In a uniform magnetic field, the magnetic needle has a magnetic moment 9.85 10^ -2 A/m^2 and moment of...

Question

In a uniform magnetic field, the magnetic needle has a magnetic moment 9.85 10^ -2 A/m^2 and moment of inertia 5 10^ -6 kg m^2. If it performs 10 complete oscillations in 5 seconds then the magnitude of the magnetic field is________mT. [Take ^2 as 9.85]

Accepted Answer

8

JEE Main 2021 Physics question

Solution