Кто знает как решать??? Подскжмите пожалуйста)))))
Дано:
R1 = 6 Ом
R2 = 4 Ом
I = 9 A
I2 = 3 A
___________
R3 - ?
Решение:
U2 = I2*R2 = 3*4 = 12 (В)
R = U / I = 12/9 = 4/3 (A)
1/R = 1/R1 + 1/R2 + 1/R3
1/R3 = 1/R - 1/R1 - 1/R2 = 3/4-1/6-1/4 = 1/3
R = 3 Ом
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Дано:
R1 = 6 Ом
R2 = 4 Ом
I = 9 A
I2 = 3 A
___________
R3 - ?
Решение:
U2 = I2*R2 = 3*4 = 12 (В)
R = U / I = 12/9 = 4/3 (A)
1/R = 1/R1 + 1/R2 + 1/R3
1/R3 = 1/R - 1/R1 - 1/R2 = 3/4-1/6-1/4 = 1/3
R = 3 Ом