Question

No esquema ao lado,

determine:

a) o resistor equivalente (REQ).

b) as voltagens U1, U2 e U3.

c) as correntes i1, i2 e i3 e iT.​

Answer 1

A)

$\frac{36*18}{36+18}=12$

$\frac{12*12}{12+12}=6$

$R_{eq}=6$ Ω

B)

$U_{1}=\frac{R_{eq}}{R_{eq}} *U$

$U_{2}=\frac{R_{eq}}{R_{eq}} *U$

$U_{1}=\frac{R_{eq}}{R_{eq}} *U$

$U_{1}=U_{2}=U_{3}=72$ V

C)

$I_{1}=\frac{R_{eq} }{R_{1}} *I$

$I_{1}=\frac{6}{36} *12$

$I_{1}=2$ A

$I_{2}=\frac{R_{eq} }{R_{2}} *I$

$I_{2}=\frac{6}{18} *12$

$I_{2}=4$ A

$I_{3}=\frac{R_{eq} }{R_{3}} *I$

$I_{3}=\frac{6}{12} *12$

$I_{3}=6$ A

U = R · I

72 = 6 · I

I = 12 A