Practice question

**Magnetic dipole moment** quantifies strength and orientation of magnet, m = 2l × q_m where q_m pole strength. Field line concept visualizes B, with closed nature reflecting absence of magnetic monopoles, explaining non-intersection and continuity. A solenoid’s field lines emerge from one end (acting as a north pole) and enter the other (acting as a south pole), mirroring a bar magnet’s dipole field pattern due to the cumulative effect of current loops behaving like a magnetic dipole. Substituting values gives It acts as a magnetic dipole, which matches expected magnitude for this magnetic configuration, confirming dipole field dependence on m/r³ and torque relation τ = m B sinθ.