A uniform ring has a radius R with centre C. A nd B are 2 pts on the circumference.such that angle theta is 60⁰.find the equivalent resistance between pt A and B?

solution) let he resistance of  whole ring i.e. 2ΠR be r.

therefore the resistance of wire between points a and b is r/6

and the reistance of rest part of ring is 5r/6

now these two resistances are in parallel combination

thus equivalent resistance will be 5r/36.