Aslab of insulating material has thickness 2d and is oriented so that its faces are parallel to the yz-plane and given by the planes x = d and x = -d. the y- and z-dimensions of the slab are very large compared to d and may be treated as essentially infinite. the slab has a uniform positive charge density p.
a. explain why the electric field due to the slab is zero at the center of the slab (x=0).
b. using gauss's law, find the magnitude of the electric field due to the slab at the points 0< = x < = d. express your answer in terms of the variables p, x, d, and e_0.
d. using gauss's law, find the magnitude of the electric field due to the slab at the points x> = d. express your answer in terms of the variables p, x, d, and e_0.
e. what is the direction of the electric field due to the slab at the pints x > = d.

show the diagram then i will answer

your answer is c! hope this : )

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia