SAMPLE QUESTIONS_and_ANSWERS
... and photonic crystals. There are one-dimensional, two-dimensional and three dimensional photonic crystals. Can you think of analogous structures formed by atomic scale materials ? ...
... and photonic crystals. There are one-dimensional, two-dimensional and three dimensional photonic crystals. Can you think of analogous structures formed by atomic scale materials ? ...
chapter19_2007
... Intrinsic semiconductors are those where except for temperature there is no external factor affecting their conductivity. • Elements from Group IV-A (or 14) of the Periodic Table and some compounds. • Silicon and germanium material band gap (eV) Si ...
... Intrinsic semiconductors are those where except for temperature there is no external factor affecting their conductivity. • Elements from Group IV-A (or 14) of the Periodic Table and some compounds. • Silicon and germanium material band gap (eV) Si ...
Slide 1
... charges (electrons) • The electrons are in constant motion In fact they move very fast ~ 106 m/sec They bounce off the atoms of the lattice Ordinarily, they move in random directions Ordinarily, no net flow of charge ...
... charges (electrons) • The electrons are in constant motion In fact they move very fast ~ 106 m/sec They bounce off the atoms of the lattice Ordinarily, they move in random directions Ordinarily, no net flow of charge ...
Q. 1 – Q. 5 carry one mark each.
... the scattered wave is replaced by an appropriate plane wave, the corresponding Born approximation is known as the first Born approximation. Such an approximation is valid for (A) large incident energies and weak scattering potentials. (B) large incident energies and strong scattering potentials. (C) ...
... the scattered wave is replaced by an appropriate plane wave, the corresponding Born approximation is known as the first Born approximation. Such an approximation is valid for (A) large incident energies and weak scattering potentials. (B) large incident energies and strong scattering potentials. (C) ...
Exam 1 Solutions
... First find the equivalent capacitances for capacitors 1 and 3 to get 4C for each of them. Then add the three resulting capacitances in series to obtain, 1/Ctot = 1/4C + 1/2C + 1/4C or Ctot = C. 6. The charge neutral He atom has 2 electrons/atom. How much negative and positive charge is there (in cou ...
... First find the equivalent capacitances for capacitors 1 and 3 to get 4C for each of them. Then add the three resulting capacitances in series to obtain, 1/Ctot = 1/4C + 1/2C + 1/4C or Ctot = C. 6. The charge neutral He atom has 2 electrons/atom. How much negative and positive charge is there (in cou ...
Continuity Equation and Kirchhoff`s Current Law
... In our discussion so far we have considered field problems that are associated with static charges. In this chapter we consider the situation when the charges can be in motion and thereby constituting current flow. Due to the movement of free charges, several types of electric current can be caused: ...
... In our discussion so far we have considered field problems that are associated with static charges. In this chapter we consider the situation when the charges can be in motion and thereby constituting current flow. Due to the movement of free charges, several types of electric current can be caused: ...
18 Semiconductors
... Electrons have negative charge and move toward positive electrode; Holes have positive charge and ”move” toward negative electrode Any electron that leaves the atom creates a “hole” in the valence orbit. • The 'hole' is an abstraction; it has no substance and does not actually move itself, but movem ...
... Electrons have negative charge and move toward positive electrode; Holes have positive charge and ”move” toward negative electrode Any electron that leaves the atom creates a “hole” in the valence orbit. • The 'hole' is an abstraction; it has no substance and does not actually move itself, but movem ...
Prelab01
... All matter is made of atoms containing a nucleus of neutrons (no charge) + protons (charge = +1.6 x10-19 C) surrounded by a “cloud” of electrons (charge = -1.6 x 10-19 C). Note that the number of electrons and protons in an atom are the SAME. In solid matter, the atomic nuclei might vibrate but do ...
... All matter is made of atoms containing a nucleus of neutrons (no charge) + protons (charge = +1.6 x10-19 C) surrounded by a “cloud” of electrons (charge = -1.6 x 10-19 C). Note that the number of electrons and protons in an atom are the SAME. In solid matter, the atomic nuclei might vibrate but do ...
