Question

Three resistances are connected to form the sides of triangle ABC. The resistance of the side AB is 40 ohm of the side BC is 60 ohm and its side
CA is 100 ohm. The effective resistance between points A and B is:

• A. $\frac{80}{3}\Omega$
• B. $20\Omega$
• C. $32\Omega$
• D. $16\Omega$

Answer 1

Answer: (C)

$32\Omega$

from figure..
$R_{AB}=\frac{40\times 160}{40+160}$
$=\frac{40\times 160}{300}$
$=32$