Apositive charge q = 4 nc is placed in the center of a ring of radius r = 5 cm. the ring carries a uniformly distributed negative charge of total magnitude -4 μc. if the charge q moves a small distance from the center x, as indicated in the figure, show that it will describe a simple harmonic motion and calculate the period of the oscillation if the mass of the particle is m = 6 g.

Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp, max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?