Correct answers are underlined
[<br>]
The de Broglie wavelength of a free electron of kinetic energy 10 eV is:
A. 3.9×10
11
m
B. 1.3×10
10
m
C. 1.3×10
9
m
D.
3.9×10
10
m
[<br>]
Ψ
(
x
) is the wave function of a particle moving along the
x
axis. The probability to find it in the
interval [
a
,
b
] is:
A.
( )
( )
2
a
a
b
Ψ

B.
( )
( )
2
b
a
b
Ψ

C.
( )
2
b
a
x
dx
Ψ
∫
D.
( )
2
b
a
x dx
Ψ
∫
[<br>]
A particle in a 1d box is in the state of energy
E
3
. What is the probability to find it in the interval [0,
a
/3]?
A. 1/2
B. 1/4
C. 1/6
D.
1/3
[<br>]
The ground level of a particle in a 1d box is 2.0 eV. If the box width is doubled its ground level will
be:
A.
0.5 eV
B. 1.0 eV
C. 2.0 eV
D. 4.0 eV
[<br>]
Choose the
correct
statement for a quantum particle.
A. Its position and momentum can both be measured with great accuracies.
B. Its position and energy cannot both be measured with great accuracies.
C. Its position and energy can both be measured with great accuracies.
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 Spring '08
 Kim
 Electron, Electromagnet, Electronic band structure, a. silicon, B. Silicon

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