What is the equivalent resistance between points a and b when R = 12 Ω?
A) 20 Ω
B) 16 Ω
C) 24 Ω
D) 28 Ω
E) 6.0 Ω

Question

What is the equivalent resistance between points a and b when R = 12 Ω? 
A) 20 Ω 
B) 16 Ω 
C) 24 Ω 
D) 28 Ω 
E) 6.0 Ω

Quizplus · Accepted Answer

For this circuit, we can simplify it as two resistors in parallel (6 Ω and 12 Ω) in series with a 12 Ω resistor. The equivalent resistance of the parallel combination is (6*12)/(6+12) = 4 Ω. Therefore, the total equivalent resistance is 4+12 = 16 Ω between points a and b.

What Is the Equivalent Resistance Between Points a and B