MSE 302 Electronic Materials
Quiz 5: open book & notes; choose the best single answer
November 12, 2013
NAME_
1.
High values of capacitance can be obtained using materials with the following characteristics EXCEPT:
a. Thick layers
b. High relative permitt
HOMEWORK3solutions
MSE302
Fall2013
1.22 BCC and FCC crystals
a. Since molybdenum has BCC crystal structure, there are 2 atoms in the unit cell. The density is
that is,
Mass of atoms in unit cell
Volume of unit cell
M
2 at
N
3A
a
Number of atoms in unit c
HOMEWORK4
MSE302
Fall2013
HomeworkproblemforLesson4:
Kasap1.30
_
1.30 Vacancies in silicon
Equilibrium concentration of vacancies is
E
n N exp
kT
Vacancy formation energy Ev = 3.6 eV (1.610-19 J eV-1) = 5.7610-19 J. The equilibrium
concentration is t
HOMEWORK8
MSE302
Fall2013
HomeworkproblemforLesson8:
Kasap3.14
3.14 Heisenberg's uncertainty principle
The emitted wavelength is = 589 nm and the transition time is t = 20 ns. This time
corresponds to an uncertainty in the energy that is E. Using the unce
HOMEWORK2solutions
MSE302
Fall2013
1.8 Kinetic Molecular Theory
a. From the Kinetic molecular theory for gases, we have
N
PV
N RT
A
where, R is the gas constant constant, T is the temperature. The number of Ar atoms per unit
volume is
N PN A
n Ar
V
HOMEWORK1Solutions
MSE302
Fall2013
1.1 Virial theorem
First we consider the case when the outermost valence electron can see a net charge of +e. From
Coulombs law we have the potential energy
PE
( e)(e)
Q1Q2
40 r0
40 r0
(1.6 10 19 C) 2
= 1.354 10-18 J or
MSE 302 Electronic Materials
Quiz 6: open book & notes; choose the best single answer
November 21, 2013
NAME_
1.
A soft magnetic material used in switching applications should have:
a. High electrical conductivity
b. High magnetic permeability
c. Low satu
HOMEWORK5
MSE302
Fall2013
HomeworkproblemforLesson5:
Kasap2.2c,2.3,2.4,2.13
2.2 Electrical conduction
c. We know that 1/ = = en where is the electrical conductivity, e is the electron charge,
and is the electron drift mobility. We also know that = e / me,
HOMEWORK6
MSE302
Fall2013
HomeworkproblemforLesson6:
Kasap2.12,2.18,2.23,2.24
2.12 Electrical and thermal conductivity of Ag
a. Atomic concentration nat is
nat
dN A (10.50 103 kg m 3 )(6.022 10 23 mol1
= 5.862 1028 m-3
M at
(107.87 10 3 kg mol1 )
If we a
HOMEWORK7
MSE302
Fall2013
HomeworkproblemforLesson7:
Kasap3.1,3.7
3.1 Photons and photon flux
a. Given: power P = 1000 W and frequency = 700 103 s-1.
Then the photon energy is
Eph = h = (6.626 10-34 J s)(700 103 s-1)
Eph = 4.638 10-28 J/photon or 2.895 10
MSE 302 Electronic Materials
Quiz 1: open book & notes; choose the best single answer
September 3, 2013
NAME_
1.
The electronic structure for Rh is [Kr]4d85s1. What would you expect the electronic structure of the next
element, Pd, to be?
a. [Kr]4d10
b. [