Question

Proszę o pomoc PILNE!!!!!!!!!

a)P=2000W U=10V J=?

b)J=3A, R=oma u,p=?

c)U=600V R=10omów J,P=?

d)P=100W J=2ampery U,R=?

Answer 1

A)
P = 2000 W
U = 10 V
P = U * I
I = P / U
I = 2000 W /10 V
I = 200 A
[ W ] = [ V*A]
b)
I = 3 A
R = 10 Ω = 10 V/A
R = U / I
U = R * I
U = 10 V/A * 3 A
U = 30 V
P = U * I
P = 30 V * 3 A
P = 90 W
c)
U = 600 V
R = 10 Ω
R = U / I
I = U / R
I = 600 V / 10 Ω
I = 60 A
P = U * I
P = 600 V * 60 A
P = 36000 Ω = 36 kΩ
1 kΩ = 1000 Ω
d)
P = 100 W
I = 2 A
P = U * I
U = P / I
U = 100 W /2 A
U = 50 V
R = U / I
R = 50 V / 2 A
R = 25 Ω