when one refrigerator magnet is placed upon the other then they either slide easily or somewhat there is disturbance when they slide. BUt when the magnet on the top is rotated in 90 degree sidewise then when we again slide it, there is exactly opposite to what has happened before. If they slided easily before now they slide with some difficulty and vice versa.Why does this happen?explain the orientation of magnetic field or magnetic poles
Truth be told it is hard to determine. There is no such thing as a clear line between what defines an orientation, preference, fetish, etc. They all fall on scales that vary wildly and each is formed by an amalgamation of our genetics, our environment, and our own choices. Some people might find a particular fetish as difficult to alter as their gender preference others might find that they change what they like on a weekly basis. I have even met bisexuals who at one point cannot stand the thought of one gender and the next day switch altogether. It's just phrasing and it doesn't really mean anything anyway. If you are talking about what to say in colloquial language then I would say that neither word indicates any kind of permanence more than the other. Honestly I just wouldn't let it bother you.
The flexible magnetic material used for efrigerator magnets is actually a moderately complicated material. It is composed of alternating triangular prisms of differently oriented magnetism that produce a very small magnetic field on the front side of the magnet, and alternating stripes of north and south polarity magnetic field on the back side. Think of the back side as a piece of corrugated cardboard, with the bumps being one magnetic polarity (say north) while the valleys are the other polarity. When two refrigerator magnets are put back-to-back, the magnetic stripes on each magnet can either be oriented parallel to one another, or at right angles to one another. When they are parallel, sliding the magnets past one another is line trying to slide two pieces of corrugated cardboard past one another in a direction perpendicular to the corrugations -- the cardboard (magnets) stick when a protrusion/bump (the north pole) on one side is aligned with a hollow (the south pole) on the other side, and when a bump (north) is aligned with a bump (north) on the other side, the pieces want to snap back to a situation where the bumps and hollows (north and south poles) are aligned. If the cardboard or magnets are oriented so that the corrugations or magnetic stripes are at 90 degrees to one annother, they slide without sticking or repelling because every bump-hollow (north-south) intersection can be paired with a bump-bump (north-north) or hollow-hollow (south-south) intersection, so there is no net attractive or repulsive force. If this is hard for you to visualize, see the source cited below, which has a good description of the magnetic structure of the material used in refrigerator magnets, and discusses the phenomenon you are asking about.
