Athin, metallic spherical shell of radius 0.227 m has a total charge of 6.03 × 10 − 6 c placed on it.

a point charge of 1.15 × 10 − 6 c is placed at the center of the shell.

what is the electric field magnitude e a distance 0.735 m from the center of the spherical shell?

Explanation:

Given

radius

Charge on surface

Point Charge inside sphere

Electric Field at

Treating Surface charge as Point charge and applying Gauss law

where A=surface area up to distance r

unlike poles attract

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