The __________ in a magnetic field is called magnetic lines of force.
A
Open curves
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B
Closed curves
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C
Circles
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D
Polygons
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Solution
The correct option is A Closed curves The closed curves in a magnetic field is called the magnetic lines of force.
Outside the magnets, the field lines emerge from north pole and merge at
the south pole.
Inside the magnet, the direction of field lines is from its south pole to its
north pole. Thus the magnetic field lines are closed curves.