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 9.8 \times 10^{-6} {\kg} {\m}^2. If the magnitude of magnetic moment of the needle is x \times 10^{-5} {\Am}^2, then the value of ' x ' is : [NEET 2024]

Class 12 NEET Physics Magnetism and Matter Questions

Section: Physics

Question : 5 of 50

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In a uniform magnetic field of 0.049T, a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is 9.8×10−6‌kg‌m2. If the magnitude of magnetic moment of the needle is x×10−5Am2, then the value of ' x ' is :

[NEET 2024]

5π2
128π2
50π2
1280π2

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