Question

Four resistors, $100\Omega ,200\Omega ,300\Omega$, and $400\Omega$ are connected to form four sides of a square. The resistors can be connected in any order. What is the maximum possible equivalent resistance across the diagonal of the square?

• A. $210\Omega$
• B. $240\Omega$
• C. $300\Omega$
• D. $250\Omega$

Answer 1

The correct option is D $250\Omega$

$R_{eff}^{max}=\frac{5R\times 5R}{5R+5R}$ where $R=100$
$=2.5R=250$.