Question

URGENTE Calcule a resistência equivalente:

Answer 1

a)

$Rab = 8 + 7 + 10 = 25 \: ohms$

b)

$R = \frac{2 \times 3}{2 + 3} = \frac{6}{5} \\ \\ Rab = \frac{ \frac{6}{5} \times 6 }{ \frac{6}{5} + 6} \\ Rab = \frac{ \frac{36}{5} }{ \frac{36}{5} } \\ Rab = 1 \: ohm$

c) analogamente, dará 10 ohm.

$\frac{1}{Rab} = \frac{1}{20} + \frac{1}{30} + \frac{1}{60} \\ \frac{1}{Rab} = \frac{3}{60} + \frac{2}{60} + \frac{1}{60} \\ \frac{1}{Rab} = \frac{6}{60} \\ Rab = 10$

d)

$R = \frac{4 \times 6}{4 + 6} = 2,4 \\ \\ Rab = 2,4 + 2,6 + 5 = 10 \: ohms$