What is the equivalent resistance in the circuit shown in the figure?
A) 80 Ω
B) 55 Ω
C) 50 Ω
D) 35 Ω

Question

What is the equivalent resistance in the circuit shown in the figure? 
A) 80 Ω 
B) 55 Ω 
C) 50 Ω 
D) 35 Ω

Quizplus · Accepted Answer

To calculate the equivalent resistance, first we can simplify the circuit by combining the three resistors in parallel. The equivalent resistance of 6 Ω, 12 Ω, and 18 Ω in parallel is:

1/Req = 1/6 + 1/12 + 1/18 
1/Req = 1/3 
Req = 3 Ω

Now we have two resistors in series with each other, which we can add together to find the total equivalent resistance:

Req = 3 + 47 = 50 Ω

Therefore, the answer is C, 50 Ω.

What Is the Equivalent Resistance in the Circuit Shown in the Figure