The electric flux through a square- shaped area of side 4 cm near a large charged sheet is found to be 2.8 × 10-5 N * m²/C when the 2 area is parallel to the plate. What is the charge density on the sheet?

The electric field 0.310 mm from a very long uniform line of charge is 780 N/C. How much charge is contained in a section of the line of length 2.80 cm?

Charge is distributed uniformly throughout the volume of an infinitely long cylinder of radius R = 3.00×10-2 m. The charge density is 4.00×10-2 C/ m3. a)What is the electric field at r = 1.50×10-2 m?  b)What is the electric field at r = 6.00×10-2 m?

A long silver rod has a radius of 3 cm and a charge density of -13μC/cm on its surface. a) The electric field may be expressed as E=Err^where r^ is perpendicular to and points away from the symmetry axis. What is ErEr, in newtons per coulomb, at a point 5.5 cm from the symmetry axis of the rod?  b) The electric field may be expressed as E=Err^where r^ is perpendicular to and points away from the symmetry axis. What is ErEr, in newtons per coulomb, at a point 0.75 cm from the symmetry axis of the rod?