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Magnetic Field lines move from _______
A) North to south
B) South to north
C) West to east
D) East to west
North to south
Outside a magnet or in free space, magnetic field lines continuously emerge from the North pole and enter into the South pole. Internally within the magnet, the field lines complete a continuous loop by traveling from South to North, forming closed, non-intersecting paths.
Outside a magnet or in free space, magnetic field lines continuously emerge from the North pole and enter into the South pole. Internally within the magnet, the field lines complete a continuous loop by traveling from South to North, forming closed, non-intersecting paths.
тИЗтЛЕB=0 тАФ Gauss's Law for Magnetism (no magnetic monopoles exist)
╬ж=тИмBтЛЕdA тАФ Magnetic flux through a surface
Magnetic field lines follow the direction of the magnetic force exerted on a hypothetical isolated North magnetic pole. Since like poles repel and opposite poles attract, a test North pole is repelled away from the North pole and attracted toward the South pole outside the magnet.
Outside a bar magnet, magnetic field lines travel from North pole to South pole.
Inside a bar magnet, magnetic field lines travel from South pole to North pole to form closed loops.
Magnetic field lines never intersect each other at any point.
The density of field lines represents the strength of the magnetic field (magnetic flux density B).
Determining field direction in electrical machines like DC motors and transformers.
Mapping flux distribution in magnetic circuits and magnetic core design.
Option B (South to north) represents the internal direction of magnetic field lines inside the magnet.
Options C and D describe spatial directions unrelated to magnetic polarities.
A is correct тАФ Outside a magnet, magnetic field lines always originate from the North pole and terminate at the South pole.
Always pay attention to whether an exam question asks for external field direction (North to South) or internal field direction (South to North)!