Question

If four resistances are connected as shown in the fig. between A and B, the effective resistance is:

• A. $3\Omega$
• B. $1\Omega$
• C. $2.4\Omega$
• D. $2\Omega$

Answer 1

The correct option is D $2\Omega$

Simplified, or equivalent circuit diagram is shown in the figures.
From figure, effective resistance:
$R_{eq}=\frac{4\times 4}{2\times 4}$ $=2\Omega$