85. A non-conducting spherical shell of inner radius a and outer radius bị is uniformly charged with charged density Pi inside another non-conducting spherical shell of inner radius a, and outer radius b, that is also uniformly charged with charge density P2. See below. Find the electric field at space point P at a distance r from the common center such that (a) r> b2, (b) az

1. A total charge +Q is distributed over a plastic line in square shape with sides are equal to 2a. The line is so thin that thickness is negligible. The square is positioned to the center. Find the electric field (E =?) at point P which is positioned away from the center (F, = xpi + yei .xp > avz, yp > avz and xp, yp are constant). y p=xpi+ Yp) 2a 0,0 2a

A solid, insulating sphere of radius a = 2 cm has been charged uniformly by a density ρ = 300 µC/m3. The magnitude of the electric field (in N/C) at a point inside sphere 2 cm from its center is Select one: a. 0 N/C b. 2.26x 105 c. 4.5 x 105 d. 6.78 x 105 e. 7.22 x 105

1. a nonconducting rod of length L has charge -q uniformly distributed along its length. (a) What is the linear charge density of the rod? (b) What is the electric field at point P, a distance a from the end of the rod? (c) If P were very far from the rod compared to L, the rod would look like a point charge. Show that your answer to (b) reduces to the electric field of a point charge for a >> L.