If the net flux through a gaussian surface is zero, the following four statements could be true. Which of the statements must be true? (a) There are no charges inside the surface. (b) The net charge inside the surface is zero. (c) The electric field is zero everywhere on the surface. (d) The number of electric field lines entering the surface equals the number leaving the surface.

A square conducting plate 54.0 cm on a side and with no net charge is placed in a region, where there is a uniform electric field of 75.0 kN/C directed to the right and perpendicular to the plate. (a)Find the charge density (in nC/m2) on the surface of the right face of the plate. (b)Find the charge density (in nC/m2) on the surface of the left face of the plate. (c)Find the magnitude (in nC) of the charge on either face of the plate.

Two infinite nonconducting plates are parallel to each other, with a distance d = 12.0 cm between them. Each plate carries a uniform charge distribution with the surface charge density o = 4.28 μ C/m². What is the magnitude of the electric field at point R (with r = 17.0 cm)? ச 16 R 22 0.00 N/C 4.84 x 105 N/C O 5.80 x 105 N/C 3.87 x 105 N/C 3.39 X 105 N/C X

A thin, square, conducting plate 49.0 cm on a side lies in the xy plane. A total charge of 3.70 x 10-8 C is placed on the plate. You may assume the charge density is uniform. (a) Find the charge density on each face of the plate. C/m² (b) Find the electric field just above the plate. magnitude N/C direction -Select--- ✓ (c) Find the electric field just below the plate. magnitude N/C direction -Select--- ✓