A loop formed by three identical uniform conducting rods each of length a = 20 cm is suspended from one of its vertices (P) so that it can rotate about horizontal fixed smooth axis CD. Initially plane of loop is in vertical plane. A constant current i = 10A is flowing in the loop. Total mass of the loop is m = 60gm.  At t = 0, a uniform magnetic field of strength B directed vertically upwards is switched on. If the minimum value of B (in mT) is n, so that the plane of the loop becomes horizontal (even for an instant) during its subsequent motion. Then value of n/100 is  (Assume current in the loop is maintained constant).