Homework Answers
A) as the higher energy level of the band is filled partially with electron when the electric field is applied we have free electrons which can move in the presence of electric field
so the material behaves as the conductor
the material acts like sodium which acts as a conductor on the application of electric field.
B) If all the electrons are removed from the conductor, then there will be no free electrons to conduct electricity and this it behaves as an INSULATOR. During the removal of electrons , oxidation process takes place in it because oxidation is nothing but removal if electrons.
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15. A compound has the following band diagram, with the shading representing occupancy by electrons: The...
A solid material has the band structure in the following figure, with the purple areas representing...
A solid material has the band structure in the following figure,
with the purple areas representing regions occupied by electrons.
The lower band is completely occupied by electrons, and the upper
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A solid material has the band structure in the following figure,
with the purple areas representing regions occupied by electrons.
The lower band is completely occupied by electrons, and the upper
level is about one-third filled with electrons.
E(k)t Er K. 4. (Advanced Level) Graphene is a special type of material which is two- dimensional and has a linear E-k diagram. The conduction and valence bands touch each other at a singularity, known as the Dirac point. In the unexcited state, the valence band is completely filled, while the conduction band is completely empty From the E-k diagram shown above, deduce the equation of the E-k curve. Hence, from the equation you deduced, speculate the special properties of...
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