TS EAMCET Medical 8 May 2019 Shift 1 Paper

A uniform circular disk of radius R is used as a simple pendulum when suspended from a point. The time period is T1 if the disk is suspended from a point on its rim. However the time period is T2 if the disk is suspended from a pivot point at r = αR from the center, where 0 < α < 1. If T1 = T2, then the value of α is