Because it wouldn't make sense. Two intersecting lines of force - in this case, magnetic lines of force - would mean that at the point of the intersection, the force felt by a small test magnet would be in two different directions.
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because they are solid lines and they do not have space to be combining. Also the magnetic can stay together but not melt to being a diffusion (not liquid)
As we know equipotential surface means there is no potential difference that is no work is done on surface.so lines of force must intersect surface at right angles to satisfy this statement,so that net work is zero.
No. If they did, that would mean that at the point of intersection, the force field points in two different directions simultaneously!
Magnetism is a force. Vector notation is required to indicate magnitude and direction of a force.
Beats me. But since there ARE no magnetic lines of force, don't worry about it.