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I=2A
U=10V
R=?
------------------------------------------------------------
I=U/R
R=U/I=10V/2A=5Ω
==============================================
2)
q=10C
R=10Ω
U=10V
t=?
-----------------------------------------------------------------
I=U/R=10V/10Ω=1A
q=I*t
t=q/I=10C/1A=10s
===================================================
3)
U=8V
I=0,4A
P=?
----------------------------------------------
P=U*I=8V*0,4A=3,2W
Zad 1
R=U/I
I=2A
U=10V
R=10/2
R=5 omów.
Zad2.
I = Q/T
t=?
q=10c
R=10
U=1OV
R=U/I
I=U/R
I=10/10
I=1A
T=Q/I
T=10/1
T=10s.
Zad.3
P=U*I
P=8*0.4
P=3.2 W