Magnetic Properties of Materials | Old is Gold | XII

Short Questions

1.  What are magnetic domains?
2.  What is angle of dip? How does it vary from the equator to the poles/
3.  Define angle of dip and angle of declination at a place.
4.  How does dip vary from place to place on earth`s surface?
5.  Why does a bar magnet not retain its magnetism when it is method?
6.  Why does a magnet lose its magnetism when heated to high temperature?
7.  Above Curie temperature a ferromagnetic material becomes paramagnetic. Why?
8.  What are the characteristics of a Ferro-magnetic substance?
9.  A permanent magnet can be used to pick up a string of nails, tacks or paper clips, even though these are not magnets by themselves. How can this be?
10.  A ferromagnetic substance becomes paramagnetic above Curie temperature. Explain why?

Long Questions

1.  The angle of dip in Britain is greater than that in Kathmandu. Why?

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