Download Serway_PSE_test_ch29

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1.5 mT
6.6 mT
5.9 mT
1.3 mT
4.1 mT
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A 6.0-C charge moves with a velocity of (2.0i + 4.0j + 6.0k) m/s and
experiences a magnetic force of (4.0i - 20j + 12k) N. The x
component of the magnetic field is equal to zero. Determine the y
component of the magnetic field.
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+ 1.0 T
- 1.0 T
+ 5.0 T
- 5.0 T
- 6.0 T
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A positively charged particle has a velocity in the positive z
direction at point P. The magnetic force on the particle at this point
is in the positive y direction. Which one of the following statements
about the magnetic field at point P can be determined from this
data?
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A charged particle (mass = M, charge = Q > 0) moves in a region of
space where the magnetic field has a constant magnitude of B and
a upward direction. What is the magnetic force on the particle at an
instant when it is moving horizontally toward the west with speed
V?
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QVB toward the north
QVB toward the east
Zero
QVB downward
QVB toward the south
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A 2.0-m wire carries a current of 35 A directed along the
positive x axis in a region where the magnetic field is
uniform and given by B = (30i - 70j) mT. What is the
resulting magnetic force on the wire?
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(- 4.9 k) N
(+ 4.9 k) N
(- 9.8 k) N
(+ 9.8 k) N
(+ 0.80 k) N
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A segment of wire carries a current of 26 A along the x axis from x =
- 1.0 m to x = 0 and then along the y axis from y = 0 to y = 2.0 m. In
this region of space, the magnetic field is equal to 30 mT in the
positive z direction. What is the magnitude of the force on this
segment of wire?
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1.7 N
8.3 N
2.7 N
6.2 N
9.3 N
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25 mT
65 mT
57 mT
33 mT
62 mT
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34 A
49 A
71 A
72 A
87 A
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0.53 N
0.76 N
0.75 N
0.32 N
0.50 N
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0.60 T
0.71 T
1.8 T
1.9 T
2.1 T
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36 mm
26 mm
57 mm
28 mm
7.7 mm
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A 900-eV electron and a 400-eV electron trapped in a
uniform magnetic field move in circular paths in a plane
perpendicular to the magnetic field. What is the ratio of
the radii of their orbits?
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1.5
2.2
2.4
4.2
2.0
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36 km
77 km
91 km
71 km
3.2 km
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A charged particle moves in a region of uniform
magnetic field along a helical path (radius = 4.0 cm,
pitch = 19 cm, period = 5.0 ms). What is the speed of
this particle as it moves along this path?
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63 m/s
69 m/s
29 m/s
20 m/s
60 m/s
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Two single charged ions moving perpendicularly to a uniform
magnetic field (B = 0.5 T) with speeds of 5,000 km/s follow circular
paths that differ in diameter by 6.0 cm. What is the difference in the
mass of these two ions?
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What is the radius of curvature of the path
of a 1.0-keV proton in a perpendicular
magnetic field of magnitude 0.90 T?
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5.
5.1 mm
3.9 mm
1.9 cm
1.5 cm
1.6 cm
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2.4 mm
5.8 mm
5.4 mm
5.6 mm
11 mm
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A proton with a kinetic energy of 0.30 keV follows a
circular path in a region where the magnetic field is
uniform and has a magnitude of 50 mT. What is the
radius of this path?
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5.0 cm
4.1 cm
7.2 cm
6.6 cm
3.5 cm
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A proton is accelerated from rest through a potential
difference of 6.5 kV and then moves perpendicularly
through a uniform 0.40-T magnetic field. What is the
radius of the resulting path?
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29 mm
20 mm
82 mm
47 mm
2.2 mm
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What is the kinetic energy of an electron that passes
undeflected through perpendicular electric and
magnetic fields if E = 4.0 kV/m and B = 8.0 mT?
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5.
0.71 eV
0.81 eV
0.92 eV
0.38 eV
1.7 eV
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A velocity selector uses a fixed electric field of magnitude E and the
magnetic field is varied to select particles of various energies. If a magnetic
field of magnitude B is used to select a particle of a certain energy and
mass, what magnitude of magnetic field is needed to select a particle of
equal mass but three times the energy?
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0.58 B
0.33 B
3.0 B
1.7 B
2.4 B
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is in opposite directions in electric
and magnetic fields
is in the same direction in electric
and magnetic fields
is parallel to a magnetic field and
perpendicular to an electric field
is parallel to an electric field and
perpendicular to a magnetic field
is zero in both if the charge is not
moving
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20% 20% 20% 20% 20%
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3.
4.
A net force to the left.
A net force to the right.
A net force upwards.
No net force but a slight shift of the inner
conductor to the right and the outer
conductor to the left.
No net force but a slight shift of the inner
conductor to the left and the outer conductor
to the right.
5.
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The north-pole end of a bar magnet is
held near a positively charged piece of
plastic. The plastic is _____.
1. attracted
2. repelled
3. unaffected by the
magnet
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An electron moves in the plane of this paper toward the
top of the page. A magnetic field is also in the plane of
the page and directed toward the right. The direction of
the magnetic force on the electron is _____.
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5.
6.
toward the top of the page
toward the bottom of the
page
toward the left edge of the
page
toward the right edge of
the page
upward out of the page
downward into the page
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A wire carries current in the plane of this paper toward
the top of the page. The wire experiences a magnetic
force toward the right edge of the page. The direction of
the magnetic field causing this force is _____.
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2.
3.
4.
in the plane of the page
and toward the left edge
in the plane of the page
and toward the bottom
edge
upward out of the page
downward into the page
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1. smaller
2. larger
3. equal in size
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33%
2
33%
14
15
16
17
18
319
20
34
35
36
37
38
39
40