Review Session
I.
II.
III.
Superconductors –
A.
Resistance is zero,
B.
current will continue until work is done
C.
magnetic field is 0 inside the superconductor
1.
acts as magnet that opposes magnetic field
D.
power needed is zero once superconductor has initial current
E.
things that destroy superconductor
1.
excessive temperature/heat
2.
excessive external field
3.
excessive current density
IV.
R
B
T
T
A.
Magnetic moment
1.
low energy state is when magnetic fields are aligned
2.
high energy state is when the magnetic field is antiparallel
3.
particles can be flipped from aligned to not aligned by sending in a photon
4.
particles can be flipped from not aligned to aligned by emitting in a photon
5.
μ (magnetic moment) ≠ μ
0
(fundamental constant)
6.
Start all nuclear magnetic resonance problems with E
ph
= ΔE
hf = 2μB
a.
resonant frequency is the f that solves this
V.
E
ph
= ΔE
VI.
ψ> = aA> + bB>
A.
complex exponential – e

i
Et/ħ
B.
Prob{A>} = a e

i
Et/ħ

2
C.
Prob{φ>} = <φψ>
2
D.
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 Spring '08
 Ladd
 Particle Physics, Current, Resistance, Power, Work, Photon, Quark, Quantum chromodynamics, particles A. boson

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