Question
A magnetic needle has a magnetic moment of 5×10-2 Am2 and moment of inertia 8×10-6 kgm2. It has a period of oscillation of 2s in a magnetic field \(\vec{B}\) . The magnitude of the magnetic field is approximately;
A magnetic needle has a magnetic moment of 5×10-2 Am2 and moment of inertia 8×10-6 kgm2. It has a period of oscillation of 2s in a magnetic field \(\vec{B}\) . The magnitude of the magnetic field is approximately;