Q: The length, breadth and mass of two bar magnets are same but their magnetic moments are 3 M and 2 M respectively. These are joined pole to pole and are suspended by a string. When oscillated in a magnetic field of strength B, the time period obtained is 5 s. If the poles of either of the magnets are reversed, then the time period of the combination in the same magnetic field will be
(a) 2√2 s
(b) 5√5 s
(c) 1 s
(d) 3√3 s
Joining pole to pole means sum position, for which T1 = 5 s.
If T2 is time period for difference position, then