Which of the following statements is true reg | vedclass

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(B) Magnetic lines of force are imaginary lines in a magnetic field that represent the path along which a hypothetical unit north pole would move. $1$

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Are always closed

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(B) Magnetic lines of force are imaginary lines in a magnetic field that represent the path along which a hypothetical unit north pole would move. $1$. They can never intersect because if they did,the north pole would have two directions to move simultaneously at the intersection point,which is physically impossible. $2$. Magnetic monopoles do not exist; magnetic field lines always form continuous closed loops,starting from the north pole and ending at the south pole outside the magnet,and continuing from south to north inside the magnet. $3$. The density of these lines indicates the strength of the magnetic field. They are crowded where the field is strong (near the poles) and spread out where the field is weak (far from the poles). $4$. Magnetic field lines can easily pass through a vacuum,as magnetic fields do not require a material medium to propagate. Therefore,the correct statement is that they are always closed loops.

Which of the following statements is true regarding magnetic lines of force?

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