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Two bar magnets having same geometry with magnetic moments M and 2M, are firstly placed in such a way what their similar poles are same side then its time period of oscillation is `T_1`. Now the polarity of one of the magnet is reversed then time period of oscillation will be:-A. `T_1 lt T_2`B. `T_1=T_2`C. `T_1 gt T_2`D. `T_2=oo` |
Answer» Correct Answer - A `T=2pisqrt(1/"MB")rArr T prop 1/sqrtM` case I:`M_1=2M+M` Case II: `M_2=2M-M` `T_1/T_2 =sqrt(M/(3M))=1/sqrt3rArr T_2=sqrt3T_1` |
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