Question

Oblicz U i I jezeli P=20W a R= 10 omow

Answer 1

P=20[W]
R=10[Ω]
I=?
U=?
I²=P/R
I²=20/10=2
I=√2=1,41[A]
U²=P×R
U²=20×10=200
U=√200[V]

Answer 2

R= 10 OMÓW
P=20W
U=R*I

P=I*U
P=I*R*I
P=R*I KWADRAT
20=10*I KWADRAT /:10
2=I KWADRAT
I= PIERWSTEK Z 2 [A]

U=R*I
U=10* PIERWIASTEK Z 2
U= 10 I PIERWIASTEK Z 2 [V]