DoITPoMS

Questions

Quick questions

You should be able to answer these questions without too much difficulty after studying this TLP. If not, then you should go through it again!

1. Which picture best describes ferromagnetism?

   	a
   	b
   	c
   	d

2. Which 3 elements are ferromagnetic at room temperature?

   	a	Mn, Cr, Fe
   	b	Mg, Ti, Ni
   	c	Fe, Ni, Co
   	d	Co, Ce, Mn

3. What happens to ferromagnetic materials above the Curie Temperature?

   	a	They become diamagnetic
   	b	They become gases
   	c	They become antiferromagnetic
   	d	They become paramagnetic

4. What is the main driving force for the formation of domains?

   	a	Magnetostatic energy
   	b	Magnetocrystalline energy
   	c	Magnetostrictive energy
   	d	All of the above