Recent content by Minakami

  1. M

    Drawing field lines with MATLAB

    Homework Statement Consider a uniformly charged half spherical shell. The total charge is Q and the radius is R. a) Calculate the electric field as a function of z for – 5R < z < 5R. b) Draw equipotential curves in the xz-plane for – 5R < x, z < 5R with at least 8 equallyspaced curves...
  2. M

    Mean drift velocity of a conduction electron in copper.

    Homework Statement Estimate the mean drift velocity of a conduction electron in copper, assuming that there is one conduction electron per atom. Consider No. 14 wire (diamter 0.16 cm), common in houses, carrying 5A. The result should be very small. Why then does an electric light turn on...
  3. M

    How Do Commutators Influence Eigenvalues in Quantum Mechanics?

    Homework Statement Homework Equations The Attempt at a Solution I think I have to use the fact that [a+ , a] = 1 but I don't know where to apply this.
  4. M

    Solving Gauss's Law for Constant Electric Field: q, a, b

    Homework Statement The spherical region a < r < b carries a charge per unit volume of \rho = A/r, where A is a constant. At the center (r = 0) of the enclosed cavity is a point charge q. What should be the value of A so that the electric field in the region a< r < b has constant magnitude...
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