Question

The length of a magnet is very large as compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is 2 s. The magnetic is cut perpendicular to its length in to three equal parts and three parts are then placed on each other with their like poles together. The time period of this combination will be (1) 2 s(2) 2/3 s (3)2\sqrt3s (4)2/\sqrt[{}]3

Answer 1