A magnet attracts a piece of iron.t- the iron can then attract another peice of iron. explain,on the basis of?

a magnet attracts a piece of iron.the iron can then attract another peice of iron. explain,on the basis of alignment of domains,what happens in each piece of iron

A magnet can attract a piece of iron because when the iron experiences the magnetic field of the magnet, the force of the magnetic field makes the domains in the iron line up (that is, align.), dipolarized (north and south pole formed). Now, the iron is a temporary magnet. It does the same thing to another piece of iron, that is, aligning the domains of the iron due to force of magnetic field.

If the magnet is taken away, the random motion of the electrons in the iron will remove the induced magnetism.
Ferromagnetic materials exhibit a long-range ordering phenomenon at the atomic level which causes the unpaired electron spins to line up parallel with each other in a region called a domain. Within the domain, the magnetic field is intense, but in a bulk sample the material will usually be unmagnetized because the many domains will themselves be randomly oriented with respect to one another. Ferromagnetism manifests itself in the fact that a small externally imposed magnetic field, say from a solenoid, can cause the magnetic domains to line up with each other and the material is said to be magnetized. The driving magnetic field will then be increased by a large factor which is usually expressed as a relative permeability for the material. There are many practical applications of ferromagnetic materials, such as the electromagnet.

Ferromagnets will tend to stay magnetized to some extent after being subjected to an external magnetic field. This tendency to "remember their magnetic history" is called hysteresis. The fraction of the saturation magnetization which is retained when the driving field is removed is called the remanence of the material, and is an important factor in permanent magnets

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