1 =1 =3.6 106
I = Q t 1 = 1 1 I = Q t = 20 = 2 10
t Q I = Q t 1 = 1 1
omiga
1 1 2
* *
I = U R I = U R = 220 0.27 807 I = U U = IR R I = U R U = IR = 0. 45 6.3 2.8 I = U R = U R I I = U R R = U I = 7.2 = 18 0.4
R = U I I R R 1 3 I = U I R I = U R = 6 = 0.3 20
R I R = U 2 2 2 I R I = U 1 1 R I = U R = 2.3 1 0.3 8.3 1 R = U = 3.5 2 I 0.3 11.7 2 1
R I = U 1 1 R R I = U 2 2 R 1 2 I = U R R I I + I U R 1 2 = U R + U R 1 2 1 = 1 R + 1 R R 1 2
P P = W t
I = P U = 25 = 0.11 220 R = U = 220 = 2000 I 0.11 I = P = 60 = 0.27 U 220 R = U I = 220 = 815 0.27 I = U R = 210 1 = 0.105 1 2000 P U I = 210 0.105 = 22.1 1 1 1 I = U R = 230 2 = 0.115 2 2000 P 2 = U2 I 2 = 230 0115. 265.
I = U R = 36 = 0.6 60
= t 2 t t t 1 3 1
1 1
1 2 1 1 4 3 1 9 1 2 1 500 2 1 50 1000 2 1 4
d o chu n
I = U R 1 = 1 P = W t = UI Q c = m(t - t 0)