Two rings of radius 5 cm are 20 cm apart and concentric with a common horizontal x-axis. The ring on the left carries a uniformly distributed charge of +35 nC, and the ring on the right carries a uniformly distributed charge of -35 nC. What is the electric field due to the right ring at a location midway between the two rings?= < X, Y, Z > N/CWhat is the electric field due to the left ring at a location midway between the two rings?= < X, Y, Z > N/CWhat is the net electric field at at a location midway between the two rings?= < X, Y, Z > N/CIf a charge of -7 nC were placed midway between the rings, what would be the force exerted on this charge by the rings?= < X, Y,Z> N

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