Question

In the given circuit, each resistor has a value equal to 1 $\Omega$

What is the equivalent resistance across the terminals a and b?

• A. 1/6 $\Omega$
• B. 1/3 $\Omega$
• C. 9/20 $\Omega$
• D. 8/15 $\Omega$

Answer 1

The correct option is D 8/15 $\Omega$

$R_{eq}\Rightarrow$

$R_{ab}=\left\{\right(4||1+4||1\left)||\right(1||4\left)\right\}$

$=(\frac{4}{5}+\frac{4}{5})\parallel \frac{4}{5}=\frac{8}{15}\Omega$