- What are magnetic domains?
- What is angle of dip? How does it vary from the equator to the poles/
- Define angle of dip and angle of declination at a place.
- How does dip vary from place to place on earth`s surface?
- Why does a bar magnet not retain its magnetism when it is method?
- Why does a magnet lose its magnetism when heated to high temperature?
- Above Curie temperature a ferromagnetic material becomes paramagnetic. Why?
- What are the characteristics of a Ferro-magnetic substance?
- 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?
- A ferromagnetic substance becomes paramagnetic above Curie temperature. Explain why?
- The angle of dip in Britain is greater than that in Kathmandu. Why?