Question

Ajutați-mă va rooog urgent dau coroana

Answer 1

Răspuns:

Explicație:

$\frac{1}{Rp_1} = \frac{1}{R_1}+ \frac{1}{R_1}+\frac{1}{R_1} = \frac{3}{R_1} => Rp_1 =\frac{R_1}{3} = \frac{3}{3} \Omega = 1 \Omega\\\\\frac{1}{Rp_2} = \frac{1}{R_2}+ \frac{1}{R_3} = \frac{R_2+R_3}{R_2\cdot R_3} => Rp_2 = \frac{R_2\cdot R_3}{R_2 + R_3} =\frac{4\cdot2}{2+4} \Omega= 1.33 \Omega\\\\Rs_1 = R_3 + R_3 = 4\Omega + 4\Omega = 8\Omega\\\\\frac{1}{Rp_3} = \frac{1}{Rs_1}+ \frac{1}{R_2} = \frac{R_2+Rs_1}{R_2\cdot Rs_1}=> Rp_3 = \frac{R_2\cdot Rs_1}{R_2+ Rs_1} = \frac{2 \cdot 8}{2+8}=1.6\Omega$

$Rs = Rp_1 + Rp_2 = 1 + 1.33 = 2.33 \Omega\\\\\frac{1}{R_{AB}} = \frac{1}{R_s}+\frac{1}{Rp_3} = \frac{R_s+Rp_3}{R_s \cdot Rp_3} =>R_{AB} = \frac{R_s \cdot Rp_3}{R_s + Rp_3} = \frac{2.33 \cdot 1.6}{2.33+1.6} \Omega = 0.948 \Omega$