- #1
darkcrystal
- 4
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Hello,
I am in the middle of revising topics for the materials section of myend of year exam. For some reason my department give out past papers but do not give out answers.
Any answers to any of the follwing questions would be very helpful. I don't think too much detail is required just a basic knowledge.
1. Explain why in principle sufficient compreesion can turn an insulator into a metal?
2. In addition to heating describe another process which can excite an electron from the valence band to the conduction band?
3. Calculate the minimum energy a phton must have to produce an electron hole pait in an extrinsic semiconductor of band gap 0.6eV.
4. State the assumptions associated with the model used to develop the Ideal Gas law.
5. State what physical conditions fulfil the assumptions described in q4.
6. A gas container has an initial volume of 22.4 litres, the pressure is one atm and the temp is 273 deg K. If 0.3 mole of gas is released and the volume remains inchaned calculate the new pressure?
Thanks in advance
Dan
I am in the middle of revising topics for the materials section of myend of year exam. For some reason my department give out past papers but do not give out answers.
Any answers to any of the follwing questions would be very helpful. I don't think too much detail is required just a basic knowledge.
1. Explain why in principle sufficient compreesion can turn an insulator into a metal?
2. In addition to heating describe another process which can excite an electron from the valence band to the conduction band?
3. Calculate the minimum energy a phton must have to produce an electron hole pait in an extrinsic semiconductor of band gap 0.6eV.
4. State the assumptions associated with the model used to develop the Ideal Gas law.
5. State what physical conditions fulfil the assumptions described in q4.
6. A gas container has an initial volume of 22.4 litres, the pressure is one atm and the temp is 273 deg K. If 0.3 mole of gas is released and the volume remains inchaned calculate the new pressure?
Thanks in advance
Dan