Объяснение:
U = U1 = 15 B
I1 = U1/R1 = 15/2 = 7.5 A
r45 = R4/2 = 3/2 = 1.5 Ом
r345 = R3+r45 = 1.5+1.5 = 3 Ома
r2345 = R2*r345 / (R2+r345) = 6*3 / (6+3) = 2 Ома
r23456 = R6+r2345 = 4+2 = 6 Ом
I6 = U / r23456 = 15 / 6 = 2.5 A
U6 = I6*R6 = 2.5*4 = 10 B
U2 = U-U6 = 15 - 10 = 5 B
I2 = U2 / R2 = 5 / 6 = =0.83 A
I3 = U2 / r345 = 5 / 3 = = 1.67 A
U3 = I3*R3 = 1.67* 1.5 = = 2.5 V
U4=U5 = U2 - U3 = 5 - 2.5 = 2.5 V
I4 = I5 = U4/R4 = 2.5 / 3 == 0.83 A
P = U*(I1+I6) = 15* (7.5+2.5) = 150 Вт
Объяснение:
U = U1 = 15 B
I1 = U1/R1 = 15/2 = 7.5 A
r45 = R4/2 = 3/2 = 1.5 Ом
r345 = R3+r45 = 1.5+1.5 = 3 Ома
r2345 = R2*r345 / (R2+r345) = 6*3 / (6+3) = 2 Ома
r23456 = R6+r2345 = 4+2 = 6 Ом
I6 = U / r23456 = 15 / 6 = 2.5 A
U6 = I6*R6 = 2.5*4 = 10 B
U2 = U-U6 = 15 - 10 = 5 B
I2 = U2 / R2 = 5 / 6 = =0.83 A
I3 = U2 / r345 = 5 / 3 = = 1.67 A
U3 = I3*R3 = 1.67* 1.5 = = 2.5 V
U4=U5 = U2 - U3 = 5 - 2.5 = 2.5 V
I4 = I5 = U4/R4 = 2.5 / 3 == 0.83 A
P = U*(I1+I6) = 15* (7.5+2.5) = 150 Вт