In a uniform magnetic field of 0.049 T, a magnetic needle performs 20 complete oscillations in 5.... VIDEO
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 9.8×10-6 kg m2. If the magnitude of magnetic moment of the needle is x×10-5Am2 : then the value of ' x ' is :
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