Static torsion

Here we determine the rigidity modulus of the material of the given rod using Searle’s static torsion apparatus. This apparatus consists of a stout metal frame with a cylindrical rod arranged horizontally, the end of which is firmly fixed to a frame. The other end is tightly held by a chuck at the edge of a smooth pulley. One end of the tape is fixed on the rim point with winding over pulley through the groove. A weight hanger is designed at the free end of the tape. Twist produced on the rod is measured using a scale and telescope arrangement.