Question

what is magnetic field lines?​

Answer 1

magnetic magnetic field line is a usual tool used to represent magnetic field . they describe the direction of the magnetic field on the north monopole at any given position

Answer 2

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A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetized materials. A charge that is moving in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field