Chapter 29
Serway & Jewett
Ch. 29
1
B-field from magnet
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E-field from pt charge
2
Electric dipole
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Magnetic dipole
3
Repel
Attract
Attract
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Repel
4
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5
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6
Magnetic Force on positive and negative charges
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7
Right-hand rule for
vector cross products



a b  c
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8
Assume the pictured electron beam initially moves in the vertical
direction and then bends to the right in the plane of the picture.
Which ways does B point?
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9
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10
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11
090104
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12
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13
Table 29-1, p.899
Exotic astrophysical phenomena may be addressed with
future multi-Petawatt lasers
The minimal requirements for photon-bubble instability could potentially
be met with a properly configured 10 ps PetaWatt laser experiment.
HEDP Task Force
Neutron Star
Te ~ 10 keV
Trad ~ 10 keV
B ~ 10 Gigagauss
@ n ~ 10-1-10-3 g/cm3
B ~ 106 T
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PetaWatt Laser
Te ~ 1 keV
Trad ~ 1 keV
B ~ 100 Megagauss
@ n ~ 10 g/cm3
B ~ 104 T
14
Active Figure 29.19
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(SLIDESHOW MODE ONLY)
15
Active Figure 29.23
v=E/B
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(SLIDESHOW MODE ONLY)
16
Quick Quiz 29.10a
Three types of particles enter a mass spectrometer like the one shown
in your book as Figure 29.24. The figure below shows where the
particles strike the detector array. Rank the particles that arrive at a,
b, and c by speed.
(a) a, b, c
(c) c, b, a
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(b) b, c, a
(d) All their speeds are equal.
17
Quick Quiz 29.10b
Rank the particles that arrive at a, b, and c by m/q ratio.
(a) a, b, c
(b) b, c, a
(c) c, b, a
(d) All their m/q ratios are equal.
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18
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19
Fig 29-7, p.901
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20
Fig 29-8, p.901
Quick Quiz 29.4
The four wires shown below all carry the same current from point A to
point B through the same magnetic field. In all four parts of the figure, the
points A and B are 10 cm apart. Rank these situations according to the
magnitude of the magnetic
force exerted on the wires,
from greatest to least?
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21
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22
Fig 29-10b, p.902
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23
Fig 29-13a, p.904
Torque
=rF
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24
Fig 29-13, p.904
Magnetic Moment
Perpendicular to the surface!
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25
Fig 29-15, p.905
Hall Effect
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26
Fig P29-48, p.922
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27
Fig P29-53, p.922