Recent content by Minakami

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...

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...

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.

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...