An electron is released from rest on the axis of a uniform positively charged ring, 0.200 m from the ring's center. if the linear charge density of the ring is 0.100 µc/m and the radius of the ring is 0.400 m, how fast will the electron be moving when it reaches the center of the ring?

Determine the maximum r-value of the polar equation r =3+3 cos 0

If we decrease the amount of force and keep all other factors the same what will happen to the amount of work

One kind of e-book display consists of millions of very small spheres that float in a thin fluid layer between two conducting transparent plates. each sphere is black on one side and white on the other, and possesses an electric dipole moment directed from the white side to the black. when an electric field is applied between the plates, the spheres rotate so that their dipole moment lines up with the field. depending on the fields direction, either the black or the white sides of th espheres can be made visible.the dipole moment of the spheres can be modeled as two opposite charges of magnitude 3.5 x 10^-15 c, separated by a distancce of 100 micrometers (um). what is the maximum possible torque on a sphere if the electric field between the transparent plates is 4.0 x 10^5 n/c