Topics covered on Exam 2

Chapter 21

  1. electric charge: two kinds, conserved, quantized (e is positive)
  2. like repel, unlike attract
  3. materials: conductors and insulators
  4. electrostatic induction
  5. Coulomb force law between point charges (constants k, permittivity of free space ε0)
  6. superposition of forces, using in force diagrams and with Newton's Laws

Chapter 22

  1. electric field concept; equation for E of point charge; superposition of E
  2. test charge method of finding electric field
  3. electric field lines:
    1. out of positive, into negative, can't cross
    2. density corresponds to field strength
  4. shell theorem
  5. E field of electric dipole
  6. electric dipole moment p
  7. force on charge in external E field (charge does not feel own field)
  8. motion of charged object in uniform E field
  9. torque on electric dipole in external E field
  10. potential energy of an electric dipole in external E field
  11. qualitatively, what happens to a dipole in a non-uniform external E field

Integration of Extended Objects

  1. charge densities (linear density λ, surface or area density σ, and volume density ρ)
  2. object integrals to obtain total charge
  3. object integrals to obtain E-field due to one-dimensional extended objects (straight rod)
    (do each component, symmetry helps out)
  4. using symmetry to simplify object integrals
  5. other object integrals (point on axis of ring, point at center of arc)
  6. object integrals of certain flat objects
  7. superposition of several objects

Chapter 23

  1. flux of flowing fluid Φ
  2. electric flux
  3. integral definition of flux (we don't ever actually do this integral)
  4. conductors: no interior electric field
  5. Gauss's Law, cavities in conductors: Finding induced charges or charge densities
  6. Gauss's Law, Spherical Symmetries: choosing a Gaussian surface, finding Electric fields based on charge information
  7. Gauss's Law, Cylindrical Symmetries: choosing a Gaussian surface, finding Electric fields based on charge information
  8. superposition of objects that individually have one of these symmetries
  9. Gauss's Law: Planar symmetries, how to choose a Gaussian surface