Invisible lines representing the magnetic fields around magnetic objects, indicating direction and intensity of magnetic force.

चुंबकीय बल रेखाएं

English Usage: "The magnetic lines of force emanate from the north pole and curve around to the south pole."

Hindi Usage: "चुंबकीय बल रेखाएं उत्तर ध्रुव से निकलकर दक्षिण ध्रुव तक फैलती हैं।"