explain the difference between a magnet and an ordinary piece of iron on the basis of the molecular theory of magnetism
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Answers
Explanation:
William Gilbert also experimented on bar magnets and found the following properties:
A magnet will always have two poles which we call arbitrarily North and South. I the magnet is broken in two this will create two new magnets with North (N) and South (S) poles. If a bar magnet is broken in two, at the fracture new north and south poles are formed at the point of fracture.
The domain theory states that inside a magnet there are small regions in which the magnetic direction of all the atoms are aligned in the same directions. These regions are known as domains.
Within a domain, the aligment of the magnetic direction is the same. In the next domain it may be in a completely different direction. On average over the many domains in the magnet there there is no preferential direction for the magnetic force. However, using an external magnetic field from another magnet say, the direction of the magnetic direction in each domain can be made to align with the
properties of magnets
Properties of Magnets
Like poles repel each other. If a N pole is brought close to the N pole of a second magnet a repulsive force will be felt. Similarly if a S pole is brought close to the S pole of another magnet, the two magnets will repel each other.
Unlike poles attract and will stick together.
Magnets attract iron rich materials and like poles and the repulsion between like poles can be reduced if a strip of iron is placed between them.
Difference between a magnet and an ordinary piece of iron:
Explanation:
- Iron is attractive in its α structure. The α structure happens under an extraordinary temperature called the Curie point, which is 770 °C.
- Iron is paramagnetic over this temperature and simply feebly drawn to an attractive field. Attractive materials comprise of molecules with to some degree filled electron shells.
- The principle contrast between hard iron and delicate iron is that difficult iron can't be demagnetized whenever it is charged though delicate iron can be demagnetized whenever it is polarized.
- Magnets and iron draw in one another yet can't repulse one another. At full contact, the fascination among magnet and iron is equivalent to the fascination between two equivalent magnets.