4. A thin bar magnet is suspended by a string attached to its midpoint. Themagnetic charge at the pole face markedN is 5x10 Cm/s, and the magneticcharge on the pole face marked S is -5x10 Cm/s. The ends are separated by adistance of 20 cm. What is the magnetic dipole moment m of the bar magnet?If the Earth's magnetic field at this location has a strength of 0.5 Gauss in anorth/south direction, what is the torque exerted on the bar magnet if m pointsnortheast/southwest?

Concept used: A torque acts on a magnetic dipole placed in uniform magnetic field. Angle between…

Answered: 4. A thin bar magnet is suspended by a…

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