oblicz moc i opór elektryczny urządzenia podłączonego do sieci 230V, jeżeli płynie przez nie prąd 6A
dane:
U = 230 V
I = 6 A
szukane;
P = ?
R = ?
P = U * I
P = 230V * 6A = 1 380 W
1 kW = 1000 W
P = 1,38 kW
==========
R = U/I
R = 230V/6A = 38,3 Ω
R = 38,3 Ω
=========
Obliczamy moc urządzenia:
P = U·I
P = 230·6
P = 1380W
Z prawa Ohma obliczamy opór:
R = 230/6
R ≈ 38,(3)Ω
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dane:
U = 230 V
I = 6 A
szukane;
P = ?
R = ?
P = U * I
P = 230V * 6A = 1 380 W
1 kW = 1000 W
P = 1,38 kW
==========
R = U/I
R = 230V/6A = 38,3 Ω
R = 38,3 Ω
=========
Obliczamy moc urządzenia:
P = U·I
P = 230·6
P = 1380W
Z prawa Ohma obliczamy opór:
R = U/I
R = 230/6
R ≈ 38,(3)Ω