1) What three factors does the resistance of a length of wire depend on?
R=pL/A so resistivity, length and cross sectional area.
2) Describe the structure of a typical metal.
Positive ions in a crystalline lattice with a sea of delocalised electrons.
3) Define amorphous and give an example of an amorphous material.
A material with no overall pattern in structure and the atoms are arranged in random, glass is an amorphous material.
4) What is plastic deformation.
When permanent deformation of a material occurs.
5) State Hooke's law.
F=ke, where F is the force, k is stiffness constant and e is the extension
Hey do you have the Jan 2012 paper?