Question

A magnetic needle placed in uniform
magnetic field has magnetic moment of
2 x 10-2 A m², and moment of inertia of
7.2 x 10-7 kg m². It performs 10 complete
oscillations in 6 s. What is the magnitude
of the magnetic field ?
[Ans: 39.48 x 10-4 Wb/m?]​

Answer 1

Answer:

magnetic needle placed in uniform

magnetic field has magnetic moment of

2 x 10-2 A m², and moment of inertia of

7.2 x 10-7 kg m². It performs 10 complete

oscillations in 6 s. What is the magnitude

of the magnetic field ?