1.
Dane:
R = 440Ω
U = 220V
Szukane:
I = ?
Wzór:
[tex]R = \frac{U}{I} | \times I \\ U = R \times I | \div R \\ I = \frac{U}{R} [/tex]
Obliczenia:
[tex]I = \frac{220}{440} = 0.5A[/tex]
2.
Dane:
U = 90V
I = 5mA = 0,005A
Szukane:
R = ?
Wzór:
[tex]R = \frac{U}{I} [/tex]
Obliczenia:
[tex]R = \frac{90}{0.005} = 18000 \Omega[/tex]
Opór wynosi 18.000Ω
