
I² = W/R*t
I = √(W/R*t)
[I] = [√(J/*Ω*s) = [√(v*A*s/*v/A*s) = [√A² = A]
I = √(3600000/20*1800) A
I = √(3600000/36000) A
I = √(3600) A
I = 60 A
Odp: Natężenie prądu wynosi 60 A.