Question

A resistance of  10ohm is bent in the form of a closed cirle. What is the effective resistance between the two pints of any diameter of this circle?

Answer 1

so circumference is 10 cm .
2 divisions<pints> is the radius .
thats it :)

Answer 2

Verrrry interesting question, your Highness.

If you measure between the ends of any diameter, then half of the circle is on
one side of those points, and half of it is on the other side of them. You are
measuring the effective resistance of 2 halves of the resistance, in parallel. So
the effective resistance is 1/4 of the conductor's total resistance . . . 2.5 ohms.