Question

A wire of resistance 10$\Omega$ is bent to form a complete circle. Find its resistance between two diametrically opposite point.

• A. $5\Omega$
• B. $2.5\Omega$
• C. $1.25\Omega$
• D. $\frac{10}{3}\Omega$

Answer 1

Answer: (B)

$2.5\Omega$

For diametrically opposite points A and C, resistance of each branch is 5 ohm and they are in parallel, so the equivalent resistance between the dimetrically opposite points is 2.5 ohm.