PH 316 Laundry List for Final Exam
Final Version 11/9/00
Given : (the almost-Maxwell equations [AME]), div D =
rho, div B = 0, curl E = -dB/dt, and curl H = J
- write down the expression for the flux of a vector V
- write down the divergence theorem (which has to do with
the flux of a vector V)
- write down the expression for the circulation of a vector
V
- write down Stokes' theorem (which has to do with the
circulation of a vector V)
- write down the continuity equation (which has to do with
the conservation of charge)
- identify the origin of each of the AME (coulomb's law,
gauss's law, etc.)
- write downs the full set of Maxwell equations
- show that the AME are not consistent with the equation
of continuity
- Show that the full set of Maxwell equations are consistent
with the equation of continuity
- Start from the integral of E dot J over a volume,
and derive poynting's theorem. Identify the meaning of each term in Poynting's
theorem.
- show that Eo exp( i k dot r - iwt) represents a travelling
plane wave
- show that the travelling plane wave above satisfies the
free-space wave equation
- from Maxwell's equations
- derive the free-space wave equation for the electric
field
- show for a travelling plane wave in E that E is perpendicular
to k the propagation vector
- show for a travelling plane wave in B that B is perpendicular
to k the propagation vector
- show for travelling E and B plane waves that E is perpendicular
to B
- show for travelling E and B plane waves that E and B
are in phase
- show for travelling E or B plane waves that v = omega/k
- show for travelling E and B plane waves that E x B lies
in the direction of k
- show that k in a medium = 2 pi n/lambda, where lambda
is the vacuum wavelength and n is the index of refraction in the medium
- For plane waves incident obliquely on a plane boundary
between dielectric materials, reason carefully from from the constancy
of the phase at the boundary (and using a labelled, intelligible diagram)
that
- angle of incidence = angle of reflection
- snell's law holds: n1 sin theta1 = n2 sin theta 2
- identify the four boundary conditions to be satisfied
by the field vectors at the interface of two dielectric, non-magnetic materials.
Be able to derive two of these from Maxwell's equations.
- show the reflected plane-wave E field at normal incidence
from n1 to n2 is inverted when n2>n1 and not when n2<n1
- for even or odd slab waveguide modes, draw a clear diagram
and work out the condition to be satisfied by the x-component of the propagation
vector at x=+a. This must show exactly how the boundary conditions are
brought into play.
- problems from exams 1 and 2
- given static E, calculate V, or given static V
calculate E
- problems with a charge in the presence of a conducting
sphere or grounded conducting plane or both
- problems involving gauss's law (spherical, plane, or
cylindrical geometry)
- problems involving linear dielectrics (calculate D,
E, P, V)
- near a sphere, or between spherical shells
- between conducting plates in one or more layers
- in a finite layer between (maybe partially filling )
the space between coaxial infinitely long conducting cylinders
- derive the electric field near a 'point' electric dipole
from V(dipole) = k p dot r/r^3
- no calculations with Biot-Savart law or Ampere's
law
- no problems involving a charge near an infinite
plane boundary between two dielectric media (images with dielectrics)