Magnetism and Matter — Practice Questions

A bar magnet is placed with its north pole pointing towards geographic north. What will be the direction of the magnetic field at a point on the axial line of the magnet, far from the north pole?

Calculate the magnetic field at a point on the axial line of a short bar magnet at a distance of 0.2 m from its center. Given: magnetic dipole moment M = 8.0 A⋅m². (Use μ₀/4π = 10⁻⁷ H/m)

Which of the following statements about magnetic field lines is correct?

A magnetic dipole is placed in a uniform magnetic field B = 0.5 T. If the magnetic moment is 2.0 A⋅m² and makes an angle of 60° with the field, calculate the torque experienced by the dipole.