-
浙江大学
2004-2005
学年冬季学期
《
Physics
（Ⅱ）
》课程
期末考试
试卷
开课学院：理学院
考试形式：闭卷，允许带非存储计算器、纸质词典入场
考试时间
:2005
年
1
月
21
日
所需时间
120
分钟
姓名
_______
专业
学号
组号
任课教师
题
序
得
分
评卷人
一
二
三
四
五
六
七
八
总分
Planck constant
h
=6.63
?
10
-34
J
?
s
Charge of an electron
e
=1.6
?
10
-19
C
Permittivity constant
?
0
=8.85
?
10
-12
C
2
/(N
?
m
2
)
Electronic volt
1eV=1.6
?
10
-19
J
Permeability constant
?
0
=4
?
?
10
-7
H/m
Mass of an electron
m
e
=9.11
?
10
-31
kg
Ⅰ
. Multiple choices (there is one correct answer only):
1. The
electric charge on a conductor is
A.
Uniformly distributed throughout the volume.
B.
Confined to the surface and is uniformly distributed.
C.
Mostly on the outer surface, but is not uniformly distributed.
D.
Entirely on the surface and is distributed according to the shape of the object.
E.
Distributed throughout the volume of the object and distributed according to
the
object
’
s shape.
2.* You are given a closed circuit with
radii
a
and
b
, as shown in the Fig. , carrying
current
i
. The magnetic dipole moment of the circuit is:
(
a
2
?
b
2
)
A.
i
?
.
4
B.
i
?
(
a
2
?
b
2
)
(
a
2
?
b
2
)
C.
i
?
.
2
D.
i
?
(
a
?
b
)
.
.
Page 1 of 7
3. A parallel plate capacitor is
attached to a battery that supplies a constant
potential
difference.
While
the
battery
is
still
attached,
the
parallel
plates
are
separated
a
little more. Which statement describes
what happens?
.
A. The electric field increases and the charge on the plates increases.
B. The
electric field remains constant and the charge on
the plates increases.
C. The
electric field remains constant and the charge on
the plates decreases.
the
electric field and the charge on the plate
decreases.
4.
A
wire
carries
current
as
shown
in
the
Fig.
Point
charge
1
and
4
move
in
the
directions indicated. If the
magnetic forces on charges 1
and 4 are
equal and their velocities are equal,
A. The charges have the same
sign and
q
1
?
q
4
.
B. The charges have opposite
sign and
q
1
?
q
4
.
C. The charges have the same sign and
q
1
?
q
4
.
D.
The charges have opposite sign and
q
1
?
q
4
.
5.
Displacement
current
exists
in
the
region
between
the
plates
of
a
parallel
plate
capacitor if:
A.
the capacitor leaks(
泄漏
) charge across the plates
B.
the capacitor is being discharged
C.
the capacitor is fully charged
D.
the capacitor is fully discharged
E.
none of the above are true
6. The intensity pattern as shown in
Fig. is due to.
A.
two slits
B.
a single slit
C.
a grating
D.
a circular aperture
E.
none of above
7. The Fermi
energy of copper at
0K represents
A
.
the average energy of the electrons
.
B. the
energy necessary to remove an electron from the
surface.
maximum energy of any
electron.
D. the minimum energy of any
electron.
Page
2 of 7
8.
How many of Oxygen’s
eight electrons are found in the
p
state?
A.
0
B.
2
C.
4
D.
6
E.
8
9. In the Compton effect, a photon of
wavelength
λ
and frequency
f
is scattered from
an
electron, initially at rest. In this process,
A.
the
electron
gains
energy
from
the
photon
so
that
the
scattered
photon
’
s
wavelength is less than
λ
.
B. the electron gives energy to the scattered photon so that the photon
’
s frequency
is
greater than
f
.
C.
momentum is not conserved, but energy is
conserved.
D. the photon loses energy
so that the scattered photon has a frequency less
than
f
.
10.
Specify which of the following types of materials
might satisfy this description: a
filled valence band, an empty
conduction band, an energy gap of 0.5eV
.
A. Conductor
B. Insulator
C. Semiconductor
D. None of
above
Page 3 of 7