Question

In the circuit shown below, calculate the net resistance of the circuit.

10Ω
15 Ω
ΑΛΛ- -
20 Ω
Λ
5Ω
45 V​

Answer 1

Explanation:

Let, R1 = 10 π

R2 = 15π

R3 = 20 π

R4 = 5π

since, R1 and R2 are connected in series,

therefore, Requivalent = R1 + R2

Requivalent = (10 + 15)π

Requivalent = 25 π

and, R3 and R4 are also connected in series,

therefore, R'equivalent = R3 + R4

R'equivalent = (20 + 5)π

R'equivalent = 25 π

now, for parallel combination,

1/R"equivalent = 1/Requivalent +1/R'equi

1/R"equivalent = 1/25π + 1/25π

1/R"equivalent = 2/25π

R"equivalent = 25/2π

R"equivalent = 12•5 π