Question:
In a uniform magnetic field of 0.049 T, a magnetic needle performs 20 complete oscillations in 5 seconds as
shown. The moment of inertia of the needle is

If the magnitude of magnetic moment of the needle is

 then the value of ‘x’ is : 

                                                                                                                                               NEET-2024
Solution:                
In a uniform magnetic field of 0.049 T, a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is

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