An infinitely long line charge of uniform linear charge density λ = -2.10 µc/m lies parallel to the y axis at x = -3.00 m. a point charge of 2.40 µc is located at x = 2.00 m, y = 3.00 m. find the electric field at x = 3.00 m, y = 2.50 m.

An electron is trapped at a defect in a crystal. the defect may be modeled as a one-dimensional, rigid-walled box of width 1.00 nm. (a) sketch the wavefunctions and probability densities for the n 1 and n 2 states. (b) for the n 1 state, nd the probability of nding the electron between x1 0.15 nm and x2 0.35 nm, where x 0 is the left side of the box. (c) repeat (b) for the n 2 state. (d) calculate the energies in electron volts of the n 1 and n 2 states