Wykonaj odpowiednie obliczenia i uzupełnij poniższą tabelę .
Odbiornik U(V) I(A) P(W) R(omega)
A 12 3 ..... .........
B .... 5 20 .......
C .... 1,5 .... 12
D 10 ..... 10 ......
E 200 ..... .... 50
F ..... ..... 3 12
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Odbiornik A:
U = 12V
I = 3A
P = UI = 12*3 = 36W
R = U/I = 12/3 = 4Ω
Odbiornik B:
I = 5A
P = 20W
U = P/I = 20/5 = 4V
R = U/I = 4/5 = 0,8Ω
Odbiornik C:
R = 12Ω
I = 1,5A
U = RI = 12*1,5 = 18V
P = UI = 18*1,5 = 27W
Odbiornik D:
U = 10V
P = 10W
I = P/U = 10/10 = 1A
R = U/I = 10/1 = 10Ω
Odbiornik E:
U = 200V
R = 50Ω
I = U/R = 200/50 = 4A
P = UI = 200*4 = 800W
Odbiornik F:
P = 3W
R = 12Ω
P = UI, ale I = U/R, więc:
P = U²/R
U² = PR
U = √(PR) = √(3*12) = √36 = 6V
I = P/U = 3/6 = 0,5A